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Relevant bibliographies by topics / Objective- and subjective assessment

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Academic literature on the topic 'Objective- and subjective assessment'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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Journal articles on the topic "Objective- and subjective assessment"

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Campbell, H. "Risk assessment: subjective or objective?" Engineering Science & Education Journal 7, no. 2 (1998): 57–63. http://dx.doi.org/10.1049/esej:19980202.

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Usui, Nobuo, Kazuhiro Kawano, Koichi Ito, and Madoka Ishibashi. "Subjective and Objective Assessment of UPPP." Practica Oto-Rhino-Laryngologica 95, no. 8 (2002): 831–36. http://dx.doi.org/10.5631/jibirin.95.831.

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Murray, Brian James. "Subjective and Objective Assessment of Hypersomnolence." Sleep Medicine Clinics 12, no. 3 (2017): 313–22. http://dx.doi.org/10.1016/j.jsmc.2017.03.007.

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Murray, Brian James. "Subjective and Objective Assessment of Hypersomnolence." Sleep Medicine Clinics 15, no. 2 (2020): 167–76. http://dx.doi.org/10.1016/j.jsmc.2020.02.005.

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Claros-Salinas, Dolores, Daniel Bratzke, and Hannes Schröter. "Subjective and objective assessment of fatigue." Journal of the Neurological Sciences 298, no. 1-2 (2010): 165–66. http://dx.doi.org/10.1016/j.jns.2010.08.005.

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van Empel, Pieter J., Lennart B. van Rijssen, Joris P. Commandeur, et al. "Objective versus Subjective Assessment of Laparoscopic Skill." ISRN Minimally Invasive Surgery 2013 (July 2, 2013): 1–5. http://dx.doi.org/10.1155/2013/686494.

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Background. The equality of subjective- and objective-assessment methods in laparoscopic surgery are unknown. The aim of this study was to compare a subjective assessment method to an objective assessment method to evaluate laparoscopic skill. Methods. A prospective observational cohort study was conducted. Seventy-two residents completed a basic laparoscopic suturing task on a box trainer at two consecutive assessment points. Laparoscopic skill was rated subjectively using the Objective Structured Assessment of Technical Skills (OSATS) list and objectively using the TrEndo, an augmented-reality simulator. Results. TrEndo scores between the two assessment points correlated. OSATS scores did not correlate between the two assessment points. There was a correlation between TrEndo and OSATS scores at the first assessment point, but not at the second assessment point. Overall, OSATS scores correlated with TrEndo scores. There was a greater spread within OSATS scores compared to TrEndo scores. Conclusion. OSATS scores correlated with TrEndo scores. The TrEndo may be more responsive at rating individual’s laparoscopic skill, as demonstrated by a smaller overall spread in TrEndo scores. The additional value of objective assessment methods over conventional assessment methods as provided by laparoscopic simulators should be investigated.

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Yamada, Teppei, Yoichiro Yoshida, Naoya Aisu, et al. "Subjective and objective assessment of oxaliplatin-induced peripheral neuropathy." Journal of Clinical Oncology 33, no. 3_suppl (2015): 772. http://dx.doi.org/10.1200/jco.2015.33.3_suppl.772.

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772 Background: Oxaliplatin-induced peripheral neuropathy (PN), for which no therapy has been firmly established, is a critical factor that makes the continuation of chemotherapy difficult. Numbness and pain are currently evaluated using subjective methods such as the visual analog scale (VAS). However, because the assessment of pain can greatly vary depending on the mood and physical state of the patient at the time of assessment, it is best to objectively evaluate pain. Therefore, a method for objective assessment is also required to evaluate drugs designed to ameliorate PN. Pain Vision PS-2100 (PV) is an analytical instrument that was designed to quantitatively and objectively assess sense perception and nociception in a patient. Although it is used in the field of anesthesiology, there have been no reports concerning its use for the assessment of oxaliplatin-induced PN. Methods: The present study examined the correlation of subjective and objective assessment results using VAS and PV, respectively, for cases of oxaliplatin-induced PN. Subjects comprised 58 patients with colorectal cancer who underwent chemotherapy at the Fukuoka University. Results: Both VAS and PV assessments of PN were performed 173 times in total, and partial correlation coefficient analysis adjusted by subject and gender. The VAS and PV mean values of PN were 20.5 (0–100) and 27.9 (0–416), respectively. The partial correlation coefficient was 0.258 (p=0.0053). Conclusions: Although both assessments evaluated the same events, no strong correlation was observed between the results and a weak correlation was observed between VAS and PV. These results suggest that because VAS and PV each measure different factors, both subjective and objective assessments of drugs designed to ameliorate oxaliplatin-induced PN are necessary.

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Orwig, Russell L., and Michael D. Fimmen. "Quality of Life Comparison: Objective Assessment versus Subjective Assessment." Journal of Baccalaureate Social Work 11, no. 1 (2005): 30–39. http://dx.doi.org/10.18084/1084-7219.11.1.30.

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Quality of life assessment has been proposed as a possible research tool for evaluating the life experiences of individuals in different cultures. The bulk of the literature on quality of life recognizes the existence of two separate but related measures of quality of life: objective measures (tangible and observable measures) and subjective measures (cognitive assessment or satisfaction with existing tangibles). The question is whether the subjective and objective measure of general quality of life of one culture can be used to assess or predict the quality of life in another. The current investigation suggests quality of life is best assessed within the context of the culture in which the individual resides and makes recommendations for social work education to reinforce cultural sensitivity through study abroad in order to prepare future social workers to meet the social service demands in a globalized world.

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Malata, C. M., J. C. Boot, E. T. Bradbury, A. R. B. Ramli, and D. T. Sharpe. "Congenital breast asymmetry: subjective and objective assessment." British Journal of Plastic Surgery 47, no. 2 (1994): 95–102. http://dx.doi.org/10.1016/0007-1226(94)90166-x.

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BEILKEN, S. L., L. M. EADIE, P. N. JONES, and P. V. HARRIS. "Objective and Subjective Assessment of Australian Sausages." Journal of Food Science 56, no. 3 (1991): 636–42. http://dx.doi.org/10.1111/j.1365-2621.1991.tb05346.x.

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Dissertations / Theses on the topic "Objective- and subjective assessment"

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Statham, Andrew. "Subjective and objective assessment of tennis racket performance play." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/4080.

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Assessment of wielded implement performance is important to a variety of human endeavours and often critical to success in a sports context, particularly so in the game of tennis. Tennis racket design and manufacture is a multimillion business involving 10 major international companies. Tennis participation is currently estimated at around 60 million individuals worldwide. Thus the importance of optimum racket performance to maximise competitive advantage and minimise the risks of injury is clear. This thesis presents work to enable advances in tennis racket performance with respect to player feel perception, measurement of physical phenomena and the correlation of these aspects within real play contexts. To investigate feel perception a methodology was adapted from the existing literature. Interview testing was conducted to elicit a comprehensive range of tennis specific vocabulary. The end goal was to create a perception relationship map or 'feel map'. The inductive analysis was used to link all the related clustered themes identified from the vocabulary to sub and base themes describing the relationship. Further analysis introduced higher level general dimensions that unified common base themes. The resulting feel maps were created from both English and German sample groups, with a view to subsequent comparison. To complete the map and broaden its application a wide scale questionnaire was distributed to a tennis playing population. The responses provided data indicating percentile use of selected vocabulary within the tennis community and the relative importance players associate with assorted perception groups. Visual representations of the data were introduced to the map for quick and easy use and an associated lexicon compiled to provide a reference for more detailed information. The feel maps and lexicon provide users with a versatile tool in the form of a 'perception relationship model'. The map itself can act as an overall research guide for future work in the field. The addition of percentile use and relative importance data mean the map can be used to create more informed and subtle player test questionnaires or as a design aid, with interdependency links indicating which additional factors should be considered or exploited for their influence on the characteristic areas in question. Interestingly the general dimensions of highest relative importance were sound and grip respectively. This may be due to the basic level of interaction between player and racket which ultimately has to be perceived either through the grip or from the sound. A perception test questionnaire was also created with the use of the feel map and later used to study the correlation between objective and subjective measures. To best attain objective measures from the racket an innovative instrumentation system was created. Two alternative systems were designed and tested, the first based on wired instrumentation and data capture the second based on wireless technologies as these became available. Both systems were required to take measures of grip pressure and acceleration with 6 degrees of freedom. The first system utilised uniaxial accelerometers mounted on an aluminium bracket, and a triaxial accelerometer inserted inside the butt of the racket arranged to allow measurement and calculation of acceleration from the required 6 degrees of freedom. The system could be adapted to include either TekScan multi-cell full grip coverage force measurement, or 2 single point higher sample rate single cell grip force sensors. All data was fed via 15 m of cable to data acquisition systems. This restricted the participants' freedom of movement and encumbered the racket and thus the systems application, making it unsuitable for extensive perception or fatigue testing. The second system utilised a compact data logger with an integrated on board tri-axial accelerometer small enough to be mounted within the racket handle. A revised mount overcame the need for the aluminium throat bracket, moving the uniaxial accelerometers into a bulbous addition to the butt of the racket. The system was capable of capturing 8 channels simultaneously which allowed for the 6 accelerometers and two single cell grip force sensors to be located under the grip. The system was more difficult to adapt and maintain than the wired system, but improved freedom and reduced added weight to the racket made the system far more suitable for the planned perception and fatigue testing. Fatigue testing conducted with the wireless device investigated the effect of full body fatigue on players' performance by monitoring the resultant effects in the racket. The protocol was based on the multistage fitness test, designed to progressively increase in difficulty until volitional fatigue. Heart rate data indicated that the protocol was successful in fatiguing the participants to a point at or near their VO2max. Unfortunately, with the wireless system in its early stages of development, the device failed mid way through testing. The limited data set that was collected indicated that technique was affected by fatigue. Further research is required to confirm this finding and to make comparisons between racket types during the fatiguing process. The wireless device was adapted to make it more durable and reliable before the planned perception testing was conducted. A protocol was developed to investigate the affect of changing racket moment of inertia on player perception and physical measures. The test questionnaire developed from the feel map was used to evaluate player perception ratings of various elements of racket feel, and the wireless instrumentation system was used as part of methodology designed to compile a set of comparable physical data. A detailed analysis of the results revealed that there was some evidence of correlation between the perceptions of power, balance, flexibility and control and the moment of inertia of the racket. In a design optimisation context, however, more definitive correlations would be more useful. These would be expected to be found with future testing utilising a wider range of racket properties. The research proves to a large extent the original hypothesis that through the use of non invasive instrumentation and improved player perception elicitation techniques it is possible to substantially and usefully improve the objective and subjective assessment of tennis racket performance in play to enable investigation of better design characteristics and fatigue related injury phenomena.

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Freeman, Jonathan. "Subjective and objective approaches to the assessment of presence." Thesis, University of Essex, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298879.

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Skildheim, Kim Daniel. "Subjective and Objective Crosstalk Assessment Methodologies for Auto-stereoscopic Displays." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18913.

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Stereoscopic perception is achievable when the observer sees a scene from a slightly different angle. Auto-stereoscopic displays utilize several separate views to achieve this without using any special glasses. Crosstalk is an undesired effect of separating views. It is one of the most annoying artefacts occurring in an auto-stereoscopic display. This experiment has two parts. The first part proposes a subjective assessment methodology for characterizing crosstalk in an auto-stereoscopic display, without restriction of subjects viewing behaviour. The intention was to create an inexpensive method. The measurement was performed by using a Kinect prime sensor as a head tracking system combined with subjective score evaluation to get a data plot of the perceived crosstalk. The crosstalk varies in line with image content, disparity and viewing position. The result is a data plot that approaches a periodically pattern, which is consistent with the characteristics of an auto-stereoscopic display. The result is not perfect since there are many sources of errors occurring. These errors can be improved with better head tracking, an improved movement system, post processing of data, more data and removal of outliers.The second part proposes methods for extracting subjective values based on interpolated plots and creating objective crosstalk influenced pictures which correlate with the subjective data. The best extraction method was to combine an adapted sine regression curve with a linear interpolation. This interpolation followed the subjective values in a parallel slice plot at 3.592 m from the screen. The interpolation was adapted to fit a derived model as best as possible to achieve a good correlation. Objective crosstalk pictures were created, where the amount of crosstalk was determined by the neighbouring view that influenced the current view the most. The correlation was based on the relationship between the SSIM value from the created crosstalk picture and the extracted subjective value. The total correlation of the pictures together were 0,8249, where the picture with the highest correlation had 0,9561. This method is quite good for pictures that have a maximum disparity grade below 38 pixels. The overall result is good and it is also a measure of quality for the subjective test. This result can be improved by increasing the complexity of how the objective crosstalk pictures are created by adding more views into account or try another method to create crosstalk. Improved extraction of subjective values will also be beneficial in terms of improving the correlation even more.

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Su, He Zhicheng Xuxin. "Links between Subjective Assessments and Objective Metrics for Steering." Thesis, KTH, Fordonsdynamik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101925.

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The characteristics of vehicle steering perception are decisive factors concerning vehicle safety and overall pleasure behind the wheel. It is a challenge for vehicle manufacturers to achieve these features and qualities, because usually vehicle tuning almost only relies on subjective evaluation of test drivers, which is costly and time consuming. In order to optimize suspension design and develop a tool that can be used to evaluate steering with objective metrics instead of subjective assessment, links between them must be confirmed. In this master thesis, both objective and subjective testing data of over 20 vehicles across four different segments are introduced in linear and nonlinear analysis. Linear regression analysis is applied to investigate simply positive or negative correlation between a pair of subjective-objective parameters. However, even if certain linear correlations are obtained, it is still hard to define the optimal value for objective metrics. Considering that the general shape of a correlation function can reveal which objective range give higher subjective rating, it is possible to define these preferred ranges with Neural Network (NN). The best data available is adopted from three drivers who tested 15 sedans, and some interesting results are found. The initial results demonstrate that NN is a powerful tool to uncover and graphically illustrate the links between objective metrics and subjective assessments, i.e., the specific range leading to better steering feel. Given a larger sample size, more reliable and optimal links can be defined by following the same method. These confirmed links would enable vehicle dynamics engineers to more effectively develop new vehicles with nearly perfect steering feel.

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Luotonen, David, and Markus Hasselström. "Subjective and objective performance assessment : Performance pay at Trelleborg Forsheda AB." Thesis, Jönköping University, JIBS, Business Administration, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-9660.

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<p> </p><p>The purpose of this thesis is to understand the opinions and potential effects of objective and subjective assessments of performance as a basis for performance pay for blue-collar workers.</p><p>The study takes a qualitative approach to find out how and why four companies - Trelleborg Forsheda, Finnveden Powertrain, Isaberg Rapid and Parker Hannifin- work with salaries, incentive system and performance assessment the way they do.</p><p>The concept of individual salary is central in this thesis, and individual salary is based on four criteria; capabilities, performance, work demand and formal competence. These can be divided in subjective or objective criteria. Individual salaries also contribute to salary divergence, which in many studies have indicated higher performance. Important to remember is that it has to exist a purpose to salary divergence and how salary is diverged in the company is related to the goals and strategy of the company. If the company chooses to have performance based salaries- which is salary divergence- another question arise; what is good performance?</p><p>In organizations that have performance salaries, a group or an individual (often the middle manager) have to decide if a certain group of personnel performs good or bad. This can mainly be done in two different ways; objective performance assessment or subjective performance assessment. Objective performance assessment is based on numerical calculation of measures, which will form the basis for rewarding employees using a salary system that reward performance. Subjective performance measurements are based on judgment. Instead of relying on numerical calculations, one evaluates if the results reflect good or bad performance.</p><p>For both methods it is essential that the personnel feels that the salaries are fair, and that the salary system is clear and easy to understand. Something else that is important to understand is that employer and employee have different views in what is a fair salary.</p><p>Objective assessments are based on numerical calculations of measures, and one important property such measures have is that they don’t leave any room for excuses. Research indicate that performance pay has important motivation enhancing effects, but the profitability doesn’t always benefit from it. When monitoring costs are high, or product quality or long term thinking is required, hourly wages may be preferable. Tasks which are measured, will naturally be prioritized by the organization. This means that the choice of measures is very important. The amount of measures mustn’t be too high, and they have to be carefully considered. Subjective assessments are the opposite to objective ones. The advantages with subjective performance assessments are, among other things, that additional information which have surfaced during the period of measurements can be taken into consideration, errors in the measurement process can be corrected and unlucky circumstances can be dealt with. However, problems exist in unfair assessments, which are based on prejudice.</p><p>Findings in this report shows that profitable companies have large differences in their salary systems. This is also supported by other research. The company Isaberg Rapid AB only uses objective criteria, focused on simplicity and group rewards. Finnveden Powertrain on the other hand, has a system focused on individuals and subjective assessments. Some conclusions could be drawn; one of the most important being that connections between the type of activities and the salary system is positive, and that salary systems have to be updated and revised continuously.</p><p> </p>

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Dalasari, Venkata Gopi Krishna, and Sri Krishna Jayanty. "Low Light Video Enhancement along with Objective and Subjective Quality Assessment." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13500.

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Enhancing low light videos has been quite a challenge over the years. A video taken in low light always has the issues of low dynamic range and high noise. This master thesis presents contribution within the field of low light video enhancement. Three models are proposed with different tone mapping algorithms for extremely low light low quality video enhancement. For temporal noise removal, a motion compensated kalman structure is presented. Dynamic range of the low light video is stretched using three different methods. In Model 1, dynamic range is increased by adjustment of RGB histograms using gamma correction with a modified version of adaptive clipping thresholds. In Model 2, a shape preserving dynamic range stretch of the RGB histogram is applied using SMQT. In Model 3, contrast enhancement is done using CLAHE. In the final stage, the residual noise is removed using an efficient NLM. The performance of the models are compared on various Objective VQA metrics like NIQE, GCF and SSIM. To evaluate the actual performance of the models subjective tests are conducted, due to the large number of applications that target humans as the end user of the video.The performance of the three models are compared for a total of ten real time input videos taken in extremely low light environment. A total of 25 human observers subjectively evaluated the performance of the three models based on the parameters: contrast, visibility, visually pleasing, amount of noise and overall quality. A detailed statistical evaluation of the relative performance of the three models is also provided.

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Santos, Magalhães André. "Subjective and objective assessment of physically active people with knee injury." Thesis, University of Kent, 2016. https://kar.kent.ac.uk/60066/.

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Knee injuries are highly prevalent in physically active individuals and are frequently associated with sport participation. Independently of the nature of the injury, subjective and objective clinical measures are used to assess, monitor and evaluate treatment outcomes in this population. To be clinically meaningful, these outcome measures should be relevant to the condition, the anatomical area, the individual or population, and importantly, possess adequate psychometric properties. Despite a high prevalence of knee injuries, there are several aspects of the subjective and objective knee evaluation in physically active individuals that remain unclear or have not been considered in previous research. The main aim of the present thesis was to fill some of the gaps identified in the literature regarding both subjective and objective knee measures in physically active individuals. Therefore, this thesis was divided into two distinct parts. The first part looked at the patient-reported outcome (PRO) measures of the knee and physical activity, and consisted of two studies. The first study was a systematic review conducted to explore the PRO measures that are commonly used in the evaluation of physical activity and return to sport following autologous chondrocyte implantation (ACI). Aiming as well, to provide a critical analysis of these instruments from a rehabilitative perspective. This review revealed not only the heterogeneity in the selection, but also in the timing and reporting of patient-reported activity scoring instruments following ACI, which makes a systematic comparison difficult and introduces bias into the interpretation of these outcomes. Another important finding of this review, was that the instruments currently used to evaluate postoperative outcomes in an articular cartilage repair population do not always fulfil the rehabilitative needs of physically active individuals. The second study was conducted in recreational marathon runners and aimed to provide normative values for a widely used knee specific PRO measure in athletes with knee injury, the Knee Injury Osteoarthritis Outcome Score (KOOS). Alongside the normative KOOS subscales values stratified by age group and history of knee injury that were presented, this study also showed that recent history of knee running-related injury (RRI) has a negative impact on the KOOS scores. In runners with no history of knee RRI, the results observed suggested a lack of interaction between KOOS subscale values and age. Furthermore, the KOOS values seen were substantially higher compared to previously published normative population-based KOOS values. The second part of the present thesis comprised three experimental studies concerning single-leg cycling (SLC) exercise testing, in particular assessing the potential use of the self-paced test (SPT) concept as an objective measure following knee surgery. The first study analysed the reliability of a 5x2 min stages SPT anchored to the rate of perceived exertion (RPE) for SLC exercise testing. This study showed that this test protocol elicits reliable cardiorespiratory and metabolic responses. The second study examined the validity of the SPT protocol used in the previous study, through a concurrent comparison against a conventional fixed power incremental SLC exercise test. This investigation showed that the 5x2 min SPT provides a valid objective means for assessing peak aerobic capacity in SLC exercise testing. Moreover, it may be associated with increased activity enjoyment comparatively to conventional testing. The third and last experimental study investigated the effect of a 10 kg counterweight device (CW10) on cardiorespiratory, metabolic and perceptual responses to SLC exercise testing. The results of this study demonstrated that the CW10 despite eliciting an improvement in the activity enjoyment, did not affect peak cardiorespiratory and metabolic responses to SLC exercise testing. When matched for test duration the SPT elicited higher peak power output and peak oxygen consumption than conventional incremental testing, regardless of the CW10 usage or not. In conclusion, the original work of the present thesis increases the body of knowledge of two distinct, but complementary fields in the subjective and objective knee assessment of physically active individuals. The outcomes provided both on PRO measures and SLC exercise testing, may have impact on the clinical practice of clinicians, sport rehabilitation professionals and researchers.

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Guo, Jinjiang. "Contributions to objective and subjective visual quality assessment of 3d models." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI099.

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Dans le domaine de l’informatique graphique, les données tridimensionnelles, généralement représentées par des maillages triangulaires, sont employées dans une grande variété d’applications (par exemple, le lissage, la compression, le remaillage, la simplification, le rendu, etc.). Cependant, ces procédés introduisent inévitablement des artefacts qui altèrent la qualité visuelle des données 3D rendues. Ainsi, afin de guider perceptuellement les algorithmes de traitement, il y a un besoin croissant d'évaluations subjectives et objectives de la qualité visuelle à la fois performantes et adaptées, pour évaluer et prédire les artefacts visuels. Dans cette thèse, nous présentons d'abord une étude exhaustive sur les différentes sources d'artefacts associés aux données numériques graphiques, ainsi que l’évaluation objective et subjective de la qualité visuelle des artefacts. Ensuite, nous introduisons une nouvelle étude sur la qualité subjective conçue sur la base de l’évaluations de la visibilité locale des artefacts géométriques, dans laquelle il a été demandé à des observateurs de marquer les zones de maillages 3D qui contiennent des distorsions visibles. Les cartes de distorsion visuelle collectées sont utilisées pour illustrer plusieurs fonctionnalités perceptuelles du système visuel humain (HVS), et servent de vérité-terrain pour évaluer les performances des attributs et des mesures géométriques bien connus pour prédire la visibilité locale des distorsions. Notre deuxième étude vise à évaluer la qualité visuelle de modèles 3D texturés, subjectivement et objectivement. Pour atteindre ces objectifs, nous avons introduit 136 modèles traités avec à la fois des distorsions géométriques et de texture, mené une expérience subjective de comparaison par paires, et invité 101 sujets pour évaluer les qualités visuelles des modèles à travers deux protocoles de rendu. Motivés par les opinions subjectives collectées, nous proposons deux mesures de qualité visuelle objective pour les maillages texturés, en se fondant sur les combinaisons optimales des mesures de qualité issues de la géométrie et de la texture. Ces mesures de perception proposées surpassent leurs homologues en termes de corrélation avec le jugement humain<br>In computer graphics realm, three-dimensional graphical data, generally represented by triangular meshes, have become commonplace, and are deployed in a variety of application processes (e.g., smoothing, compression, remeshing, simplification, rendering, etc.). However, these processes inevitably introduce artifacts, altering the visual quality of the rendered 3D data. Thus, in order to perceptually drive the processing algorithms, there is an increasing need for efficient and effective subjective and objective visual quality assessments to evaluate and predict the visual artifacts. In this thesis, we first present a comprehensive survey on different sources of artifacts in digital graphics, and current objective and subjective visual quality assessments of the artifacts. Then, we introduce a newly designed subjective quality study based on evaluations of the local visibility of geometric artifacts, in which observers were asked to mark areas of 3D meshes that contain noticeable distortions. The collected perceived distortion maps are used to illustrate several perceptual functionalities of the human visual system (HVS), and serve as ground-truth to evaluate the performances of well-known geometric attributes and metrics for predicting the local visibility of distortions. Our second study aims to evaluate the visual quality of texture mapped 3D model subjectively and objectively. To achieve these goals, we introduced 136 processed models with both geometric and texture distortions, conducted a paired-comparison subjective experiment, and invited 101 subjects to evaluate the visual qualities of the models under two rendering protocols. Driven by the collected subjective opinions, we propose two objective visual quality metrics for textured meshes, relying on the optimal combinations of geometry and texture quality measures. These proposed perceptual metrics outperform their counterparts in term of the correlation with the human judgment

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Shahid, Muhammad. "Methods for Objective and Subjective Video Quality Assessment and for Speech Enhancement." Doctoral thesis, Blekinge Tekniska Högskola [bth.se], Faculty of Engineering - Department of Applied Signal Processing, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00603.

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The overwhelming trend of the usage of multimedia services has raised the consumers' awareness about quality. Both service providers and consumers are interested in the delivered level of perceptual quality. The perceptual quality of an original video signal can get degraded due to compression and due to its transmission over a lossy network. Video quality assessment (VQA) has to be performed in order to gauge the level of video quality. Generally, it can be performed by following subjective methods, where a panel of humans judges the quality of video, or by using objective methods, where a computational model yields an estimate of the quality. Objective methods and specifically No-Reference (NR) or Reduced-Reference (RR) methods are preferable because they are practical for implementation in real-time scenarios. This doctoral thesis begins with a review of existing approaches proposed in the area of NR image and video quality assessment. In the review, recently proposed methods of visual quality assessment are classified into three categories. This is followed by the chapters related to the description of studies on the development of NR and RR methods as well as on conducting subjective experiments of VQA. In the case of NR methods, the required features are extracted from the coded bitstream of a video, and in the case of RR methods additional pixel-based information is used. Specifically, NR methods are developed with the help of suitable techniques of regression using artificial neural networks and least-squares support vector machines. Subsequently, in a later study, linear regression techniques are used to elaborate the interpretability of NR and RR models with respect to the selection of perceptually significant features. The presented studies on subjective experiments are performed using laboratory based and crowdsourcing platforms. In the laboratory based experiments, the focus has been on using standardized methods in order to generate datasets that can be used to validate objective methods of VQA. The subjective experiments performed through crowdsourcing relate to the investigation of non-standard methods in order to determine perceptual preference of various adaptation scenarios in the context of adaptive streaming of high-definition videos. Lastly, the use of adaptive gain equalizer in the modulation frequency domain for speech enhancement has been examined. To this end, two methods of demodulating speech signals namely spectral center of gravity carrier estimation and convex optimization have been studied.

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Anani, John Kodjo. "A subjective and objective assessment of sound insulation in newly converted dwellings." Thesis, Open University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316964.

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Books on the topic "Objective- and subjective assessment"

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Issues in clinical psychology: Subjective versus objective approaches. Allyn and Bacon, 1993.

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Subjective, intersubjective, objective. Clarendon Press, 2001.

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Press, S. James, ed. Subjective and Objective Bayesian Statistics. John Wiley & Sons, Inc., 2002. http://dx.doi.org/10.1002/9780470317105.

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Rowe, Alicia L. Anchoring effects on objective and subjective visual stimuli. Laurentian University, 2007.

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Hall, James W. Objective assessment of hearing. Plural Pub., 2010.

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Wet, Swanepoel De, ed. Objective assessment of hearing. Plural Pub., 2010.

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Klempner, Geoffrey V. Naive metaphysics: A theory of subjective and objective worlds. Avebury, 1994.

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Subjective and objective Bayesian statistics: Principles, models, and applications. 2nd ed. Wiley-Interscience, 2003.

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Tolley, Martin. Using objective questions in assessment. Nene College of Higher Education, Educational DevelopmentUnit, 1993.

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1933-, Nagpal Rup, and World Health Organization. Regional Office for South-East Asia., eds. Assessment of subjective well-being: The Subjective Well-Being Inventory (SUBI). World Health Organization, Regional Office for South-East Asia, 1992.

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Book chapters on the topic "Objective- and subjective assessment"

1

Newell, Philip, and Keith Holland. "Subjective and Objective Assessment." In Loudspeakers. Routledge, 2018. http://dx.doi.org/10.4324/9781315149202-9.

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Orehovački, Tihomir, and Toni Granollers. "Subjective and Objective Assessment of Mashup Tools." In Design, User Experience, and Usability. Theories, Methods, and Tools for Designing the User Experience. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07668-3_33.

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Israël, L., Dj Kozarevic, and J. M. Orgogozo. "Subjective and Objective Health in Aging: Problems of Assessment." In Modification of Cell to Cell Signals During Normal and Pathological Aging. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-72729-0_20.

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Lee, Dhong Won, Jin Goo Kim, and Jin Woo Lim. "Subjective and Objective Assessments of Knee Function." In Knee Arthroscopy. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8191-5_3.

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Poetschke, Julian, and Gerd G. Gauglitz. "Objective Assessment Technologies: General Guidelines for Scar Assessment." In Textbook on Scar Management. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44766-3_16.

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AbstractScar assessment has long relied on a variety of instruments, most of them questionnaires or scales that are susceptible to bias and limit the level of evidence in research. Throughout recent years, a variety of objective assessment tools have been developed. They allow for the exact quantification of different scar parameters such as texture, pliability, color, and size, thus facilitating detailed progress analysis throughout treatment.The advent of new technology, however, has its pitfalls, too. The number of different technologies available is hard to review, and oftentimes, clinical validation is lacking, making it hard for researchers to gauge whether a certain instrument is adequate for their individual projects.The use of each individual instruments has different requirements regarding patient preparation and calibration, and the measurements themselves can often be adjusted through a variety of parameters. This requires intensive familiarization with the respective instruments. Additionally, interpretation of the data can be complicated, and distinguishing statistically significant differences from clinically important differences remains difficult.Modern technology, however, allows researchers to measure treatment effects that otherwise would have eluded them through the use of subjective evaluation only.Through objective scar assessment technology and its detailed abilities to document changes throughout treatment, the evidence in scar-related research can be greatly improved, and current as well as new treatment options can finally be adequately gauged for their efficacy.

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Moortgat, Peter, Mieke Anthonissen, Ulrike Van Daele, Jill Meirte, Tine Vanhullebusch, and Koen Maertens. "Objective Assessment Techniques: Physiological Parameters in Scar Assessment." In Textbook on Scar Management. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44766-3_18.

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AbstractIn order to assess new and often costly treatments, the need for objective scar measurement tools has become increasingly important. A combination of subjective and objective measures should be the aim of every researcher. Quantitative assessment of scars requires devices to measure their physical and physiological properties. Physiological scar parameters are scar characteristics relevant to pathological scarring which cannot be seen with the bare eye. This also means that they can only be assessed with objective assessment tools.Skin hydration is defined as the water content of the epidermis and the dermis, and the ability of the skin to retain water is important to avoid dry appearance of the skin and prolonged inflammation in scarring. Many approaches exist to measure skin water content. One single method is often not enough to capture all the relevant information. Trans-epidermal water loss, stratum corneum water content, and dermal water content are equally important and related to each other.Scar maturation has been related to transcutaneous oxygen tension, and it is hypothesized that low levels of transcutaneous oxygen pressure in evolving scars result from low oxygen diffusibility through scar tissue.Tactile sensitivity of the skin can be measured by esthesiometers. The Semmes-Weinstein monofilament test is found to be a feasible and reliable outcome measure to evaluate touch perception threshold in older upper extremities burn scars.

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Koumaras, Harilaos G. "Objective and Subjective Assessment Methods of Video Quality in Multimedia Broadcasting." In Mobile Multimedia Broadcasting Standards. Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-78263-8_14.

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Aslam, Riffat, Annelotte C. M. van Bommel, Christian J. Hendriksz, and Andrea Jester. "Subjective and Objective Assessment of Hand Function in Mucopolysaccharidosis IVa Patients." In JIMD Reports. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/8904_2012_179.

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Qu, Lie, Yan Wang, Mehmet Orgun, Duncan S. Wong, and Athman Bouguettaya. "Evaluating Cloud Users’ Credibility of Providing Subjective Assessment or Objective Assessment for Cloud Services." In Service-Oriented Computing. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-45391-9_36.

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Barkowsky, Marcus, Kjell Brunnström, Touradj Ebrahimi, et al. "Subjective and Objective Visual Quality Assessment in the Context of Stereoscopic 3D-TV." In 3D-TV System with Depth-Image-Based Rendering. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-9964-1_14.

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Conference papers on the topic "Objective- and subjective assessment"

1

Previati, Giorgio, Massimiliano Gobbi, and Giampiero Mastinu. "Subjective-Objective Ride Comfort Assessment of Farm Tractors." In SAE 2016 World Congress and Exhibition. SAE International, 2016. http://dx.doi.org/10.4271/2016-01-1437.

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Queluz, Maria Paula, Francisco Lopes, João Ascenso, and António Rodrigues. "Subjective and objective quality assessment of omnidirectional video." In Applications of Digital Image Processing XLI, edited by Andrew G. Tescher. SPIE, 2018. http://dx.doi.org/10.1117/12.2321679.

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Tokunaga, Roberto Abraham, Akihiro Shimojo, Toru Hagiwara, Seiichi Kagaya, and Ken-etsu Uchida. "Effects of Cellular Telephone Use While Driving Based on Objective and Subjective Mental Workload Assessment." In Driving Assessment Conference. University of Iowa, 2001. http://dx.doi.org/10.17077/drivingassessment.1019.

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Istepanian, R. S. H., N. Philip, M. G. Martini, N. Amso, and P. Shorvon. "Subjective and objective quality assessment in wireless teleultrasonography imaging." In 2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2008. http://dx.doi.org/10.1109/iembs.2008.4650422.

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Wang, Anyang, Guangtao Zhai, Yuanchun Chen, Zhaohui Che, and Xiaokang Yang. "Subjective and objective quality assessment for color changed images." In 2017 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB). IEEE, 2017. http://dx.doi.org/10.1109/bmsb.2017.7986169.

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Crolla, D. A., D. C. Chen, J. P. Whitehead, and C. J. Alstead. "Vehicle Handling Assessment Using a Combined Subjective-Objective Approach." In International Congress & Exposition. SAE International, 1998. http://dx.doi.org/10.4271/980226.

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Sevcik, L., L. Behan, J. Frnda, M. Uhrina, J. Bienik, and M. Voznak. "Prediction of Subjective Video Quality Based on Objective Assessment." In 2018 26th Telecommunications Forum (TELFOR). IEEE, 2018. http://dx.doi.org/10.1109/telfor.2018.8612127.

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Uhrina, Miroslav, Juraj Bienik, Lukas Sevcik, and Miroslav Voznak. "Video Quality Assessment: Relationship between objective and subjective methods." In 2019 27th Telecommunications Forum (TELFOR). IEEE, 2019. http://dx.doi.org/10.1109/telfor48224.2019.8971137.

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Hou, Limin, Weiqi Wu, Shuang Yang, Tao Yang, and Xinpeng Zhang. "Subjective and objective quality assessment of re-sampling audio." In 2012 International Conference on Audio, Language and Image Processing (ICALIP). IEEE, 2012. http://dx.doi.org/10.1109/icalip.2012.6376634.

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Gaballah, Amr, Vijay Parsa, Monika Andreetta, and Scott Adams. "Objective and Subjective Assessment of Amplified Parkinsonian Speech Quality." In 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2018. http://dx.doi.org/10.1109/embc.2018.8512618.

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Reports on the topic "Objective- and subjective assessment"

1

Stevenson, Betsey, and Justin Wolfers. Subjective and Objective Indicators of Racial Progress. National Bureau of Economic Research, 2013. http://dx.doi.org/10.3386/w18916.

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Larson, Gerald, Robyn M. High-McRoy, Stephanie Booth-Kewley, et al. Reintegrating Subjective and Objective Aspects of War-Related PTSD. Defense Technical Information Center, 2008. http://dx.doi.org/10.21236/ada620092.

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Uehara, Hiroshi, Hiroshi Isoyama, Hikari Mukai, et al. Analysis of Correlation Between Subjective and Objective Rating for Idling Sound of Diesel Truck. SAE International, 2005. http://dx.doi.org/10.4271/2005-08-0027.

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DELTA INFORMATION SYSTEMS INC HORSHAM PA. Development of a Video Tape to Correlate Subjective and Objective Testing of Teleconference Systems. Defense Technical Information Center, 1990. http://dx.doi.org/10.21236/ada239566.

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Kuperman, Gilbert G., and Dorit Shaya. Subjective Assessment of SAR Imagery Enhancement Algorithms. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada341722.

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Potter, Scott S., and Jeine R. Bressler. Subjective Workload Assessment Technique (SWAT): A User's Guide. Defense Technical Information Center, 1989. http://dx.doi.org/10.21236/ada215405.

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Satava, Richard M. Metrics for Objective Assessment of Surgical Skills Workshop. Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada407534.

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Sinclair, Samantha, and Sandra LeGrand. Reproducibility assessment and uncertainty quantification in subjective dust source mapping. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41523.

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Accurate dust-source characterizations are critical for effectively modeling dust storms. A previous study developed an approach to manually map dust plume-head point sources in a geographic information system (GIS) framework using Moderate Resolution Imaging Spectroradiometer (MODIS) imagery processed through dust-enhancement algorithms. With this technique, the location of a dust source is digitized and recorded if an analyst observes an unobscured plume head in the imagery. Because airborne dust must be sufficiently elevated for overland dust-enhancement algorithms to work, this technique may include up to 10 km in digitized dust-source location error due to downwind advection. However, the potential for error in this method due to analyst subjectivity has never been formally quantified. In this study, we evaluate a version of the methodology adapted to better enable reproducibility assessments amongst multiple analysts to determine the role of analyst subjectivity on recorded dust source location error. Four analysts individually mapped dust plumes in Southwest Asia and Northwest Africa using five years of MODIS imagery collected from 15 May to 31 August. A plume-source location is considered reproducible if the maximum distance between the analyst point-source markers for a single plume is ≤10 km. Results suggest analyst marker placement is reproducible; however, additional analyst subjectivity-induced error (7 km determined in this study) should be considered to fully characterize locational uncertainty. Additionally, most of the identified plume heads (> 90%) were not marked by all participating analysts, which indicates dust source maps generated using this technique may differ substantially between users.

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Sinclair, Samantha, and Sandra LeGrand. Reproducibility assessment and uncertainty quantification in subjective dust source mapping. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41542.

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Accurate dust-source characterizations are critical for effectively modeling dust storms. A previous study developed an approach to manually map dust plume-head point sources in a geographic information system (GIS) framework using Moderate Resolution Imaging Spectroradiometer (MODIS) imagery processed through dust-enhancement algorithms. With this technique, the location of a dust source is digitized and recorded if an analyst observes an unobscured plume head in the imagery. Because airborne dust must be sufficiently elevated for overland dust-enhancement algorithms to work, this technique may include up to 10 km in digitized dust-source location error due to downwind advection. However, the potential for error in this method due to analyst subjectivity has never been formally quantified. In this study, we evaluate a version of the methodology adapted to better enable reproducibility assessments amongst multiple analysts to determine the role of analyst subjectivity on recorded dust source location error. Four analysts individually mapped dust plumes in Southwest Asia and Northwest Africa using five years of MODIS imagery collected from 15 May to 31 August. A plume-source location is considered reproducible if the maximum distance between the analyst point-source markers for a single plume is ≤10 km. Results suggest analyst marker placement is reproducible; however, additional analyst subjectivity-induced error (7 km determined in this study) should be considered to fully characterize locational uncertainty. Additionally, most of the identified plume heads (> 90%) were not marked by all participating analysts, which indicates dust source maps generated using this technique may differ substantially between users.

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Warr, Dartanian, Herbert A. Cole, and Gary B. Reid. A Comparative Evaluation of Two Subjective Workload Measures: The Subjective Workload Assessment Technique and the Modified Cooper Harper Scale. Defense Technical Information Center, 1986. http://dx.doi.org/10.21236/ada289493.

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