Relevant bibliographies by topics / Colorimetric calibration

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Colorimetric calibration'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Colorimetric calibration"

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Karaimer, Hakki Can, and Rang Nguyen. "A Correspondence-Free Color Chart Design for Color Calibration." London Imaging Meeting 2020, no. 1 (September 29, 2020): 100–104. http://dx.doi.org/10.2352/issn.2694-118x.2020.lim-01.

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Colorimetric calibration computes the necessary color space transformation to map a camera's device-specific color space to a device-independent perceptual color space. Color calibration is most commonly performed by imaging a color rendition chart with a fixed number of color patches with known colorimetric values (e. g., CIE XYZ values). The color space transformation is estimated based on the correspondences between the camera's image and the chart's colors. We present a new approach to colorimetric calibration that does not require explicit color correspondences. Our approach computes a color space transformation by aligning the color distributions of the captured image to the known distribution of a calibration chart containing thousands of colors. We show that a histogram-based colorimetric calibration approach provides results that are onpar with the traditional patch-based method without the need to establish correspondences.
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Hirai, Toshio, and Shinji Kobayashi. "Colorimetric calibration of Davis-Gibson's filters." JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 70, Appendix (1986): 110. http://dx.doi.org/10.2150/jieij1980.70.appendix_110.

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Schettini, R., B. Barolo, and E. Boldrin. "Colorimetric calibration of color scanners by back-propagation." Pattern Recognition Letters 16, no. 10 (October 1995): 1051–56. http://dx.doi.org/10.1016/0167-8655(95)00037-h.

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Manoocheri, Farshid, Steven W. Brown, and Yoshi Ohno. "21.3: NIST Colorimetric Calibration Facility for Displays — Part 2." SID Symposium Digest of Technical Papers 32, no. 1 (2001): 330. http://dx.doi.org/10.1889/1.1831863.

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Danielis, Alessandro, Massimiliano Guarneri, Massimo Francucci, Mario Ferri De Collibus, Giorgio Fornetti, and Arianna Mencattini. "A Quadratic Model with Nonpolynomial Terms for Remote Colorimetric Calibration of 3D Laser Scanner Data Based on Piecewise Cubic Hermite Polynomials." Mathematical Problems in Engineering 2015 (2015): 1–14. http://dx.doi.org/10.1155/2015/606948.

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The processing of intensity data from terrestrial laser scanners has attracted considerable attention in recent years. Accurate calibrated intensity could give added value for laser scanning campaigns, for example, in producing faithful 3D colour models of real targets and classifying easier and more reliable automatic tools. In cultural heritage area, the purely geometric information provided by the vast majority of currently available scanners is not enough for most applications, where indeed accurate colorimetric data is needed. This paper presents a remote calibration method for self-registered RGB colour data provided by a 3D tristimulus laser scanner prototype. Such distinguishing colour information opens new scenarios and problems for remote colorimetry. Using piecewise cubic Hermite polynomials, a quadratic model with nonpolynomial terms for reducing inaccuracies occurring in remote colour measurement is implemented. Colorimetric data recorded by the prototype on certified diffusive targets is processed for generating a remote Lambertian model used for assessing the accuracy of the proposed algorithm. Results concerning laser scanner digitizations of artworks are reported to confirm the effectiveness of the method.
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Shimano, Noriyuki. "Colorimetric Calibration of Video Cameras Using Two Color Constancy Models." Optical Review 5, no. 5 (September 1998): 320–25. http://dx.doi.org/10.1007/s10043-998-0320-5.

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Lee, Raymond L. "Colorimetric calibration of a video digitizing system: Algorithm and applications." Color Research & Application 13, no. 3 (June 1988): 180–86. http://dx.doi.org/10.1002/col.5080130311.

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Paradkar, Rajesh P., and Ronald R. Williams. "Genetic Regression as a Calibration Technique for Solid-Phase Extraction of Dithizone-Metal Chelates." Applied Spectroscopy 50, no. 6 (June 1996): 753–58. http://dx.doi.org/10.1366/0003702963905718.

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The application of genetic regression (GR) to reflectance spectra of a solid-phase colorimetric extraction for the determination of Hg(II) is demonstrated. GR is a technique that combines wavelengths that optimize linear regression using a genetic algorithm. Solid polystyrene (PS) beads with a molecular weight distribution of 125,000–250,000 were impregnated with Hg(II)-dithizonate, filtered, allowed to dry, and packed in quartz cuvettes, and their reflectance spectra were collected. Quantitation with the use of normal calibration methods could not be achieved because of baseline fluctuations which originate in sample packing, presentation to the spectrometer, and particle size. Results indicate that GR can easily compensate for these baseline fluctuations and provide excellent calibrations.
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Pinheiro, Tomás, João Ferrão, Ana C. Marques, Maria J. Oliveira, Nitin M. Batra, Pedro M. F. J. Costa, M. Paula Macedo, Hugo Águas, Rodrigo Martins, and Elvira Fortunato. "Paper-Based In-Situ Gold Nanoparticle Synthesis for Colorimetric, Non-Enzymatic Glucose Level Determination." Nanomaterials 10, no. 10 (October 14, 2020): 2027. http://dx.doi.org/10.3390/nano10102027.

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Due to its properties, paper represents an alternative to perform point-of-care tests for colorimetric determination of glucose levels, providing simple, rapid, and inexpensive means of diagnosis. In this work, we report the development of a novel, rapid, disposable, inexpensive, enzyme-free, and colorimetric paper-based assay for glucose level determination. This sensing strategy is based on the synthesis of gold nanoparticles (AuNPs) by reduction of a gold salt precursor, in which glucose acts simultaneously as reducing and capping agent. This leads to a direct measurement of glucose without any enzymes or depending on the detection of intermediate products as in conventional enzymatic colorimetric methods. Firstly, we modelled the synthesis reaction of AuNPs to determine the optical, morphological, and kinetic properties and their manipulation for glucose sensing, by determining the influence of each of the reaction precursors towards the produced AuNPs, providing a guide for the manipulation of nucleation and growth. The adaptation of this synthesis into the developed paper platform was tested and calibrated using different standard solutions with physiological concentrations of glucose. The response of the colorimetric signals obtained with this paper-based platform showed a linear behavior until 20 mM, required for glycemic control in diabetes, using the Red × Value/Grey feature combination as a calibration metric, to describe the variations in color intensity and hue in the spot test zone. The colorimetric sensor revealed a detection limit of 0.65 mM, depending on calibration metric and sensitivity of 0.013 AU/mM for a linear sensitivity range from 1.25 to 20 mM, with high specificity for the determination of glucose in complex standards with other common reducing interferents and human serum.
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Metheny, Norma A., Emily M. Gunn, Cynthia S. Rubbelke, Terrilynn Fox Quillen, Uthayashanker R. Ezekiel, and Kathleen L. Meert. "Effect of pH Test-Strip Characteristics on Accuracy of Readings." Critical Care Nurse 37, no. 3 (June 1, 2017): 50–58. http://dx.doi.org/10.4037/ccn2017199.

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BACKGROUND Little is known about characteristics of colorimetric pH test strips that are most likely to be associated with accurate interpretations in clinical situations. OBJECTIVES To compare the accuracy of 4 pH test strips with varying characteristics (ie, multiple vs single colorimetric squares per calibration, and differing calibration units [1.0 vs 0.5]). METHODS A convenience sample of 100 upper-level nursing students with normal color vision was recruited to evaluate the accuracy of the test strips. Six buffer solutions (pH range, 3.0 to 6.0) were used during the testing procedure. Each of the 100 participants performed 20 pH tests in random order, providing a total of 2000 readings. The sensitivity and specificity of each test strip was computed. In addition, the degree to which the test strips under- or overestimated the pH values was analyzed using descriptive statistics. RESULTS Our criterion for correct readings was an exact match with the pH buffer solution being evaluated. Although none of the test strips evaluated in our study was 100% accurate at all of the measured pH values, those with multiple squares per pH calibration were clearly superior overall to those with a single test square. CONCLUSIONS Test strips with multiple squares per calibration were associated with greater overall accuracy than test strips with a single square per calibration. However, because variable degrees of error were observed in all of the test strips, use of a pH meter is recommended when precise readings are crucial.
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Dissertations / Theses on the topic "Colorimetric calibration"

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Durand, Emmanuel. "Etudes de méthodes et outils pour la cohérence visuelle en réalité mixte appliquée au patrimoine." Thesis, Paris, ENSAM, 2013. http://www.theses.fr/2013ENAM0043/document.

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Le travail présenté dans ce mémoire a pour cadre le dispositif de réalité mixte ray-on, conçu par la société on-situ. Ce dispositif, dédié à la mise en valeur du patrimoine architectural et en particulier d'édifices historiques, est installé sur le lieu de l'édifice et propose à l'utilisateur une vision uchronique de celui-ci. Le parti pris étant celui du photo-réalisme, deux pistes ont été suivies : l'amélioration du mélange réel virtuel par la reproduction de l'éclairage réel sur les objets virtuels, et la mise en place d'une méthode de segmentation d'image résiliente aux changements lumineux.Pour la reproduction de l'éclairage, une méthode de rendu basé-image est utilisée et associée à une capture haute dynamique de l'environnement lumineux. Une attention particulière est portée pour que ces deux phases soient justes photométriquement et colorimétriquement. Pour évaluer la qualité de la chaîne de reproduction de l'éclairage, une scène test constituée d'une mire de couleur calibrée est mise en place, et capturée sous de multiples éclairages par un couple de caméra, l'une capturant une image de la mire, l'autre une image de l'environnement lumineux. L'image réelle est alors comparée au rendu virtuel de la même scène, éclairée par cette seconde image.La segmentation résiliente aux changements lumineux a été développée à partir d'une classe d'algorithmes de segmentation globale de l'image, considérant celle-ci comme un graphe où trouver la coupe minimale séparant l'arrière plan et l'avant plan. L'intervention manuelle nécessaire à ces algorithmes a été remplacée par une pré-segmentation de moindre qualité à partir d'une carte de profondeur, cette pré-segmentation étant alors utilisée comme une graîne pour la segmentation finale
The work described in this report has as a target the mixed reality device ray-on, developed by the on-situ company. This device, dedicated to cultural heritage and specifically architectural heritage, is meant to be installed on-site and shows the user an uchronic view of its surroundings. As the chosen stance is to display photo-realistic images, two trails were followed: the improvement of the real-virtual merging by reproducing accurately the real lighting on the virtual objects, and the development of a real-time segmentation method which is resilient to lighting changes.Regarding lighting reproduction, an image-based rendering method is used in addition to a high dynamic range capture of the lighting environment. The emphasis is put on the photometric and colorimetric correctness of these two steps. To measure the quality of the lighting reproduction chain, a test scene is set up with a calibrated color checker, captured by a camera while another camera is grabbing the lighting environment. The image of the real scene is then compared to the simulation of the same scene, enlightened by the light probe.Segmentation resilient to lighting changes is developed from a set of global image segmentation methods, which consider an image as a graph where a cut of minimal energy has to be found between the foreground and the background. These methods being semi-automatic, the manual part is replaced by a low resolution pre-segmentation based on the depthmap of the scene which is used as a seed for the final segmentation
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Heinz, Marcel. "Kalibrierverfahren und optimierte Bildverarbeitung für Multiprojektorsysteme." Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-129508.

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Gegenstand der vorliegenden Dissertation ist die Entwicklung von Kalibrierverfahren und Algorithmen zur Bildverarbeitung im Kontext von Multiprojektorsystemen mit dem Ziel, die Einsatzmöglichkeiten von derartigen Anlagen zu erweitern und die Nutzerakzeptanz solcher Systeme zu steigern. Die Arbeit konzentriert sich dabei insbesondere auf (annähernd) planare Mehrsegment-Projektionsanlagen, die aus preisgünstigen, nicht speziell für den Visualisierungbereich konzipierten Consumer- und Office-Projektoren aufgebaut werden. Im ersten Teil der Arbeit werden bestehende Verfahren zur geometrischen Kalibrierung, zum Edge-Blending sowie zur Helligkeits- und Farbanpassung auf ihre Eignung im Hinblick auf die Anforderungen untersucht und Erweiterungen entwickelt. Für die kamerabasierte Geometrie- Kalibrierung wird mit Lininenpattern gearbeitet, wobei ein effizienter rekursiver Algorithmus zur Berechnung der Schnittpunkte bei leicht gekrümmten Oberflächen vorgestellt wird. Für das Edge-Blending wird ein generalisiertes Modell entwickelt, das mehrere bestehende Ansätze kombiniert und erweitert. Die vorgenommene Modifikation der Distanzfunktion erlaubt insbesondere die bessere Steuerung des Helligkeitsverlaufs und ermöglicht weichere Übergänge an den Grenzen der Überlappungszonen. Es wird weiterhin gezeigt, dass das Edge-Blending mit bestehenden Ansätzen zum Ausgleich der Helligkeitsunterschiede wie Luminance Attenutation Maps kombiniert werden kann. Für die photometrische Kalibrierung ist die Kenntnis der Farb-Transferfunktion, also der Abbildung der Eingabe-Farbwerte auf die tatsächlich vom Projektor erzeugten Ausgaben, unerlässlich. Die herkömmlichen Ansätze betrachten dabei vorwiegend RGB-Projektoren, bei denen die dreidimensionale Transferfunktion in drei eindimensionale Funktionen für jeden Farbkanal zerlegt werden kann. Diese Annahme trifft jedoch auf die betrachteten Projektoren meist nicht zu. Insbesondere DLP-Projektoren mit Farbrad verfügen oft über zusätzliche Grundfarben, so dass der Farbraum deutlich von einem idealen RGB-Modell abweicht. In dieser Arbeit wird zunächst ein empirisches Modell einer Transferfunktion vorgestellt, das sich für derartige Projektoren besser eignet, allerdings die Helligkeit der Projektoren nicht vollständig ausnutzt. Im zweiten Teil der Arbeit wird ein kamerabasiertes Messverfahren entwickelt, mit dem direkt die dreidimensionale Farb-Transferfunktion ermittelt werden kann. Gegenüber bestehenden Verfahren werden tausende von Farbsamples gleichzeitig erfasst, so dass die erreichbare Sampledichte unter praxisrelevanten Messbedingungen von 17x17x17 auf 64x64x64 erhöht und damit die Qualität der photometrischen Kalibrierung signifikant gesteigert werden kann. Weiterhin wird ein Schnellverfahren entwickelt, dass die Messungsdauer bei 17x17x17 Samples von mehreren Stunden mit bisherigen Verfahren auf weniger als 30 Minuten reduziert. Im dritten Teil werden Algorithmen zur effizienten Bildverarbeitung entwickelt, die der GPU-basierten Anwendung der Kalibrierparameter auf die darzustellenden Bilddaten in Echtzeit dienen. Dabei werden die Möglichkeiten zur Vermeidung redundanter Berechnungsschritte beim Einsatz Stereoskopie-fähiger Projektoren ausgenutzt. Weiterhin wird das eigentliche Kalibrierverfahren effizient mit Verfahren zur Konvertierung von stereoskopischen Bildverfahren kombiniert. Es wird gezeigt, dass ein einzelner PC aus Standardkomponenten zur Ansteuerung einer Mehrsegment-Projektionsanlage mit bis zu 6 Projektoren ausreicht. Die Verwendung von DVI-Capture-Karten ermöglicht dabei den Betrieb einer solchen Anlage wie einen "großen Monitor" für beliebige Applikationen und Betriebssysteme.
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Tourasse, Guillaume. "Mesure et Analyse Statistique Tout Temps du Spectre du Rayonnement Solaire." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSET014/document.

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Ce document présente la mise en place d’un système de mesure des éclairements énergétiques spectraux solaires pour tout type de temps, sur 4 plans. Les 4 spectromètres mesurent au total 900 spectres/min et produisent chacun un spectre/min moyen et son écart type. Entre 2014 et 2015, 700 000 spectres ont été enregistrés sur un domaine compris entre 400 et 1000 nm avec un pas ≤1 nm. Un échantillon de 145 000 spectres représentatifs du climat lyonnais a été sélectionné pour une analyse statistique. Pour ce faire, l’échantillon a été réduit par partitionnement à 1175 spectres. Son domaine spectral a été étendu de 280 à 1500 nm à l’aide du RTM SMARTS. Une ACP de cet échantillon extrapolé a permis d’en réduire la description à 3 composantes et ainsi de réviser le modèle des illuminants D de la CIE. Enfin, la relation entre composition spectrale et paramètres environnementaux ou colorimétriques ouvre une voie vers des modèles statistiques de génération de spectres du rayonnement solaire
This manuscript presents the design and setup of an all-weather spectral irradiance measurement system on 4 planes. The 4 spectrometers measure a total of 900 spectra/min to produce every minute, a mean spectral irradiance and its standard deviation. Between 2014 and 2015, this system recorded 700,000 spectra, for wavelengths ranging between 400 and 1,000 nm with a step ≤1 nm. A sample of 145,000 spectra representative of the Lyon climate was selected for statistical analysis. For this purpose, the sample was reduced in size by partitioning it in 1,175 spectra. Its spectral domain was extended to 280-1,500 nm by extrapolating the spectra with curve fitting using the SMARTS2 RTM. A PCA of the extrapolated sample reduced its description to only 3 components; hence, allowing a revision of the CIE’s illuminant D series. Finally, the relation between spectral power distribution and environmental or colorimetric parameters opens a way towards statistical models for generating solar spectra
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Books on the topic "Colorimetric calibration"

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Porter, Louis G. Final evaluation of a color calibrator for a radar remote weather display system / Louis G. Porter ; sponsored by Federal Aviation Administration, U.S. Department of Transportation. [Washington, D.C.]: U.S. Dept. of Commerce, National Bureau of Standards, 1986.

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Book chapters on the topic "Colorimetric calibration"

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Lucas, Laurent, Céline Loscos, and Yannick Remion. "Camera Calibration: Geometric and Colorimetric Correction." In 3D Video, 91–112. Hoboken, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118761915.ch5.

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Post, David L. "Colorimetric Measurement, Calibration, and Characterization of Self-Luminous Displays." In Color in Electronic Displays, 299–312. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4757-9754-1_11.

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Bal, Artur, Andrzej Kordecki, Henryk Palus, and Mariusz Frąckiewicz. "Evaluating of Selected Systems for Colorimetric Calibration of LCD Monitors." In Advances in Intelligent Systems and Computing, 329–39. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-23437-3_28.

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Conference papers on the topic "Colorimetric calibration"

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Rolleston, Robert J. "Visualization of colorimetric calibration." In IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, edited by Jan Bares. SPIE, 1993. http://dx.doi.org/10.1117/12.146271.

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Hung, Po-Chieh. "Colorimetric calibration for scanners and media." In Electronic Imaging '91, San Jose,CA, edited by Winchyi Chang and James R. Milch. SPIE, 1991. http://dx.doi.org/10.1117/12.45355.

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Zhang, Ying, Jindong Fei, Yang Gao, and Jian Du. "Colorimetric calibration of coupled infrared simulation system." In Applied Optics and Photonics China (AOPC2015), edited by Haimei Gong, Nanjian Wu, Yang Ni, Weibiao Chen, and Jin Lu. SPIE, 2015. http://dx.doi.org/10.1117/12.2202722.

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Chen, Yaohong, Wei Liu, Zheyuan Fan, Long Ren, Bo Yi, Qingsheng Xie, and Chengpeng Duan. "Colorimetric pyrometry system design and calibration experiment." In The International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference (icPOE 2014), edited by Ailing Tian, Anand Asundi, Weiguo Liu, and Chunmin Zhang. SPIE, 2015. http://dx.doi.org/10.1117/12.2075515.

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Chang, Gao-Wei, and Yung-Chang Chen. "Colorimetric calibration of CCD cameras for self-luminous images." In Asia Pacific Symposium on Optoelectronics '98, edited by Yusheng Tim Tsai, Teh-Ming Kung, and Jan Larsen. SPIE, 1998. http://dx.doi.org/10.1117/12.311094.

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Bala, Subhankar, Ekaterina Sirazitdinova, and Thomas M. Deserno. "Colorimetric calibration of wound photography with off-the-shelf devices." In SPIE Medical Imaging, edited by Matthew A. Kupinski and Robert M. Nishikawa. SPIE, 2017. http://dx.doi.org/10.1117/12.2254721.

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Kordecki, Andrzej, Artur Bal, and Henryk Palus. "A study of vignetting correction methods in camera colorimetric calibration." In Ninth International Conference on Machine Vision, edited by Antanas Verikas, Petia Radeva, Dmitry P. Nikolaev, Wei Zhang, and Jianhong Zhou. SPIE, 2017. http://dx.doi.org/10.1117/12.2268532.

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Hung, Po-Chieh. "Smooth colorimetric calibration technique utilizing the entire color gamut of CMYK printers." In IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, edited by Jan Bares. SPIE, 1994. http://dx.doi.org/10.1117/12.175316.

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Ostromoukhov, Victor, Roger D. Hersch, Cecile Peraire, Isaac Amidror, and Patrick Emmel. "Two approaches in scanner-printer calibration: colorimetric space-based versus closed-loop." In IS&T/SPIE 1994 International Symposium on Electronic Imaging: Science and Technology, edited by Eric Walowit. SPIE, 1994. http://dx.doi.org/10.1117/12.173853.

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Ozeh, Samuel, A. G. Agwu Nnanna, and Justus C. Ndukaife. "Smartphone-Based Device for Monitoring Chemical Pollutants in Water." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86893.

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There remains a need for a cost-effective, sensitive and on-site analytical technique which requires minimal technical skills for monitoring chemical contaminants in water. This research work presents a smartphone-based colorimetric detection of trace chemical pollutants in water. Components of the Hue, Saturation and Value (HSV) color space within a global region of interest (ROI) of analytes’ image were utilized in developing an algorithm for the quantitative detection of target ions. Calibrations were conducted with Chromium (VI) and Nitrite analytes ranging between 0–250 ppb and 0–3000 ppb respectively. The calibration equation and coefficient of correlation as obtained were HS2 = −0.00918C+6.46003; R2 = 0.9997 and HS2 = −0.00584C+4.85119; R2 = 0.98228 respectively. The smartphone-based monitoring system was utilized to systematically obtain the concentration of target ions in arbitrary solutions. Limits of detection of the system for Nitrite and Chromium (VI) which are within USEPA specification were approximately 285 ppb and 16 ppb respectively. Appreciable agreements between conventional and proposed techniques were obtained with a maximum percentage difference of 8.21% in the concentration of an arbitrary sample.
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