Relevant bibliographies by topics / Morphometrics

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

Academic literature on the topic 'Morphometrics'

Author: Grafiati
Published: 4 June 2021
Last updated: 29 January 2023

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Journal articles on the topic "Morphometrics"

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Parés-Casanova, Pere Miquel, Arcesio Salamanca-Carreño, René Alejandro Crosby-Granados, and Jannet Bentez-Molano. "A Comparison of Traditional and Geometric Morphometric Techniques for the Study of Basicranial Morphology in Horses: A Case Study of the Araucanian Horse from Colombia." Animals 10, no. 1 (January 10, 2020): 118. http://dx.doi.org/10.3390/ani10010118.

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Skull size and shape have been widely used to study domestic animal populations and breeds. Although several techniques have been proposed to quantify cranial form, few attempts have been made to compare the results obtained by different techniques. While linear morphometrics has traditionally been used in breed characterization, recent advances in geometric morphometrics have created new techniques for specifically quantifying shape and size. The objective of this study was to compare two morphometric methods for their ability to describe external morphology. For this purpose, 20 skull specimens of adult male Araucanian horses were examined. Two age categories were established (the “mature group”, M3 not fully erupted to moderately worn, n = 7; and the “senile group”, M3 totally erupted and highly worn, n = 13). Both methods showed that there were statistical differences between generations, but discrimination rates were different between methods with the geometric morphometric analysis obtaining a rate of 97.5%. Although linear morphometrics was found to be compatible with geometric morphometrics, the latter was better able to discriminate the two groups and it also provides more information on shape.
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Tripathy, Subodh Kumar. "Significance of Traditional and Advanced Morphometry to Fishery Science." Journal of Human, Earth, and Future 1, no. 3 (September 1, 2020): 153–66. http://dx.doi.org/10.28991/hef-2020-01-03-05.

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Morphometric characters of fishes are measurable or metric characters. Morphometrics is a more or less interwoven set of large statistical procedures to analyze variability in the size and shape of organisms. Morphometrics and phylogenetics of a species are combined to utilize existing phylogeny which addresses hypotheses of shape change through evolutionary time. Morphometric differences among stocks of a species are recognized as important to evaluate population structure and form a basis to identify stocks. Advancements in morphometrics used powerful tools for testing and displaying differences in shape, isolated shape from size variation and identifying stocks of species with unique morphological characteristics enabling better management of the species. Traditional or standard morphometry has been improvised from time to time with advanced methods by technological advancements like geometric morphometrics, image analysis, principal component analysis, truss network analysis and multivariate analysis as well as many more to update knowledge and get more accurate information. These advanced methods have strengthened earlier technologies to improve upgrade fishery research throughout the globe. Doi: 10.28991/HEF-2020-01-03-05 Full Text: PDF
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Nunes, Lorena A., Edilson D. de Araújo, Luis C. Marchini, and Augusta C. de C. C. Moreti. "Variation morphogeometrics of Africanized honey bees (Apis mellifera) in Brazil." Iheringia. Série Zoologia 102, no. 3 (September 11, 2012): 321–26. http://dx.doi.org/10.1590/s0073-47212012005000002.

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The morphometrics of the honey bee Apis mellifera L., 1758 has been widely studied mainly because this species has great ecological importance, high adaptation capacity, wide distribution and capacity to effectively adapt to different regions. The current study aimed to investigate the morphometric variations of wings and pollen baskets of honey bees Apis mellifera scutellata Lepeletier, 1836 from the five regions in Brazil. We used geometric morphometrics to identify the existence of patterns of variations of shape and size in Africanized honey bees in Brazil 16 years after the classic study with this species, allowing a temporal and spatial comparative analysis using new technological resources to assess morphometrical data. Samples were collected in 14 locations in Brazil, covering the five geographical regions of the country. The shape analysis and multivariate analyses of the wing allowed to observe that there is a geographical pattern among the population of Apis mellifera in Brazil. The geographical variations may be attributed to the large territorial extension of the country in addition to the differences between the bioregions.
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Karhula, S. S., M. A. J. Finnilä, S. J. O. Rytky, D. M. Cooper, J. Thevenot, M. Valkealahti, K. P. H. Pritzker, et al. "Quantifying Subresolution 3D Morphology of Bone with Clinical Computed Tomography." Annals of Biomedical Engineering 48, no. 2 (October 3, 2019): 595–605. http://dx.doi.org/10.1007/s10439-019-02374-2.

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Abstract The aim of this study was to quantify sub-resolution trabecular bone morphometrics, which are also related to osteoarthritis (OA), from clinical resolution cone beam computed tomography (CBCT). Samples (n = 53) were harvested from human tibiae (N = 4) and femora (N = 7). Grey-level co-occurrence matrix (GLCM) texture and histogram-based parameters were calculated from CBCT imaged trabecular bone data, and compared with the morphometric parameters quantified from micro-computed tomography. As a reference for OA severity, histological sections were subjected to OARSI histopathological grading. GLCM and histogram parameters were correlated to bone morphometrics and OARSI individually. Furthermore, a statistical model of combined GLCM/histogram parameters was generated to estimate the bone morphometrics. Several individual histogram and GLCM parameters had strong associations with various bone morphometrics (|r| > 0.7). The most prominent correlation was observed between the histogram mean and bone volume fraction (r = 0.907). The statistical model combining GLCM and histogram-parameters resulted in even better association with bone volume fraction determined from CBCT data (adjusted R2 change = 0.047). Histopathology showed mainly moderate associations with bone morphometrics (|r| > 0.4). In conclusion, we demonstrated that GLCM- and histogram-based parameters from CBCT imaged trabecular bone (ex vivo) are associated with sub-resolution morphometrics. Our results suggest that sub-resolution morphometrics can be estimated from clinical CBCT images, associations becoming even stronger when combining histogram and GLCM-based parameters.
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O'Malley, Brian P., Joseph D. Schmitt, Jeremy P. Holden, and Brian C. Weidel. "Comparison of Specimen- and Image-Based Morphometrics for Cisco." Journal of Fish and Wildlife Management 12, no. 1 (November 23, 2020): 208–15. http://dx.doi.org/10.3996/jfwm-20-029.

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Abstract Morphometric data from fish are typically generated using one of two methods: direct measurements made on a specimen or extraction of distances from a digital picture. We compared data on 12 morphometrics collected with these two methods on the same collection of Cisco Coregonus artedi from Lake Ontario, North America, to assess the degree of bias in measurements made directly on a specimen- vs. an image-based method. We also assessed the degree of reproducibility within the image-based method by evaluating the amount of variation between different analysts for each morphometric method. Our results indicate specific morphometrics may be more prone to bias across the two methods and between analysts. Four of 12 morphometrics evaluated showed significant deviation from a 1:1 relationship that would be expected if the imaged-based method produced accurate specimen-based measurements. Pelvic fin length and pelvic–anal fin distance had the highest between-analyst variation for image-based landmarks, indicating low reproducibility for these metrics, compared with pectoral fin or total length, which had lower between-analyst variation. Although some morphometric measurements can be accurately obtained with either method, and therefore potentially used interchangeably in studies on Cisco morphology, our findings highlight the importance of considering method bias in morphometric studies that use data collected by different methods.
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Bookstein, Fred. "Morphometrics." Math Horizons 3, no. 3 (February 1996): 28–31. http://dx.doi.org/10.1080/10724117.1996.11974967.

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Rohlf, F. James. "Morphometrics." Annual Review of Ecology and Systematics 21, no. 1 (November 1990): 299–316. http://dx.doi.org/10.1146/annurev.es.21.110190.001503.

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Abdollahi, Mohammad. "Analysis of Cyst and Cone Top Morphometrics of Indian Populations of Maize Cyst Nematode." Journal of Plant Protection Research 49, no. 1 (March 1, 2009): 41–48. http://dx.doi.org/10.2478/v10045-009-0006-4.

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Analysis of Cyst and Cone Top Morphometrics of Indian Populations of Maize Cyst NematodeHierarchical cluster analysis based on cyst and cone top morphometric means including cyst length, cyst width, cyst length to cyst width ratio, vulval slit length, vulval bridge length, vulval bridge breadth, under bridge breadth, length of fenestra, breadth of fenestra, distance from anus to fenestra and number of secondary bullae was used to learn more about cyst and cone top morphometric means and their relationships for six populations ofHeterodera zeaefrom Indore, Ludhiana, Delhi, Udaipur, Kanpur and Samastipur by using SPSS 13 for Windows computer software (SPSS Inc.). Values of proximity matrix based on cluster analysis of morphometrics and the dendrograms visually illustrated the grouping and relationships among populations. Intra specific variations in the different characters of the cone top structure revealed that Indore and Samastipur populations ofH. zeaewere different as compared to other ones ofH. zeae.Cluster analysis of cyst morphometrics showed that the populations ofH. zeaefrom Kanpur and Delhi were different as compare to other four ones.
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Martinet, Jean-Philippe, Hubert Ferté, Pacôme Sientzoff, Eva Krupa, Bruno Mathieu, and Jérôme Depaquit. "Wing Morphometrics of Aedes Mosquitoes from North-Eastern France." Insects 12, no. 4 (April 12, 2021): 341. http://dx.doi.org/10.3390/insects12040341.

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Background: In the context of the increasing circulation of arboviruses, a simple, fast and reliable identification method for mosquitoes is needed. Geometric morphometrics have proven useful for mosquito classification and have been used around the world on known vectors such as Aedes albopictus. Morphometrics applied on French indigenous mosquitoes would prove useful in the case of autochthonous outbreaks of arboviral diseases. Methods: We applied geometric morphometric analysis on six indigenous and invasive species of the Aedes genus in order to evaluate its efficiency for mosquito classification. Results: Six species of Aedes mosquitoes (Ae. albopictus, Ae. cantans, Ae. cinereus, Ae. sticticus, Ae. japonicus and Ae. rusticus) were successfully differentiated with Canonical Variate Analysis of the Procrustes dataset of superimposed coordinates of 18 wing landmarks. Conclusions: Geometric morphometrics are effective tools for the rapid, inexpensive and reliable classification of at least six species of the Aedes genus in France.
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Silva, Inês C., Stephen J. Hawkins, and José Paula. "A comparison of population differentiation in two shore crab species with contrasting distribution along the Portuguese coast, using two morphological methodologies." Marine and Freshwater Research 60, no. 8 (2009): 833. http://dx.doi.org/10.1071/mf08215.

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Along the Portuguese coast, Pachygrapsus marmoratus has a continuous distribution on rocky shores. In contrast, Carcinus maenas has a discontinuous distribution, inhabiting estuaries. Surveys along a coastal latitudinal gradient were made to assess the effect of the distribution pattern on population differentiation of these two species. Population differentiation was studied using two different morphometric methodologies: linear-based morphometrics and landmark-based morphometrics. The linear-based analysis revealed no significant morphological differentiation among the eleven P. marmoratus populations. Landmark-based analysis showed that the northern and central populations were more similar in shape than the southern populations. Nevertheless, there was still some overlap in shape that could be due to the continuous distribution of P. marmoratus along the coast, promoting population panmixia. In C. maenas, both morphometric techniques revealed the existence of morphological differentiation among populations. This shape differentiation showed a clinal variation, explained by a higher degree of isolation of populations that might be due to limited larval flow between them. Environmental factors may also play an important role in causing variation of shape. Landmark-based morphometrics yielded stronger evidence of morphological differences among forms than a linear approach, suggesting that this method may be more suitable for analysis of body shape.
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Dissertations / Theses on the topic "Morphometrics"

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Krey, Karl-Friedrich. "Untersuchungen zur Morphologie von dentofazialen und skelettalen Strukturen Erwachsener mit Methoden der geometrischen Morphometrie." Doctoral thesis, Universitätsbibliothek Leipzig, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-63908.

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Bibliographische Beschreibung: Krey, Karl-Friedrich Untersuchungen zur Morphologie von dentofazialen und skelettalen Strukturen Erwachsener mit Methoden der geometrischen Morphometrie Universität Leipzig, Habilitation 251 S., 319 Lit.,109 Abb., 93 Tab. Referat: Die kieferorthopädische Diagnostik beruht neben der klinischen Untersuchung auf der metrischen Auswertung (Streckenmessungen, Winkelmessungen, Verhältniszahlen) von standardisierten extraoralen Fotos, Fernröntgenseitbildern und Modellen der Kiefer. Diese Verfahren werden denen der klassischen Morphometrie zugerechnet. In den letzen Jahren hat sich eine Vielfalt neuer Verfahren zur Analyse von biologischen Formen etabliert. Diese geometrische Morphometrie kann als Synthese multivariater statistischer Analysen kartesischer Koordinaten angesehen werden. Sie stellt eine effiziente, alle Eigenschaften von geometrischen Unterräumen abbildende Methode zur Beschreibung biologischer Formen unter Beibehaltung aller räumlichen Beziehungen dar. In der vorliegenden Untersuchung wurden diese Methoden umfassend auf die Befunde von erwachsenen Kaukasiern angewendet. Es handelte sich dabei um 179 extraorale Fotos jeweils en face und im Profil, 463 Fernröntgenseitbilder und 242 Modelle kieferorthopädisch unbehandelter Erwachsener. Ziel war es, mit den Methoden der geometrischen Morphometrie anhand dieser Befunde die Form, Größe und deren Variabilität in Abhängigkeit vom Geschlecht und Klassifikationen der klassischen Morphometrie zu beschreiben, und damit grundlegende Daten für die Etablierung dieser Verfahren in der Kieferorthopädie bereitzustellen. Für die untersuchten dentofazialen Strukturen konnten mit sexuellem Dimorphismus einhergehende Größenunterschiede festgestellt und in Abhängigkeit von bestimmten skelettalen Konfigurationen erstmals differenziert und quantifiziert werden. Die Betrachtung der Form des Gesichtes, repräsentiert durch die extraoralen Fotos, zeigte charakteristische geschlechtsspezifische Veränderungen sowie Eigenschaften, die nicht mit der Konfiguration der entsprechenden skelettalen Strukturen korrelierten. In der Analyse der Fernröntgenseitbilder konnten Veränderungen der vertikalen Dimension als ein für die Form bestimmender Faktor identifiziert werden. Auch für die untersuchten Modelle konnten in der Stichprobe die Varianz bestimmende Faktoren isoliert werden. Der gewählte mathematisch-statistische Ansatz ermöglichte die Beschreibung unterschiedlicher (zwei- und dreidimensionaler) Strukturen mit einem einheitlichen Repertoire an Verfahren. Es konnte gezeigt werden, dass die angewendeten Methoden in der Lage sind, die dentofaziale und skelettale Morphologie adäquat und vollständig numerisch und visuell zu beschreiben sowie klinisch relevante Fragestellungen zu beantworten.
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Plomp, Kimberly Anne. "Quantifying palaeopathology using geometric morphometrics." Thesis, Durham University, 2013. http://etheses.dur.ac.uk/6962/.

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Palaeopathology is the study of disease and injury in archaeological bone. Traditional methods rely heavily on macroscopic description which can have a high degree of subjectivity and error, as well as limiting the types of research questions possible. Geometric morphometrics are a suite of shape analysis techniques and provide an opportunity to investigate possible relationships between skeletal morphological variation and disease. This thesis aims to demonstrate the potential of applying these methods in palaeopathological research and the results illustrate the benefits of using quantifiable and objective shape analysis methods in palaeopathology. The first half of the thesis discusses the use of geometric morphometrics to investigate skeletal variation to identify possible aetiological factors in the development of Schmorl's nodes and osteoarthritis. There was a strong association found between vertebral morphology and Schmorl's nodes in the lower spine. These findings have great implications for both bioarchaeological interpretation and clinical understanding of the aetiology and pathogenesis of Schmorl's nodes. Joint morphology of the proximal ulna and distal humerus was found to have no identifiable relationship with osteoarthritis, indicating that joint morphology is not a predisposing factor in elbow osteoarthritis, nor does osteoarthritis deform the joints in a systematic manner. A tentative relationship between eburnation and knee joint morphology was identified, although these results need to be verified with future research. If the association can be supported, shape analyses may provide a way for clinicians to monitor the progression of the disease. Geometric morphometrics were also shown to objectively record pathological shape deformation resulting from leprosy and residual rickets. The ability to objectively describe lesions with quantified data will greatly strengthen palaeopathology by decreasing the subjectivity and error inherent in macroscopic based methods. This thesis represents promising groundwork for the incorporation of geometric morphometrics into palaeopathological research.
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Turner, Jennifer. "Wide-field anterior ocular surface morphometrics." Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/25655/.

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The current understanding of anterior eye shape in humans is limited due to available technology and its accessibility. Accurate curvature metrics of specific areas of the peripheral cornea, corneo-limbal junction and anterior sclera have remained obscured by the limits of the palpebral aperture, since the upper and lower eyelids cover most of the vertical aspect. This thesis starts by comparing the ‘gold standard’ keratometry measurements to commonly used topographic systems. Keratometric analogues were found to be significantly different and in addition provided spurious vertical anterior ocular surface (AOS) profiles. These findings revealed a need to establish an accurate model. Magnetic resonance imaging (MRI) potentially offers the best opportunity to image the entire AOS structure. However, preliminary studies in this thesis demonstrated that the use of a 3-Tesla MRI scanner was unable to obtain sufficiently resolute data to meet requirements. As an alternative, ocular impression taking techniques were adopted during the remainder of this work to acquire the AOS data. Eye casts from impression moulds were scanned using active laser triangulation and virtual 3-dimensional surfaces rendered. Further investigations defined the most suitable material for impression taking and the amount of deformation of the AOS caused by the procedure. The ocular impression casting and scanning process was examined for accuracy and reliability. This protocol was used to sample a population of normal white European eyes in order to establish a database and define wide-field AOS variability. Volumetric and 2-dimensional topographic profiles were extracted from the digital 3-dimensional representation obtained, allowing for the analysis of point-to-point curvature differences. For the first time, the entire AOS shape has been defined with known accuracy. In addition, effects of myopic refractive error and gender are presented. This data is of potential importance to ophthalmic surgeons, ocularists, contact lens practitioners, vision scientists and researchers, in the form of a digital archive of normal white European wide-field AOS topography as a reference source.
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Sharda, Gaurav VinodKumar. "Cerebral aneurysm morphometrics from 2D biplane angiograms." Thesis, University of Iowa, 2011. https://ir.uiowa.edu/etd/5058.

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Cerebral aneurysm is a local dilation in a blood vessel in brain that can rupture and cause hemorrhagic stroke. A study by International Study of Unruptured Intracranial Aneurysms (ISUIA) has collected a large database of bi-plane cerebral angiograms from patients who were followed longitudinally. This unique data may be mined for testing hypotheses on the role of morphology metrics in rupture risk. A method of reconstructing an approximate 3D geometry of aneurysms from bi-plane angiograms was developed using techniques in curve morphing. Aneurysms from a pilot population of 150 patients were reconstructed to assess the effectiveness of the proposed method. The aim of the research is to develop a methodology for 3D reconstruction of aneurysm surface from biplane angiograms, estimate size & shape characteristics, validate the method for 3D morphometric and compare these metric against the ones estimates based on radiologic measurements. The 3D methodology was developed and validated for the correctness of the developed method of surface reconstruction from biplane angiograms with good correlation coefficient values using a 10 patient data set. Then this method was applied on the 150 patient population studies for calculation of morphologic metric. The results showed that this method was better able to capture the shape characteristics of the aneurysm than the radiologists' way of approximating aneurysm as an ellipsoid formed from the three anatomical dimensions.
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Chiotakis, Christina. "Pliocene crocodilians of chinchilla: Identification using dental morphometrics." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/119219/1/Christina_Chiotakis_Thesis.pdf.

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The key research problem of this project was to identify Australian crocodilian species from isolated teeth, which make up the largest available fossil data set. Three-dimensional images of the teeth were created from computed tomography (CT) data and statistical comparisons allowed several extinct species to be distinguished from each other and from modern crocodiles. The research provides a new methodology for identifying crocodilian teeth, and potential for further usage of this methodology including identifying theropod dinosaurs and other species from isolated teeth.
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Dibble, Jacob Leonard. "Urban morphometrics : towards a quantitative science of urban form." Thesis, University of Strathclyde, 2016. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=27955.

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The field of Urban Morphology is a branch of academic research focussing on the study of urban form. Although prior works in this field had been undertaken earlier, the formal establishment of the discipline of Urban Morphology can be traced back to the establishment of the International Seminar on Urban Form in 1994, and the subsequent Journal of Urban Morphology. The efforts in this field are found to be largely reliant, from the point of view of methods and definitions, on two foundational research roots, the Conzenian and the Muratorian processes. Both of these dominant traditions emerged independently in the 1960’s. Contemporary works in the field are found to consistently uphold the status quo within the discipline and fail to challenge or validate the very definitions of form used so frequently and implicitly in all assessments. This thesis recognises that the field of Urban Morphology lacks a rigorous lexicon of the urban form, as well as a quantitatively-driven, systematic and comprehensive means of analysing and comparing urban form. A methodology is developed as a systematic, quantitative and comprehensive process of measuring,defining and classifying urban form. This process entails the study of the measurements of urban form and is termed Urban Morphometrics. Central to Urban Morphometrics is the assignment of rigorous definitions to the urban elements, called Constituent Urban Elements. A Methodology of measuring these elements and their inter-relationships at the scale of the Sanctuary Area is tested rigorously against Validation, Robustness and Universality criteria, and culminates in the first taxonomy of urban form. Largely following statistical processes of biological morphometrics, this analysis reveals the relative importance of the various measurements of urban form and derives a minimal set of criteria for measuring urban form. Urban Morphometrics is then integrated into a more typical study of Urban Morphology and later tested to reveal its relevance in professional planning practice. Finally, the classification of urban form is used as a platform for discussing the theory of Urban Evolution and the first bifurcation in the evolutionary pathways of cities, evidenced through the resulting classification of urban form.
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Grass, Andy Budd Ann F. "Examining ecosystem structure and disparity through time using geometric morphometrics." [Iowa City, Iowa] : University of Iowa, 2009. http://ir.uiowa.edu/etd/367.

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Woo, Johnathan. "Evaluating facial ontogeny of avian embryos using 3D geometric morphometrics." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50056.

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Objectives: In order to study abnormal facial development, reference standards of normal development are required. It is challenging to obtain 3D data on early embryos, since they are comprised of non-differentiated tissue. We used optical projection tomography (OPT) (Bioptonics, UK), which images transparent specimens with UV light. Here we used carefully staged chicken embryos to measure facial morphogenesis over time. Methods: Chicken eggs (n=32) were incubated for 3.5-6 days (stage 20, 24, 28, 29). Embryo heads were fixed in formaldehyde, embedded in agarose, dehydrated in methanol, and then cleared in Benzyl Alcohol Benzyl Benzoate. Embryos were scanned with the OPT, images were reconstructed, and then the head was digitally resliced in the frontal plane using NRecon and CTan. Resliced files were imported into Amira, facial prominences were outlined, and isosurfaces were created. Volumetric measurements were assessed using Amira. Landmarks were applied to the surface of each prominence using Landmark. These landmarks were then superimposed from different embryos using MorphoJ, whereby they underwent Procrustes superimposition, Principal Component Analysis, Canonical Variate Analysis, and Discriminant Function Analysis. Results: Traditional morphometrics revealed that the greatest amount of growth was a 24-fold difference in volume of the lateral nasal prominence between stages 20 and 29, followed by the maxillary, mandibular, and frontonasal mass. Geometric morphometrics revealed that embryonic facial prominences had minimal changes in shape between stages 20 and 24, however, after this time, there was more separation of the data in morphospace. Strikingly, the greatest morphological change was between stages 28 and 29, which was only 12 hours apart. This rapid change suggests that other mechanisms in addition to cell proliferation are involved. In addition, the data show that major morphological changes precede lip fusion. Therefore, we can pinpoint our studies to stage 28, when critical events in the mesenchyme are taking place. Conclusion: Embryonic chicken facial prominences undergo major shape changes. Each prominence varies in morphology with respective stage, with the frontonasal mass and mandibular prominence having the most dynamic shape changes.
Dentistry, Faculty of
Graduate
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Björkeson, Felix. "Autonomous Morphometrics using Depth Cameras for Object Classification and Identification." Thesis, Linköpings universitet, Datorseende, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-95240.

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Identification of individuals has been solved with many different solutions around the world, either using biometric data or external means of verification such as id cards or RFID tags. The advantage of using biometric measurements is that they are directly tied to the individual and are usually unalterable. Acquiring dependable measurements is however challenging when the individuals are uncooperative. A dependable system should be able to deal with this and produce reliable identifications. The system proposed in this thesis can autonomously classify uncooperative specimens from depth data. The data is acquired from a depth camera mounted in an uncontrolled environment, where it was allowed to continuously record for two weeks. This requires stable data extraction and normalization algorithms to produce good representations of the specimens. Robust descriptors can therefore be extracted from each sample of a specimen and together with different classification algorithms, the system can be trained or validated. Even with as many as 138 different classes the system achieves high recognition rates. Inspired by the research field of face recognition, the best classification algorithm, the method of fisherfaces, was able to accurately recognize 99.6% of the validation samples. Followed by two variations of the method of eigenfaces, achieving recognition rates of 98.8% and 97.9%. These results affirm that the capabilities of the system are adequate for a commercial implementation.
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Carpiaux, Weston. "GEOMETRIC MORPHOMETRICS CLUSTERS CRANIOFACIAL MORPHOLOGY DIFFERENTLY THAN TRADITIONAL CEPHALOMETRIC MEASUREMENTS." Master's thesis, Temple University Libraries, 2014. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/284644.

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Oral Biology
M.S.
Objectives: The purpose of the study was to compare a geometric morphometric approach for grouping different skeletal malocclusions to a traditional cephalometric approach for a subject population undergoing orthognathic surgery for treatment of malocclusion. Methods: Traditional cephalometric measurements were used to diagnose the skeletal malocclusion each subject in both the sagittal (SNA, SNB, ANB, Facial Angle) and vertical dimensions (SN-MP, FMA, Downs Y-Axis, Facial Axis, P-A Face Height). These were compared to skeletal diagnoses given by the treating surgeon. Lastly, geometric morphometrics was used to identify shape variance within the population, cluster homogeneous subsets, and identify variance between the clusters. Results: Traditional cephalometric analysis identified 21 Class II open, 18 Class II normal, 5 Class II deep, 3 Class I open, 4 Class I normal, 2 Class I deep, 2 Class III open, 4 Class III normal, 3 Class III deep. The surgeon identified 17 Class II open, 20 Class II normal, 13 Class II deep, 1 Class I open, 0 Class I normal, 0 Class I deep, 4 Class III open, 3 Class III normal, 4 Class III deep. Geometric morphometrics identified 6 clusters showing greatest variance through 1) vertical divergence, 2) sagittal positioning of the jaws, and 3) ramus height. Conclusion: Cephalometric analysis and a geometric morphometrics approaches to classification of malocclusion grouped subjects into distinct populations. However, the groupings did not agree between the two approaches.
Temple University--Theses
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Books on the topic "Morphometrics"

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Wahl, Christina Maria. Morphometrics. Rijeka, Croatia: Intech, 2012.

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Elewa, Ashraf M. T., ed. Morphometrics. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4.

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Hartemink, Alfred E., and Budiman Minasny, eds. Digital Soil Morphometrics. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-28295-4.

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Elewa, Ashraf M. T., ed. Morphometrics for Nonmorphometricians. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-95853-6.

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Marcus, Leslie F., Marco Corti, Anna Loy, Gavin J. P. Naylor, and Dennis E. Slice, eds. Advances in Morphometrics. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-9083-2.

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Morphometrics for nonmorphometricians. Berlin: Springer, 2010.

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Morphometrics with R. New York: Springer, 2008.

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de, Bruin R., ed. Paediatric morphometrics: A reference manual. Utrecht: Wetenschappelijke uitgeverij Bunge, 1996.

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Slice, Dennis E. Modern morphometrics in physical anthropology. New York: Kluwer, 2011.

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Drooger, Cornelis Willem. Radial foraminifera: Morphometrics and evolution. Amsterdam: North-Holland, 1993.

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Book chapters on the topic "Morphometrics"

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Elewa, Ashraf M. T. "Introduction." In Morphometrics, 1–5. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4_1.

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Rodrigues, Luis Azevedo, and Vanda Faria Santos. "Sauropod Tracks — a geometric morphometric study." In Morphometrics, 129–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4_10.

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Canudo, José I., and Gloria Cuenca-Bescós. "Morphometric approach to Titanosauriformes (Sauropoda, Dinosauria) femora: Implications to the paleobiogeographic analysis." In Morphometrics, 143–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4_11.

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Marugán-Lobón, Jesús, and Ángela D. Buscalioni. "Geometric morphometrics in macroevolution: morphological diversity of the skull in modern avian forms in contrast to some theropod dinosaurs." In Morphometrics, 157–73. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4_12.

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Korner-Nievergelt, Fränzi. "Correlation of foot sole morphology with locomotion behaviour and substrate use in four passerine genera." In Morphometrics, 175–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4_13.

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Polly, P. David, and Jason J. Head. "Maximum-likelihood identification of fossils: taxonomic identification of Quaternary marmots (Rodentia, Mammalia) and identification of vertebral position in the pipesnake Cylindrophis (Serpentes, Reptilia)." In Morphometrics, 197–221. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4_14.

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Pavlinov, Igor Y. "Geometric morphometrics of the upper antemolar row configuration in the brown-toothed shrews of the genus Sorex (Mammalia)." In Morphometrics, 223–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4_15.

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Bastir, Markus, and Antonio Rosas. "Geometric morphometrics in paleoanthropology: Mandibular shape variation, allometry, and the evolution of modern human skull morphology." In Morphometrics, 231–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4_16.

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Harvati, Katerina. "3-D geometric morphometric analysis of temporal bone landmarks in Neanderthals and modern humans." In Morphometrics, 245–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4_17.

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Elewa, Ashraf M. T. "Application of geometric morphometrics to the study of shape polymorphism in Eocene ostracodes from Egypt and Spain." In Morphometrics, 7–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08865-4_2.

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Conference papers on the topic "Morphometrics"

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Li, Bingjue, Andrew P. Murray, David H. Myszka, and Gérard Subsol. "Synthesizing Planar Rigid-Body Chains for Morphometric Applications." In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59412.

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Morphometrics is a quantitative analysis to compare a set of geometric representations of forms, including shape and size. Analysis of shape variation is useful in systematics, evolutionary biology, biostratigraphy, and developmental biology. Distinguished by the data being analyzed, three forms of morphometrics are commonly recognized. Traditional morphometrics measures the lengths, ratios, angles, etc., of patterns of shape variations. Outline-based morphometrics analyzes the outlines of forms using open or closed curves. Landmark-based geometric morphometrics summarizes shapes in terms of the coordinates of anatomical landmarks. The three morphometric methods are able to capture the variation of forms exactly, but require analyzing numerous variables. As an alternative approach to morphometrics, this paper presents a kinematic synthesis methodology of planar rigid-body chains. This methodology approximates the set of profile curves that represent a series of shapes with a single chain comprised of rigid-body links connected by revolute or prismatic joints. The primary advantage of the presented approach is that a modest number of physical parameters describes the shape and size change between a set of curves. Three morphometric problems are investigated by applying the methodology of synthesizing planar rigid-body chains to match the prescribed shapes. The result validates that the presented methodology might be used as an alternative approach to the analysis of morphological forms.
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Farrell, James L. "Morphometrics for Early Warning." In 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017). Institute of Navigation, 2017. http://dx.doi.org/10.33012/2017.15257.

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Tibbits, Matthew A. "THE MORPHOMETRICS OF PHENOTYPIC PLASTICITY." In 67th Annual Southeastern GSA Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018se-312174.

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Klingenberg, Chris. "Insect morphometrics: New developments and applications." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.93581.

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Däschinger, Melanie, Andreas Knote, and Sebastian von Mammen. "An evolutionary approach to behavioural morphometrics." In GECCO '17: Genetic and Evolutionary Computation Conference. New York, NY, USA: ACM, 2017. http://dx.doi.org/10.1145/3067695.3075966.

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Anderson, Lian, and Jennifer E. Bauer. "INVESTIGATING EUBLASTOID MORPHOLOGY THROUGH 3D GEOMETRIC MORPHOMETRICS." In Joint 56th Annual North-Central/ 71st Annual Southeastern Section Meeting - 2022. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022nc-375436.

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Slice, Dennis E., and Joel Stitzel. "Landmark-based Geometric Morphometrics and the Study of Allometry." In Digital Human Modeling for Design and Engineering Symposium. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2004. http://dx.doi.org/10.4271/2004-01-2181.

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Burkett, Ashley, Trenity Ford, and Erin Roark. "ONTOGENETIC MORPHOMETRICS OF CIBICIDOIDES WUELLERSTORFI OBSERVED THROUGH MICROCT SCANNING." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-378942.

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Tajika, Amane, Neil H. Landman, Kenji Ikuno, Naoki Morimoto, and Mariah Slovacek. "MORPHOMETRICS AND QUANTIFICATION OF INTRASPECIFIC VARIATION THROUGH ONTOGENY IN THE LATE CRETACEOUS NAUTILOID EUTREPHOCERAS USING LINEAR- AND GEOMETRIC MORPHOMETRIC APPROACHES." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-337144.

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Baur, Hannes. "Morphometrics and the description of cryptic species in the Chalcidoidea." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.93130.

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Reports on the topic "Morphometrics"

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Bradtmiller, Bruce, Sherri Upchurch-Blackwell, Henry W. Case, Thomas D. Churchhill, and Daniel N. Mountjoy. Human Morphometrics, Motion, and Performance Research. Fort Belvoir, VA: Defense Technical Information Center, June 1994. http://dx.doi.org/10.21236/ada320080.

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Sachs, Paige. Comparative Vector Bionomics and Morphometrics of Two Genetically Distinct Field Populations of Anopheles darlingi Root from Belize, Central America and Zungarococha, Peru, South America. Fort Belvoir, VA: Defense Technical Information Center, January 2014. http://dx.doi.org/10.21236/ad1012860.

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Houech, Intesar-Victoria, and Dora Konstantinova Zlatareva. 3T Magnetic Resonance Morphometric Study of the Neurohypophysis in Bulgarian Population. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, August 2021. http://dx.doi.org/10.7546/crabs.2021.08.13.

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Allen, Tom, Luca Taraborelli, and Robyn Grant. Morphometric Analysis to Determine How the Shape of Tennis Rackets has Developed. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317470.

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Norton, William N. Acute Exposure of Medaka to Carcinogens: An Ultrastructural, Cytochemical and Morphometric Analysis of Liver and Kidney. Fort Belvoir, VA: Defense Technical Information Center, February 1991. http://dx.doi.org/10.21236/ada242950.

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Collins, Charles M. Morphometric Analyses of Recent Channel Changes on the Aanana River in the Vicinity of Fairbanks, Alaska. Fort Belvoir, VA: Defense Technical Information Center, June 1990. http://dx.doi.org/10.21236/ada229511.

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Baker, William H., David R. Mattie, and Kathleen L. MacMahon. Effects of Ammonium Perchlorate Exposure in Pregnant Rats: A Morphometric Analysis of the Thyroid Gland of Rat Pups. Fort Belvoir, VA: Defense Technical Information Center, December 1998. http://dx.doi.org/10.21236/ada453097.

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Tsybekmitova, G. Ts, L. D. Radnaeva, N. A. Tashlykova, V. G. Shiretorova, A. K. Tulokhonov, B. B. Bazarova, and M. O. Matveeva. THE EFFECT OF CLIMATIC SHIFTS ON BIODIVERSITY OF PHYTOCENOSIS: LAKE ARAKHLEY (EASTERN SIBERIA, RUSSIA). DOICODE, 2020. http://dx.doi.org/10.18411/0973-7308-2020-35-3-77-90.

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Lake Arakhley is located within the Lake Baikal basin in Eastern Siberia, Russia. The area is characterized by continental subarctic climate with considerate diurnal temperature range, long cold dry winters and short hot summers with more precipitation occurring during the latter half of the summer. Climatic shifts in high water years and low water years result in morphometric changes in the lake and in the chemical and physical parameters of the ecosystem. During low water years, concentrations of ammonium nitrogen and nitrite nitrogen are decreased, whereas nitrate concentration increases. High water years feature average concentrations of ammonium ions 1.5–2 times higher than the values of recent dry years. Redundancy analysis (RDA) of abiotic factors and biotic community indicated that the community structure shows the greatest correlation with physical and chemical parameters of water and biogenic elements (nitrites, ammonium, phosphates) along the first axis, and with the lake depth and transparency along the second axis. Changes in abiotic factors induce functioning and formation of characteristic communities of the primary producers in the trophic structure of the ecosystem. During low water years, with increased level of autochthonous organic matter, Lindavia comta dominance is observed, while during high water years, with increased allochthonous organic matter Asterionella formosa appeared as dominant. Currently, during low water years, the hydrophytes community is monodominant and composed of Ceratophyllum demersum. Meanwhile, such species indicating eutrophic conditions as Myriophyllum sibiricum, Potamogeton pectinatus are found in the lake vegetation.
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