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Eigen-birds: Exploring avian morphospace with image analytictools
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
2012 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The plumage colour and patterns of birds have interested biologists for a long time.Why are some bird species all black while others have a multitude of colours? Does ithave anything to do with sexual selection, predator avoidance or social signalling?Many questions such as these have been asked and as many hypotheses about thefunctional role of the plumage have been formed. The problem, however, has been toprove any of these. To test these hypotheses you need to analyse the bird plumagesand today such analyses are still rather subjective. Meaning the results could varydepending on the individual performing the analysis. Another problem that stemsfrom this subjectiveness is that it is difficult to make quantitative measurements of theplumage colours. Quantitative measurements would be very useful since they couldbe related to other statistical data like speciation rates, sexual selection and ecologicaldata. This thesis aims to assist biologists with the analysis and measurement of birdplumages by developing a MATLAB toolbox for this purpose. The result is a wellstructured and user friendly toolbox that contains functions for segmenting, resizing,filtering and warping, all used to prepare the images for analysis. It also containsfunctions for the actual analysis such as basic statistical measurements, principalcomponent analysis and eigenvector projection.

Place, publisher, year, edition, pages
2012. , 61 p.
UPTEC F, ISSN 1401-5757 ; 12024
Keyword [en]
image analysis, eigen-birds, eigen, principal component analysis, pca, birds, avian, warping, biharmonic splines, affine transformation
National Category
Other Computer and Information Science
URN: urn:nbn:se:uu:diva-179494OAI: diva2:544932
Educational program
Master Programme in Engineering Physics
Available from: 2012-08-24 Created: 2012-08-16 Last updated: 2012-08-24Bibliographically approved

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