45 lines
1.3 KiB
TeX
45 lines
1.3 KiB
TeX
\documentclass[a4paper,12pt,pdftex]{exam}
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\newcommand{\ptitle}{Image statistics}
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\input{../header.tex}
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\firstpagefooter{Supervisor: Jan Benda}{phone: 29 74573}%
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{email: jan.benda@uni-tuebingen.de}
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\begin{document}
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\input{../instructions.tex}
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%%%%%%%%%%%%%% Questions %%%%%%%%%%%%%%%%%%%%%%%%%
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In you zip file you find a natural image called {\tt natimg.jpg}.
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\begin{questions}
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\question Load the image and extract all pixels as three dimensional
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vectors (red, green, and blue channel).
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\question Perform a principal component analysis on these
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three-dimensional vectors.
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\question Try to find an interpretation of the principal components
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you find in terms of colors. Find a good way to visualize this.
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\question What could be the biological significance of that (\cite{BG} can
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give you a clue)?
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\question How could you transform the picture to match the true
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representation in the retina (S-, M-, L- cones)?
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\end{questions}
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\begin{thebibliography}{1}
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\bibitem{BG} Buchsbaum, G., \& Gottschalk, A. (1983). Trichromacy,
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opponent colours coding and optimum colour information transmission
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in the retina. Proceedings of the Royal Society of London B. Royal
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Society (Great Britain), 220(1218), 89–113.
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\end{thebibliography}
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\end{document}
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