Appendix A. Vision and Image Representation

A.1 The human eye
A.2 A cross section of the retina
A.3 Distribution of rods (dark red) and cones (blue) on the retina
A.4 Sensitivity of the three categories of cones
A.5 The visible spectrum (traditional view)
A.6 The visible spectrum in the electromagnetic spectrum
A.7 A test of color blindness
A.8 Another test of color blindness
A.9 The traditional color rainbow
A.10 The rainbow as seen by a person with protonopia
A.11 The rainbow as seen by a person with deuteranopia
A.12 The rainbow as seen by a person with tritanopia
A.13 The rainbow as seen by a person with monochromacy
A.14 Adelson's checker-shadow illusion
A.15 Demystifying the illusion
A.16 The scintillating grid illusion
A.17 An ambiguous illusion
A.18 The café wall illusion: a distorting illusion
A.19 Fraser's spiral: another distorting illusion
A.20 Penrose's triangle: a paradox illusion
A.21 Impossible stairs: another paradox illusion
A.22 The blivet: yet another paradox illusion
A.26 The CIE chromaticity diagram
A.27 An image with continuous color variation
A.28 The same image reduced to 256 colors
A.29 Decomposition of light by refraction
A.30 Direct light propagation in a droplet
A.31 Indirect light propagation in a droplet
A.32 Propagation of light rays and reflexion and refraction in cloud droplets
A.33 Color by interference on a shell and a black perl
A.34 Color by interference on a peacock's tail
A.35 Color by diffraction on a spider web
A.36 The additive model
A.36 XCF file of the preceding illustration
A.37 The RGB cube
A.38 Decomposition into the RGB channels
A.39 The subtractive model
A.40 The CMY cube
A.41 Decomposition into the CMY channels
A.42 Decomposition into the CMYK channels
A.43 The HSV model
A.44 Decomposition into the HSV channels: From the top left, you see the original image, and its H, S, and V channels.
A.45 The HSV model in the RGB cube

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