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Chapter 16
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Figure 16.1 The Mach band illusion. Top of figure: the visual stimulus with various center-surround receptive fields superimposed. Bottom of figure: the actual brightness of the visual stimulus (black solid line) and the perceived brightness of the optical illusion (blue dotted line).
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Figure 16.2 The brightness ramp stimulus used as visual input. 3
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Figure 16.3 The brightness values in a slice through the ramp stimulus shown in Figure 10.2. 4
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5. Figure 16.4 A 5×5 Mexican hat spatial filter.
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Figure 16.5 The Mach band illusion generated using the Mexican hat filter on the ramp input. 6
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Figure 16.6 A Gabor function modeling the oriented receptive field of a V1 neuron. 7
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