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The free iPhone/Android app Chromatic Vision Simulator mimics all 3 forms of color deficiency and allows you to apply a percentage of deficit to photos or live camera input.


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Probably. What you mentioned in your question is called retinotopy. There is a mapping between locations on your retina and areas on your cortex. As you go further up the visual processing streams, the mapping gets more complex and the patterns would be less obvious. Here's an image of from a 1988 paper in the Journal of Neuroscience (Tootell, et al.). It ...


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There are many transformations between the light hitting your retina and your perception of the world. The signals from your retina initially travel through the visual pathways to reach your visual cortex, where visual information is processed. The representation of this visual information in your brain is also shaped by other brain activity representing ...


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It is not the case that the brain flips the retinal image, nor does it have to, nor are there any images in the brain like there are on the retina. It is just as meaningless to say that the retinal image is upside down in relation to the orientation of our perceptions. Richard L. Gregory gives a nice explanation: It is generally accepted that this does ...


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This isn't exactly what you are referring to, but I think provides a similar function and has been shown in vertebrate vision: https://en.wikipedia.org/wiki/Normalization_model Divisive normalization as a canonical computation across the brain While this does not implement histogram equalization, I think it is actually a better-suited explanation of the ...



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