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Hello fellow investigators

I have two questions about optical illusions

1) A photo mosaic is something like this http://i.stack.imgur.com/Pzplp.png

What are the optical principles behind our eye merging the many tiny images into a large coherent one?

2)Are there etiological explanations of optical illusions in general - by this I mean can it be explained why image inputs get parsed in 'wrong' ways by the eye/brain, why does the parser get confused (I suspect it is because the eye has parsing parameters like we cannot see UV light - is there a list of those somewhere?)

Thanks for your time

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closed as too localized by Mad Scientist Jul 20 '12 at 16:44

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

You've posted a nearly identical question on DSP, please don't cross-post to multiple SE sites simultaneously. –  Mad Scientist Jul 20 '12 at 16:44
This question isn't even that good of a fit for DSP or bio.SE, it belongs on cogsci.SE. However, you should still avoid cross-posting. –  Artem Kaznatcheev Jul 22 '12 at 5:13
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