reading image in circle area

edited April 2016 in Questions about Code

Hi. i'm finding a way to read image in a circle area. I'm working with pixels from image and using their RGB values to create sound. In this moment i need to find some way how to read only some circle area from that image. I asked uncle Google, but i didn't find anything what worked for me. I found something with a function dist() and mouse position, but i don't know how to use it. Sorry, if my english is bad, i'm learning it.



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