R component pixel extraction

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Chandra Shekhar
Chandra Shekhar 2012-9-27
i have equation R(x,y)=sqrt(x^2 + y^2)..so i need to compute this equation. x and y are individual pixels from color R. please help me any one ..thank you.
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Ryan
Ryan 2012-9-27
编辑：Ryan 2012-9-27
What exactly are you trying to do? Are you trying to draw a circle? Are you trying to perform a process on an image? On two vectors? Are you trying to extract that "red" channel from an image?
Image Analyst
Image Analyst 2012-9-27
Beats me. Definitely needs clarification. If they're trying to do something with circles, perhaps the Circle FAQ will help.

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