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how to draw circles on a image for pixel count?

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Dhandapani.S on 22 Jan 2015
Commented: Image Analyst on 23 Jan 2015
Sorry again. below is the image circ.png.
First i have to find the center(x,y) of the png image. using the center(x,y) of the png image file, i have draw a several circles with increasing radius until it covers the entire png image. the center of the circle should be at center of the png image. after drawing the circles, i have to count number of pixels in each circle. please help me in this regard.thanks in advance.
Image Analyst
Image Analyst on 23 Jan 2015
I'm certain my solution would also work on the scriblings image here.

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