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how can i generate a circle function?

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Shasha Glow
Shasha Glow 2013-12-4
评论： Shasha Glow 2013-12-10
Now i have an image in binary form. Using blob index i have cropped it. Next i have to form a circle on the image and from the circle i have to come out with pixel values information. So how can i generate a circle function for this?

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Image Analyst
Image Analyst 2013-12-4

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Shasha Glow
Shasha Glow 2013-12-10
Actually i want to create the circle on BINARY IMAGE. Where the circle can be adjustable means it must be able to become small or big.
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Image Analyst
Image Analyst 2013-12-10
Try imellipse(). Let me know if you need a demo other than the one in the help.

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