image segmentation

2011 3 7
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Hey, Im trying to segment out a polygon region out of an image. I have already got the boundary pixels . Can you please help me in finding out the pixel values inside the boundary.
Thank You

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Sean de Wolski
Sean de Wolski 2011-3-7

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Okay, use IMFILL or POLY2MASK to generate a logical mask and then multiply it by the image to preserve the content inside the mask. I.e.
For grayscale images:
Imasked = I.*cast(Mask,class(I));
or for RGB images:
Imasked = bsxfun(@times,I,cast(Mask,class(I)));

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Gaurav Kaila
Gaurav Kaila 2011-3-7

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Thanks For Replying, but i have already tried these functions. What i need is , that image part that i am segmenting out, is displayed as an image itself with its original data inside it.
Like when we crop an image, the original data of the cropped image remains in it.
Gaurav Kaila
Gaurav Kaila 2011-3-7

0 个投票

Thanks a Lot, I am very new to MATLAB, can you please elaborate on this answer a little more.
Thanks Again.

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