image segmentation

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

Answer 1

[Sean de Wolski]

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)));

Answer 2

[Sean de Wolski]

 doc imfill
 doc poly2mask

Answer 3

[Gaurav Kaila]

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.

Answer 4

[Gaurav Kaila]

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

Thanks Again.

Answer 5

[Gaurav Kaila]

I got it!

Thank You!