how can remove corner of binary image??

how can remove corner of binary image?? foe example if we have an image like this ::

how can remove the corner of this image and get the image like this:

thanks

Answer 1

[Iain]

If you repeatedly erode & dilate (imerode & imdilate) the image you should get close to what you want if you use the right "neighbourhoods".

You could alternatively generate ANOTHER binary image, which is 1 (true) where you want to keep it, and 0 where you want to discard it. You'll need to think about how you generate that image, but for a simple version:

 other_binary_image = false(size(im));
 other_binary_image(:,1:50) = true; % to keep the left 50 columns
 new_image = im & other_binary_image;

You'll need to think about how you generate this "mask" to make sure it does what you want it to.

[sara]

thanks Iain

I test imerode & imdilate these are useful...

[Image Analyst]

Yes, that's one way. lain is probably thinking of the method of alternating sequential filters. Here is the reference: http://www.esiee.fr/~coupriem/Pdf/cb04.pdf It looks like (from what the new perimeter looks like) the method you used was watershed.

[sara]

thanks Image Analyst