Detecting a stain

asked 2013-09-25 13:50:45 -0600

rafhael.andrade gravatar image

updated 2013-09-26 07:27:30 -0600

Hello.

I'm trying to detect a stain in an image. The original image has a marble background and the stain its almost the same color, sometimes the stain is darker and sometimes brighter than the marble background. See some examples:

http://upload.wikimedia.org/wikipedia/commons/f/f3/SierraXenolith.JPG http://us.123rf.com/400wm/400/400/losalex/losalex0711/losalex071100030/2057779-marble-structure-a-stain-a-strip-stone.jpg http://image2.yell.ru/responses/5/7/1/r_670743_pr8rse37rffkijk9skb7.jpg https://lh3.googleusercontent.com/-48VlxENbnkY/SjXKwlNTtyI/AAAAAAAABGs/fFIwLb21bu8/s640/Texture%20-%20Granite.JPG http://us.123rf.com/400wm/400/400/lobanov/lobanov1108/lobanov110800013/10391208-a-texture-of-marble-with-rust-stains.jpg

I would like to know if there is a function that can detect such stain. The difficulty is distinguish the stain from the marble texture background. Can somebody help me?

Thanks.

Rafhael

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Comments

Can you please post some example images?

GilLevi gravatar imageGilLevi ( 2013-09-26 06:50:19 -0600 )edit

Seems like color base segmentation can do the trick. Have you tried it?

GilLevi gravatar imageGilLevi ( 2013-09-26 12:14:46 -0600 )edit

I haven't done yet. Do you know which function I use to do it?

rafhael.andrade gravatar imagerafhael.andrade ( 2013-09-26 12:35:01 -0600 )edit

No, actually, I'm not that familiar with the practicalities of openCV.

GilLevi gravatar imageGilLevi ( 2013-09-26 13:18:34 -0600 )edit
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