uneven illuminated images

Posted by coul on Stack Overflow See other posts from Stack Overflow or by coul
Published on 2010-03-19T13:16:02Z Indexed on 2010/03/19 14:51 UTC
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image-processing

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image-enhancement

How to get rid of uneven illumination from images, that contain text data, usually printed but may be handwritten? It can have some spots of lights because the light reflected while making picture. I've seen the Halcon program's segment_characters function that is doing this work perfectly, but it is not open source. I wish to convert an image to the image that has a constant illumination at background and more dark colored regions of text. So that binarization will be easy and without noise. The text is assumed to be dark colored than it's background. Any ideas?

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