How can I remove the black horizontal shades from the picture:
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please show some sample pictures when asking these kind of questions! – Balaji R Oct 11 '15 at 04:59
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Try using an adaptive threshold algorithm. Check out the post I linked to you above for code and some sample uses. – rayryeng Oct 12 '15 at 06:30
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Perform thresholding to binarize the image into black and white. Should remove the gray areas. It seems that a global threshold should work, but if not, try using a localized thresholding algorithm.
This is the result when doing:
imshow(~(I<95))
Photon
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I added an example 1 line in matlab. Obviously, more elaborate algorithms can produce better results. – Photon Oct 11 '15 at 05:39