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Hi there
After some searching on the web, I have not found the solution to the following problem:
I have some photographic images of paper documents with text on it (due to size, it has to taken by camera). As the paper is old and a little faded by the light, the paper is whitish to brownish: the color and brightness is changing depending on the position (darker where the paper was hit by light). The text is dark grey, almost black.
Ideally, I would like to convert the images into pure black and white images (not greyscale: black text on white background).
Is there a good tutorial how to achieve this? The procedure has to account for the changing local brightness and contrast. (Using a simple threshold will render some parts of the image black or white; you cannot find a appropriate threshold for the whole image.)
Help is very much appreciated
sam
After some searching on the web, I have not found the solution to the following problem:
I have some photographic images of paper documents with text on it (due to size, it has to taken by camera). As the paper is old and a little faded by the light, the paper is whitish to brownish: the color and brightness is changing depending on the position (darker where the paper was hit by light). The text is dark grey, almost black.
Ideally, I would like to convert the images into pure black and white images (not greyscale: black text on white background).
Is there a good tutorial how to achieve this? The procedure has to account for the changing local brightness and contrast. (Using a simple threshold will render some parts of the image black or white; you cannot find a appropriate threshold for the whole image.)
Help is very much appreciated
sam
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