Text extraction from a binary image

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Soumyadip 2013-3-29

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https://ww2.mathworks.cn/matlabcentral/answers/69080-text-extraction-from-a-binary-image

I am doing a project to read the data on a calculator screen via image processing. I need to make the image binary in such a way that only the digits in the image appear black and the rest is white. Can I do it with any image enhancement tool? Please suggest. Can somebody do it for me?

The link to the image is -

Thanks in advance

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Chandra Shekhar 2013-3-29

There is no image in that link,it is saying doesn't exist.

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Chandra Shekhar 2013-3-29

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https://ww2.mathworks.cn/matlabcentral/answers/69080-text-extraction-from-a-binary-image#answer_80392

use 'histeq' function for enhancement or use 'adapthisteq' by choosing proper clipping range.

After applying this method convert to binary.

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Soumyadip 2013-3-30

I applied adapthisteq and converted to binary but I am getting dark patches like -

Please advise how to remove the dark regions

Image Analyst 2013-3-31

See my answer to your duplicate question. I got the numbers out of there using color segmentation and some standard image processing to clean up some noise. I didn't even have to do background correction. You should not accept an answer if it didn't answer your question.

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