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Hello everybody,

I am new here and I am writing you this message to ask you for help with my problem. I have made a digital picture of a book page with my digital camera. My camera is a 12 mpix digital camera and it should make good digital pictures, at least in theory. The original picture made by the camera was 4000 × 3000 pixels big and I made a small chunk out of it which you can find in the attachment.

My problem is how to isolate text from the background to make almost perfect text selection. I need text for the OCR procedure so the text selection needs to be appropriate.

I have already tried some simple methods like magic wand, contrasts, brightness etc but this things look like a game to me. I would like to know if there is a systematic approach (channels, masks) to perfectly isolate black color from the rest of the picture and how to apply it. Please, help me.

Thank you very much in advance,

John Smith