How to improve the sharpness of an image for OCR

[loulou2522]

I'm looking for a way to improve the sharpness of an image so that I can process it with Tesseract to extract the text. Does anyone have a solution?
Thanks

[Tenaja]

For a single file, load it into Paint.Net and adjust contrast...
sorry, can't help with the code, but pdn is open source (I think), so viewing the code might get you a solution.

[SPH]

I'm curious : post your pic here. I want to see it

[DarkDragon]

Tesseract often needs images of a certain size. You might want to resize your input image a bit. Smaller texts may not be recognized. Sharpness is usually not the problem. Most deep learning methods are also vulnerable to single pixel changes. So don't totally trust the textual output of any OCR.