Develop a better image preprocessing algorithm.

[sgrpanchal31]

Currently, we are using the following filters before sending the images for OCR:
RGB -> Grayscale -> GaussianBlur -> Grayscale -> RGB
The problem we are facing is that some of the bold text is not been able to detect by OCR. Also, some of the images with non-black backgrounds are undetectable.
You can find the algorithm in the file process.py file under the function name preprocess_for_ocr.