I have this image containing some text written with mix of black sketch pen, black pen and pencil and i want to eliminate black sketch markings. What would be the best way to do it? I tried thresholding and then morphological methods but didn't get required result. I am new to opencv and interested in knowing what would experts do. What is the general strategy to tackle this or similar type of problems?
(/upfiles/1545671314412962.jpeg)