There's a number of steps you'll need to figure out. for the 70k forms, where do the fields come from. Then for every scan, finding the bounding box for every f

There's a number of steps you'll need to figure out. for the 70k forms, where do the fields come from. Then for every scan, finding the bounding box for every field in a somewhat automated manner. You can use histograms and blob detection to help out with a number of these. Once you have thresholded text boxes that are quite legible, you can train your CNN's and LSTMS to read text from images.