is this for US banks ? I'm assuming not. >It provided us the coordinates of all the texts and all we had to do was look for texts similar to an Account number

is this for US banks ? I'm assuming not. >It provided us the coordinates of all the texts and all we had to do was look for texts similar to an Account number and IFSC from a cheque book. Using some regex it was easy to find closely matching strings Could you explain what you mean by this ? We are trying to read shopping receipts, but I have ZERO background in image processing... so have been trying to figure out what to do. I have been trying to use Google Vision API though. >The one which worked best for us was a custom designed filter using Otsu’s Thresholding principle. Is this where you pre-preocess the image to make it readable ? How does one do it - are these specialized tools or can I do this in python (like http://www.scipy-lectures.org/packages/scikit-image/auto_examples/plot_threshold.html http://www.scipy-lectures.org/packages/scikit-image/auto_exa...)