I want to search within an image for a specific portion to extract it; it is mainly a document with signature at the end. I just want to extract the signature from the image. The signature is contained with outline and a word signature with background gray so identification can be easy if I can search within image for the right portion of signature and get the below part. I'm having around 700,000 forms to do this process, and the documents has been scanned not all the same but with different resolution and even some users cropped some images that's why it is hard for me to just crop in certain areas.
It is as if I'm trying to search within image, I searched the Internet and it seems in a topic named object detection, can someone suggest a way to do this or some library that can help?