Detecting dirt on scanner glass (via scanned photo)

12

Thanks for the assistance. I have a lot of experience in software, but none in openCV, so some of the things you suggest are foreign to me. Any chance you can point me to examples on what these things are and how to do it? I dont know what a radon transform is, I have never dealt with histograms, so not really following there. Agree about the sepia, but more interested in having these digitized than perfect. Open to suggestions on sepia as well. Wish I had all the time in the world to do this, but have maybe an hour a day to look into this and its not a simple topic to read up on, so unfortunately without some examples, its unlikely I will be able to follow up on these