p.1 #1 · Automatic detection of scratches in digital images
Hi, I'm looking for a program that would detect scratches smuges etc. in a digital scanned image. The method comprises the steps of detecting positions of pixels having a significant value deviation from a horizontally averaged value. The number of detected positions within a pre-defined distance in the same vertical column containing the pixel are counted. A pixel is flagged as a scratch site whenever the count of detected positions exceeds a pre-defined threshold.
I know some scanning software has scratch remove feature etc. the goal here is entirely different the program must locate defect areas and notify the user graphically and print a log. Something like http://www.lightningcube.com/hotpixeldetector.htm but needs to work with scanned images.
p.1 #2 · Automatic detection of scratches in digital images
Scanners use Digital Ice technology, a combination of hardware (separate infrared scan) and software to detect dust and scratches, replacing the pixels with a nearest neighbor type of algorithm.
