I am looking for an Image manipulation SDK or library to work with scanned forms in extracting information entered by hand not as complex as OCR but enough to compare and determine fields marked or checked.
GDI+ seems to provide some help in image manipulation but having gone through the literature regarding it I havent found any examples of similar operations. And it would be a time consuming process to build something from scratch with it.
Are there any free development kits or libraries in C# that can help building such an application which will be able to compare the scanned images of filled forms with an empty form and extract the information required based on whether certain fields have been marked or not?