Color Image Models and Its Applications to Document Examination

Abstract

The questimed document examination plays an important role in forensic science. In Chinese documents, such as business contracts, there are stamps and signatures (or fingerprints) over them. Sometimes, those patterns (stamps, signatures or fingerprints) may superimpose on each other. When the documents being served as evidences to court, the overlapped patterns become contentious usually. Even in the document examination, overlapped patterns may interfere with the examination work. It will be helpful if we can reduce the overlapping influence before processing the document examination. The objective of image segmentation is to find regions that represent objects or meaningful parts of objects. The method for image segmentation is to find the measure of homogeneous regions of objects or to detect the boundaries between objects. In this paper, we review some color image models and explain how we apply the image segmentation method to analyze overlapped patterns in the document examination. Synthetic images and one real case image are used to show the capability of the image segmentation method.