Recognition of the screen coding based on mathematical morphology

Screen coding is a new spatial domain information hiding technique, long recognition time and low recognition rate belongs to the traditional methods. Mathematical morphology algorithm has a natural parallel implementation structure. It can be applied to simplify the image data , keep the shape feature and remove the irrelevant part. In this paper, mathematical morphology algorithm is use to image denoising and edge extraction. By use of dilation operation, the influence introduced by tiny deformation is released. Experimental results indicate that this new algorithm have a higher recognition rate and it can reduce the decoding time .