Recovery of Quality in Print–Scan Images

-In this paper, we propose a novel method for improving digital image recovery from print – scan channel. A printed photograph is not sufficient to recover the original digital image because of distortions introduced in scanning process. The proposed approach recovers the print – scan images with improved quality. We solve this approximation problem by combining both the photograph and the digital auxiliary information in the same printed material. Digital auxiliary information is composed of small amount of digital data, which enables accurate image recovery. The proposed technique consists of two main processes namely encoding and decoding. Encoding process generates auxiliary information and it is kept together with the print. Decoding process uses the Auxiliary information along with the scan of the printed photograph to eliminate the distortions introduced during scanning process. Our experimental results confirm that the proposed approach recovers the digital image with high quality by using reduced amount of auxiliary information.