Published Paper Details:

Image forensic in one of the most important applications of Image processing using watermarking. Protection of images against tampering is considered as important applications in Image forensics. In the last few years, researchers have developed many techniques for detecting watermarks that containing check bits and reference bits. State of art techniques are used for detecting watermarks containing check bits and reference bits. Recovering the lost reference bits still hold as problem. This paper is aimed at showing the location of tampering region; image tampering can be identified and considered as erasure error. Therefore, a proper design of channel code has to be designed to protect the reference bits against tampering. In the present proposed approach, the watermark bit-budget is categorized into three groups: a) source encoder output bits; b) channel code parity bits; and c) check bits. In watermark embedding phase, initially, the original input image is source coded and the produced output bit stream is protected with the help of channel encoder. For image reconstruction and recovery, tampered locations are identified with the help of check bits to help channel decoder in order to recover the original source encoded input image. The watermarked image quality gain is achieved through spending less bit-budget on watermark, while image recovery quality is enhanced as a consequence of consistent performance of designed source and channel codes.