A Secure Coding Approach for Digital Image Recovery and Protection using Watermarking Reddy O. Madhusudhan, Reddy S. Chandramohan JNTU College of Engineering, Pulivendula, India Online published on 23 March, 2017. Abstract Watermarking algorithms have been a keen impact in the field of image forensics. Among these forensic applications protection of images against tampering is considered as important application. Hence, we need to design a watermarking algorithm by considering the impact of image tampering. Such as 1) detecting the tampered region of the image received and 2) recovering information lost in those tampered zones. 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 regarding tampering region known; 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 to three groups: 1) source encoder output bits; 2) channel code parity bits; and 3) check bits. In watermark embedding phase firstly, 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 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 can be enhanced as a consequence of consistent performance of designed source and channel codes. Top Keywords Heck bits, SPIHT algorithm, RS codes, Fragile watermarking, Tampering. Top |