Abstract
In this paper, a (7, 4) Hamming code-based color image watermarking scheme has been proposed for image authentication and tampered detection. Here, watermark image is generated after embedding watermark symbol within a color cover image. The cover image is partitioned into \((7 \times 7)\) pixel blocks and separated into three R, G, B color blocks. To embed watermark, (7, 4) Hamming code is used in each block. For each watermark embedding operation, 21 bits of watermark information are embedded within each color image block. The proposed scheme extracts secret data successfully from watermarked image. The authentication and tampered detection have been tested on watermarked image. Finally, the proposed scheme has been compared with the related existing state of the art methods in terms of visual quality.
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