A DWT-based Watermarking Scheme with Multi-bands’ Detection

Abstract

A feasible DWT-based watermarking scheme is proposed in this paper. The scheme is designed from the idea of extracting watermark from those stable trends of DWT sub-bands’ distribution. The watermarks is embedded by modifying all coefficients of each subband according to their modifiable capacity. The modification of coefficients is based on aspect of implementation and observation to DWT on digital image. It is also mentioned that how different attacks influence the ability of watermark scheme under similar structure and how the watermark extracted from those undamaged subbands. Experimental results demonstrate that the idea is accurate. The proposed method is robust enough to tolerate most of image-processing operations.