A Digital Watermarking Algorithm of Color Images Based on Surface Fitting

doi:10.3969/j.issn.1006-2475.2014.07.030

Abstract

Abstract: A digital watermarking algorithm for color images is discussed. The proposed method applies a self-adaptive segmentation technique to divide an image into three classes with different sub-block sizes, such as 16×16, 8×8 and 4×4, and chooses those blocks with size of 4×4 to embed the watermarks. In order to get robust performance, the method scrambles the 4×4 block by a pseudo random scheme, then embeds the watermarks to the scrambled blocks. To reduce the error that caused by surface fitting, we use error compensation technique to improve the quality of the watermarked image. The results show that the algorithm is robust against various typical attacks, such as compression, filtering, noising and shearing.

Key words: surface fitting, digital watermarking, robustness

CLC Number:

TP393.08

LU Jian, TU Guang-yi, WU Hai-yan. A Digital Watermarking Algorithm of Color Images Based on Surface Fitting[J]. Computer and Modernization, doi: 10.3969/j.issn.1006-2475.2014.07.030.

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