earticle

영어

This paper proposes a reversible blind image watermarking scheme for digital images based on discrete fractional random transform (DFRT). Based on a patchwork watermarking scheme, the proposed algorithm utilizes histogram rotation to embed a binary watermark in DFRT domain with strong information security. To evaluate the performance of the proposed scheme, several experiments are configured for block size, capacity (bits/pixel) as a function of embedding level. The results show the performances of proposed scheme are the same and/or the higher than the conventional histogram rotation scheme in [2]. But high security by DFRT is a unique in the proposed scheme while that is absent in the histogram rotation- based conventional scheme.