A DCT domain digital watermarking algorithm based on Logistic mapping and Arnold transform is proposed. The original watermark image is scrambled using Arnold transform, and then the image is subjected to block DCT transform. The embedding position of the watermark information is controlled by combining Logistic mapping, and the scrambled watermark image is embedded into the DCT domain intermediate frequency coefficients of the image. The watermark image is obtained by performing block DCT inverse transform. The blind detection of the watermark is realized by using the relationship between the DCT coefficients of the image. The experimental results show that the algorithm not only has good concealment, but also has good robustness against common watermark attacks.
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