Novel scheme of adaptive watermarking for digital image copyright

A novel scheme of digital watermarking for image copyright was proposed. The logo pixels were mixed by the chaotic map in a specified spatial domain and embedded in the DCT coefficients. In order to lay the watermarking information in the notable areas of the image features, an algorithm of fuzzy entropy estimation was proposed. The embedding watermark strength varied with the local feature coefficients of the original image. The embedded logo can be recovered in later detection and reconstruction from the watermarked image to show the existence of copyright.