An digital image watermark algorithm is proposed based on the synergetic neural network,combined with encryption technique,to guarantee its robustness and security.The meaningful gray image is serially processed into watermark signal and embedded into the DC elements of the block DCT coefficient matrix of the host image.Watermark detection/extraction algorithm is realized by using synergetic neural network.The(network's) input is possible watermark signal and its output is the recognition result.The emulational experiments indicates that,the proposed algorithm can fulfill the watermark detecti...
