Best Estimation of Watermarking Embedding Strength about the Closed Loop Digital Watermarking Based on DCT Domain
Researches on the image digital watermarking based on DCT domain, and uses the image display quality as one of the indicators. If the watermark embedding leads to obvious decline in the image display quality, we should adjust the intensity of the watermark embedding or the watermark itself, so as to achieve the best embedding, and then gives the calculation of the best wartermarking strenth without prejudice to the image display quality.