基于DCT域的图像闭环数字水印的最佳水印强度估算

Best Estimation of Watermarking Embedding Strength about the Closed Loop Digital Watermarking Based on DCT Domain

主要对DCT域图像数字水印进行研究,以水印嵌入过程中图像的显示质量作为性能指标。若水印的嵌入导致图像的显示质量明显下降,则调整水印嵌入的强度或者水印本身,从而达到最佳嵌入,并给出在不影响图像显示质量的情况下水印嵌入达到最佳的水印强度的计算方法。

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.