Title :
A DWT- based evaluation method of imperceptibility of watermark in watermarked color image
Author :
Yang, Hong-mei ; Liang, Yong-quan ; Wang, Xiao-dong ; Ji, Shu-Juan
Author_Institution :
Shandong Univ. of Sci. & Technol., Qingdao
Abstract :
The imperceptibility of watermark is one of the most important measures that evaluate the performance of the watermarking algorithm. The conventional evaluation model of image quality, PSNR, can´t evaluate the watermarked image quality well. The masking of background brightness, texture, frequency and color to human vision of color image is analyzed, and then a DWT-based vision masking calculation method of color image is proposed. Based on this method, the vision quality weight of pixel of color image is computed and an evaluation method of color image quality is derived, which is written as MPSNR. The experimental results show MPSNR works better than conventional model PSNR and its evaluation result is consistent with the human visual sensation, which can be used to evaluate the imperceptibility of watermarking algorithm.
Keywords :
discrete wavelet transforms; image coding; image colour analysis; image texture; watermarking; DWT-based vision masking; background brightness; color image quality; digital watermarking; discrete wavelet transforms; human vision; image color; image texture; watermark imperceptibility; watermarked color image; Brightness; Discrete wavelet transforms; Frequency; Humans; Image analysis; Image color analysis; Image quality; Image texture analysis; PSNR; Watermarking; Digital watermarking; discrete wavelet transform; evaluation of imperceptibility; human vision system;
Conference_Titel :
Wavelet Analysis and Pattern Recognition, 2007. ICWAPR '07. International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-1065-1
Electronic_ISBN :
978-1-4244-1066-8
DOI :
10.1109/ICWAPR.2007.4420663
