A ROI Image Watermarking Algorithm Based on Lifting Wavelet Transform
Dashun Que, Zhang Li, Ling Lu, Liucheng Shi · 2006
In this paper, we propose a ROI image watermarking algorithm for hiding secrete information in important image. The ROI information is segmented and extracted in original image, and then gray value supplement is made in that region to generate the disguised cover image, in which the ROI image encrypted by chaos is embedded based on lifting wavelet transform. Experiments show that the proposed watermarking scheme is of huge hiding information capacity as well as high imperceptibility and robustness against various signals processing such as cropping, JPEG compression and noise attack. This algorithm has important practical value of information security to the transmission of important image such as remote sensing, SAR images