Video Watermark Using Multiresolution Wavelet
Decomposition
WANG Feng-bi;HUANG Jun-cai;WANG Bin;SHE Kun;ZHOU Ming-tian
【期刊名称】《电子科技学刊》 【年(卷),期】2005(003)002
【摘要】A novel technique for the video watermarking based on the discrete wavelet transform (DWT) is present. The intra frames of video are transformed to three gray image firstly, and then the 2th-level discrete wavelet decomposition of the gray images is computed, with which the watermark W is embedded simultaneously into and invert wavelet transform is done to obtain the gray images which contain the secret information. Change the intra frames of video based on the three gray images to make the intra frame contain the secret information. While extracting the secret information, the intra frames are transformed to three gray image, 2th-level discrete wavelet transform is done to the gray images, and the watermark W' is distilled from the wavelet coefficients of the three gray images. The test results show the superior performance of the technique and potential for the watermarking of video. 【总页数】4页(120-122,160)
【关键词】intra frame;discrete wavelet transform;video watermark embedding;video watermark extracting
Video Watermark Using Multiresolution Wavelet Decomposition
