A robust reversible watermarking method against jpeg compression, digital television broadcasting system
A robust watermarking and watermarking technology, applied in image data processing, image data processing, instruments, etc., can solve problems such as fragmentation and lack of attention
Active Publication Date: 2021-10-08
XIDIAN UNIV
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[0003] To sum up, the problem existing in the existing technology is: only a few research results in the robust reversible watermarking method are about the direction of anti-JPEG compression, and they are not systematic. They specialize in the robust reversible watermarking of jpg format images against the direction of JPEG compression. , has not received more attention at this stage
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[0033] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0034] The invention utilizes DCT coefficients after quantization and before encoding in the JPEG compression process, and embeds robust reversible watermarks into different areas of intermediate frequency coefficients according to block complexity predicted by high frequency coefficients. The invention can be used for hiding secret information.
[0035] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0036] Such as figure 1 As shown, the robust reversible watermarking method against JPEG compression provided by the embodiment of the pre...
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The invention belongs to the technical field of digital watermarking, and discloses a robust and reversible watermarking method against JPEG compression and a digital television broadcasting system, which use the high-frequency part of the DCT coefficient after quantization and before encoding in the JPEG compression process to predict the block complexity; Embed the watermark information into the IF robust region with high block complexity; embed the reversible information into the IF reversible region with low block complexity. The invention utilizes DCT coefficients after quantization and before encoding in the JPEG compression process, and embeds robust reversible watermarks into different areas of intermediate frequency coefficients according to block complexity predicted by high frequency coefficients. The invention can be used for hiding secret information, and realizes a good effect of resisting JPEG compression attack.
Description
technical field [0001] The invention belongs to the technical field of digital watermarking, and in particular relates to a robust reversible watermarking method against JPEG compression and a digital television broadcasting system. Background technique [0002] The main research areas of digital watermarking are reversible digital watermarking and robust digital watermarking; the robustness of reversible digital watermarking is poor, while robust digital watermarking cannot restore the original carrier image. In order to solve the existing problems, robust reversible digital watermarking combines the advantages of both. When the image is attacked, the watermark information can be extracted more accurately; when the image is not attacked, it can not only extract the watermark information, but also restore the image. out the original carrier. In the robust reversible watermarking method, only a few research results are about the direction of anti-JPEG compression, and they a...
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IPC IPC(8): G06T1/00
CPCG06T1/0057
Inventor 王祥苏玉洁裴庆祺
Owner XIDIAN UNIV