Academic Journal
基于最优块排序的自适应JPEG 图像 可逆信息隐藏算法.
| Τίτλος: | 基于最优块排序的自适应JPEG 图像 可逆信息隐藏算法. (Chinese) |
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| Alternate Title: | Adaptive JPEG image reversible information hiding algorithm based on optimal block sorting. (English) |
| Συγγραφείς: | 岳 亚, 张敏情, 赖培政, 狄富强 |
| Πηγή: | Modern Electronic Technology; 2026, Vol. 49 Issue 3, p76-83, 8p |
| Θεματικοί όροι: | JPEG (Image coding standard), Reversible data hiding (Computer science), Data compression, Discrete cosine transforms, Image processing, Signal-to-noise ratio |
| Abstract (English): | In view of the image quality degradation and file size expansion in the process of reversible information hiding of JPEG images, an adaptive JPEG image reversible information hiding algorithm based on optimal block sorting is proposed. The JPEG image's quantized DCT coefficients are divided into 8×8 blocks after entropy decoding. Each sub-block's threshold value T is calculated, and all the sub-blocks are sorted by T to achieve an optimal block sequence. Non-zero AC coefficients within sub-blocks, less than or equal to a predefined amplitude, are paired for information embedding, while those non-zero AC coefficients exceeding the predefined amplitude are shifted to create space. To minimize the ineffective shifts of AC coefficients, the latest 2D histogram reversible mapping rules are incorporated into the algorithm to adaptively select frequency coefficients from different sub-blocks for information embedding. Experimental results show the proposed method can enhance the peak signal-to-noise ratio (PSNR) by 0.06 dB to 1.79 dB and reduces file size increment by 4.3% to 16.5% in comparison with the four mainstream methods, allowing for fully reversible recovery of the carrier image. To sum up, the proposed method has a certain applicability. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): | 为解决JPEG图像在可逆信息隐藏过程中出现的图像质量下降及文件体积膨胀的问题, 文中提出一种基于最优 块排序的自适应JPEG图像可逆信息隐藏算法。首先对JPEG图像熵解码后的量化DCT系数进行8×8分块, 计算每个子块的阈 值T, 根据阈值T 对所有子块进行排序, 得到最优块序列。预先设定幅值大小, 将子块中小于等于幅值的非零AC系数进行两两 配对以嵌入信息, 而对于那些超出幅值的非零AC系数, 则移位以腾出空间。同时, 为了减少AC系数的无效移动, 结合最新的 二维直方图可逆映射规则, 自适应选择不同子块的频段系数用于信息嵌入。实验结果表明, 该方法相比于4种主流经典方法, 峰 值信噪比提高了0.06~1.79 dB, 文件大小增量降低了4.3%~16.5%, 并且能够完全可逆地恢复载体图像, 具有一定的适用性. [ABSTRACT FROM AUTHOR] |
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| Βάση Δεδομένων: | Complementary Index |
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