[ "周子扬(1999- ),男,湖南益阳人,中南林业科技大学硕士生,主要研究方向为可逆信息隐藏" ]
[ "谭云(1980- ),女,湖南浏阳人,中南林业科技大学副教授,主要研究方向为信息安全、图像处理" ]
[ "秦姣华(1973- ),女,湖南沅江人,中南林业科技大学教授,主要研究方向为网络信息安全、图像检索、模式识别" ]
[ "向旭宇(1972- ),男,湖南沅江人,中南林业科技大学教授,主要研究方向为网络信息安全、图像检索、模式识别" ]
网络首发:2023-08,
纸质出版:2023-08-25
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周子扬, 谭云, 秦姣华, 等. 基于最优DCT频段嵌入的JPEG图像可逆信息隐藏方法[J]. 网络与信息安全学报, 2023,9(4):166-177.
Ziyang ZHOU, Yun TAN, Jiaohua QIN, et al. JPEG reversible data hiding method based on optimal DCT frequency embedding[J]. Chinese Journal of Network and Information Security, 2023, 9(4): 166-177.
周子扬, 谭云, 秦姣华, 等. 基于最优DCT频段嵌入的JPEG图像可逆信息隐藏方法[J]. 网络与信息安全学报, 2023,9(4):166-177. DOI: 10.11959/j.issn.2096-109x.2023062.
Ziyang ZHOU, Yun TAN, Jiaohua QIN, et al. JPEG reversible data hiding method based on optimal DCT frequency embedding[J]. Chinese Journal of Network and Information Security, 2023, 9(4): 166-177. DOI: 10.11959/j.issn.2096-109x.2023062.
JPEG(joint photographic experts group)图像不仅能够保证良好的画质,且所需存储空间较小,是目前互联网应用最广泛的图像格式。JPEG图像可逆信息隐藏(RDH
reversible data hiding)方法可以隐藏和提取秘密信息,并无损恢复原始图像,被广泛用于文件管理和图像认证,具有非常重要的意义。现有的大多数RDH 方法在嵌入秘密信息后会明显增加载密图像的存储空间,对基于离散余弦变换(DCT
discrete cosine transform)系数嵌入的方法来说,如何选择频段位置是影响 JPEG图像可逆信息隐藏性能的关键问题。提出一种基于最优DCT频段嵌入的JPEG图像可逆信息隐藏方法。将熵解码后的JPEG图像分割成大小为8×8非重叠的DCT块,计算每个DCT块的平均纹理复杂度并进行升序排序,并将相邻DCT块中相同频段的交流系数(AC
alternating current)进行两两配对,在满足待嵌入信息容量的条件下,根据AC系数频段的失真代价函数求出最优 AC 系数频段位置集合。根据所设计的二维直方图映射策略嵌入秘密信息。实验结果表明,与现有方法相比,所提方法不仅降低了载密图像文件存储大小的扩展,且载密图像能够保持良好的视觉质量。
Joint photographic experts group (JPEG) images are widely used on the Internet due to their ability to maintain good picture quality while requiring less storage space.Reversible data hiding (RDH) techniques for JPEG images enable the hiding and extraction of secret information while allowing for lossless restoration of the original image.RDH is of great significance in file management and image authentication.However
many existing RDH methods result in a significant increase in the storage space of the encoded image after embedding secret information.For methods based on discrete cosine transform (DCT) coefficient embedding
the key issue that affects the performance of reversible information hiding in JPEG images is how to select the frequency band position.A reversible information hiding method for JPEG images was proposed
based on optimal DCT frequency embedding.The entropy decoded JPEG image was divided into 8×8 non-overlapping DCT blocks.The average texture complexity of each DCT block was calculated and ordered in ascending order.Then the alternating current (AC) in adjacent DCT blocks was paired pairwise.By satisfying the capacity of the information to be embedded
the optimal AC coefficient frequency position set was obtained from the distortion cost function of the AC coefficient frequency.The secret information was embedded according to the designed two-dimensional histogram mapping strategy.Experimental results demonstrate that the proposed method can reduce the expansion of the loaded image file’s storage size compared to existing methods
while maintaining good visual quality of the cover image.
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