| 双JPEG压缩图像中初始量化系数的估算方法 |
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| 引用本文： | 岳红原.双JPEG压缩图像中初始量化系数的估算方法[J].南京工程学院学报(自然科学版),2008,6(4):28-34. |
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| 作者姓名： | 岳红原 |
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| 作者单位： | 南京工程学院计算机工程学院,江苏,南京,211167 |
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| 基金项目： | 南京工程学院科研基金项目
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| 摘 要： | 为有效分析双JPEG压缩的统计特性，论述了双JPEG压缩现象，并对某一特定位置的DCT系数的直方图进行了分析，从中找出某些特性，如：双峰，零值点等．针对不同的双压组合，其DCT直方图的特性会有所不同，利用支持向量机（SVM）对其进行分类，从分类的结果来看，分类的正确率普遍能够达到98％以上，再用训练好的模式去估计双JPEG压缩图像中初始量化系数．
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| 关 键 词： | 统计特性 双JPEG压缩 支持向量机 |
Estimation Method of Primary Quantization Coefficient in Double Compressed JPEG Images |
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| YUE Hong-yuan.Estimation Method of Primary Quantization Coefficient in Double Compressed JPEG Images[J].Journal of Nanjing Institute of Technology :Natural Science Edition,2008,6(4):28-34. |
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| Authors: | YUE Hong-yuan |
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| Institution: | YUE Hong-yuan(School of Computer Engineering,Nanjing Institute of Technology,Nanjing 211167,China) |
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| Abstract: | This paper discusses the phenomenon of double-JPEG compression with a view to effectively analyzing its statistical properties.Based on the analysis of specific location of the DCT coefficient of histogram,some characteristics such as double peaks and zero points were obtained.Double-JPEG compression was classified according to diverse characteristics of its DCT histogram with the use of support vector machines(SVM).The result indicates that more than 98 percent of the classification is correct.Then,the wel... |
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| Keywords: | statistical characteristics double-JPEG compression support vector machines(SVM) |
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