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1. 发明申请

US20080031535A1 APPARATUS AND METHOD FOR A GENERALIZED BENFORD's LAW ANALYSIS OF DCT AND JPEG COEFFICIENTS 有权
标题翻译：用于DCT和JPEG系数的通用的BENFORD的法律分析的装置和方法
公开(公告)号：US20080031535A1
公开(公告)日：2008-02-07
申请号：US11772636
申请日：2007-07-02
申请人： Yun-Quing Shi , DongDong FU
发明人： Yun-Quing Shi , DongDong FU
IPC分类号： G06K9/36
CPC分类号： H04N19/625 , H04N19/126 , H04N19/85
摘要： A method and apparatus for a novel statistical model based on Benford's law for the probability distributions of the first digits of the block-DCT and quantized JPEG coefficients. A parametric logarithmic law, the generalized Benford's law, is formulated. Furthermore, some potential applications of this model in image forensics, which include the detection of JPEG compression for images in bitmap format, the estimation of JPEG compression Q-factor for JPEG compressed bitmap image, and the detection of double compressed JPEG image. Experimental results demonstrate the effectiveness of the statistical model used in embodiments of the invention.
摘要翻译：一种基于Benford定律的新型统计模型的方法和装置，用于块DCT和量化JPEG系数的第一位的概率分布。制定了参数对数法，即广义本福德定律。此外，该模型在图像取证中的一些潜在应用，包括以位图格式的图像检测JPEG压缩，JPEG压缩位图图像的JPEG压缩Q因子的估计以及双压缩JPEG图像的检测。实验结果证明了在本发明实施例中使用的统计模型的有效性。

2. 发明授权

US07940989B2 Apparatus and method for a generalized benford's law analysis of DCT and JPEG coefficients 有权
标题翻译：用于DCT和JPEG系数的广义贝福定律分析的装置和方法
公开(公告)号：US07940989B2
公开(公告)日：2011-05-10
申请号：US11772636
申请日：2007-07-02
申请人： Yun-Quing Shi , DongDong Fu
发明人： Yun-Quing Shi , DongDong Fu
IPC分类号： G06K9/00 , G06K9/36 , G06K9/38 , G06K9/46
CPC分类号： H04N19/625 , H04N19/126 , H04N19/85
摘要： A method and apparatus for a novel statistical model based on Benford's law for the probability distributions of the first digits of the block-DCT and quantized JPEG coefficients. A parametric logarithmic law, the generalized Benford's law, is formulated. Furthermore, some potential applications of this model in image forensics, which include the detection of JPEG compression for images in bitmap format, the estimation of JPEG compression Q-factor for JPEG compressed bitmap image, and the detection of double compressed JPEG image. Experimental results demonstrate the effectiveness of the statistical model used in embodiments of the invention.
摘要翻译：一种基于Benford定律的新型统计模型的方法和装置，用于块DCT和量化JPEG系数的第一位的概率分布。制定了参数对数法，即广义本福德定律。此外，该模型在图像取证中的一些潜在应用，包括以位图格式的图像检测JPEG压缩，JPEG压缩位图图像的JPEG压缩Q因子的估计以及双压缩JPEG图像的检测。实验结果证明了在本发明实施例中使用的统计模型的有效性。

3. 发明授权

US07991185B2 Method and apparatus for image splicing/tampering detection using moments of wavelet characteristic functions and statistics of 2-D phase congruency arrays 有权
标题翻译：使用小波特征函数的矩和2-D相位一致阵列的统计图像拼接/篡改检测的方法和装置
公开(公告)号：US07991185B2
公开(公告)日：2011-08-02
申请号：US11772671
申请日：2007-07-02
申请人： Yun-Quing Shi , Wen Chen
发明人： Yun-Quing Shi , Wen Chen
IPC分类号： G06K9/00
CPC分类号： G06K9/527
摘要： Embodiments of the invention are a novel splicing detection scheme that detects the spliced images by distinguishing image features that are extracted by exploiting both magnitude and phase information of a given image. The image features include the statistical moments of characteristic functions of wavelet subbands of a test image and a prediction-error image. In addition, the approximation (LL) subband at different levels is individually erased by forcing the wavelet coefficients to zero and the inverse wavelet transform is applied in order to produce reconstructed image with enhanced high frequency components. Further, the moments of the characteristic functions of these reconstructed images provide additional image features. Moreover, the statistics (mean, variance, skewness and kurtosis) of 2-D phase congruency array associated with the reconstructed images provide additional image features for splicing detection. These inputs provide a 120 dimensional image feature vector that includes 96 moment features and 24 phase features.
摘要翻译：本发明的实施例是一种新颖的拼接检测方案，其通过区分通过利用给定图像的幅度和相位信息提取的图像特征来检测拼接图像。图像特征包括测试图像的小波子带的特征函数的统计矩和预测误差图像。另外，通过强制小波系数为0，并且应用逆小波变换来产生不同级别的近似（LL）子带，以便产生具有增强的高频分量的重构图像。此外，这些重建图像的特征功能的时刻提供附加的图像特征。此外，与重建图像相关联的二维相位一致阵列的统计（平均值，方差，偏度和峰度）为拼接检测提供了额外的图像特征。这些输入提供了120维图像特征向量，其包括96个矩形特征和24个相位特征。

4. 发明申请

US20080037823A1 METHOD AND APPARATUS FOR IMAGE SPLICING/TAMPERING DETECTION USING MOMENTS OF WAVELET CHARACTERISTIC FUNCTIONS AND STATISTICS OF 2-D PHASE CONGRUENCY ARRAYS 有权
标题翻译：使用小波特征函数的图像分割/篡改检测的方法和装置和二维相位阵列的统计
公开(公告)号：US20080037823A1
公开(公告)日：2008-02-14
申请号：US11772671
申请日：2007-07-02
申请人： Yun-Quing Shi , Wen Chen
发明人： Yun-Quing Shi , Wen Chen
IPC分类号： G06T1/00
CPC分类号： G06K9/527
摘要： Embodiments of the invention are a novel splicing detection scheme that detects the spliced images by distinguishing image features that are extracted by exploiting both magnitude and phase information of a given image. The image features include the statistical moments of characteristic functions of wavelet subbands of a test image and a prediction-error image. In addition, the approximation (LL) subband at different levels is individually erased by forcing the wavelet coefficients to zero and the inverse wavelet transform is applied in order to produce reconstructed image with enhanced high frequency components. Further, the moments of the characteristic functions of these reconstructed images provide additional image features. Moreover, the statistics (mean, variance, skewness and kurtosis) of 2-D phase congruency array associated with the reconstructed images provide additional image features for splicing detection. These inputs provide a 120 dimensional image feature vector that includes 96 moment features and 24 phase features.
摘要翻译：本发明的实施例是一种新颖的拼接检测方案，其通过区分通过利用给定图像的幅度和相位信息提取的图像特征来检测拼接图像。图像特征包括测试图像的小波子带的特征函数的统计矩和预测误差图像。另外，通过强制小波系数为0，并且应用逆小波变换来产生不同级别的近似（LL）子带，以便产生具有增强的高频分量的重构图像。此外，这些重建图像的特征功能的时刻提供附加的图像特征。此外，与重建图像相关联的二维相位一致阵列的统计（平均值，方差，偏度和峰度）为拼接检测提供了额外的图像特征。这些输入提供了120维图像特征向量，其包括96个矩形特征和24个相位特征。

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