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    • 4. 发明申请
    • Detecting Double JPEG Compression in Images
    • 检测图像中的双JPEG压缩
    • US20090257656A1
    • 2009-10-15
    • US12422683
    • 2009-04-13
    • Yun-Qing ShiChunHua Chen
    • Yun-Qing ShiChunHua Chen
    • G06K9/46
    • H04N19/60G06T7/0004G06T2207/30168
    • Techniques are generally described for detecting double JPEG compression in images. Example detection techniques of double JPEG compression may include receiving JPEG images for analysis and extracting 2-dimensional (2-D) arrays of JPEG coefficients from the images. 2-D difference arrays may be generated from the array of JPEG coefficients, with the entries in the difference array reflecting relative changes in values of pairs of entries in the array of JPEG coefficients. The detection techniques also model the difference arrays using random processes, and evaluate whether the random processes reveal statistical artifacts in the JPEG images. These statistical artifacts result from double JPEG impression performed on the JPEG images.
    • 通常描述了用于检测图像中的双JPEG压缩的技术。 双JPEG压缩的示例检测技术可以包括接收JPEG图像用于分析并从图像中提取JPEG系数的二维(2-D)阵列。 可以从JPEG系数的阵列生成2-D差异阵列,差分阵列中的条目反映JPEG系数阵列中条目对的值的相对变化。 检测技术还使用随机过程对差异阵列建模,并评估随机过程是否显示JPEG图像中的统计伪像。 这些统计伪像是由JPEG图像上执行的双JPEG印象造成的。
    • 5. 发明授权
    • Detecting double JPEG compression in images
    • 检测图像中的双JPEG压缩
    • US08200034B2
    • 2012-06-12
    • US12422683
    • 2009-04-13
    • Yun-Qing ShiChunHua Chen
    • Yun-Qing ShiChunHua Chen
    • G06K9/36G06K9/46
    • H04N19/60G06T7/0004G06T2207/30168
    • Techniques are generally described for detecting double JPEG compression in images. Example detection techniques of double JPEG compression may include receiving JPEG images for analysis and extracting 2-dimensional (2-D) arrays of JPEG coefficients from the images. 2-D difference arrays may be generated from the array of JPEG coefficients, with the entries in the difference array reflecting relative changes in values of pairs of entries in the array of JPEG coefficients. The detection techniques also model the difference arrays using random processes, and evaluate whether the random processes reveal statistical artifacts in the JPEG images. These statistical artifacts result from double JPEG impression performed on the JPEG images.
    • 通常描述了用于检测图像中的双JPEG压缩的技术。 双JPEG压缩的示例检测技术可以包括接收JPEG图像用于分析并从图像中提取JPEG系数的二维(2-D)阵列。 可以从JPEG系数的阵列生成2-D差异阵列,差分阵列中的条目反映JPEG系数阵列中条目对的值的相对变化。 检测技术还使用随机过程对差异阵列建模,并评估随机过程是否显示JPEG图像中的统计伪像。 这些统计伪像是由JPEG图像上执行的双JPEG印象造成的。