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    • 4. 发明申请
    • Adaptive Prediction Filtering for Digital Watermarking
    • 数字水印的自适应预测滤波
    • US20070286455A1
    • 2007-12-13
    • US11761953
    • 2007-06-12
    • Brett Bradley
    • Brett Bradley
    • G06K9/00
    • G06T1/0064G06T2201/0051G06T2201/0061G06T2201/0065H04N1/32149H04N1/32331
    • A watermarked signal is pre-filtered based on an analysis of signal characteristics that identify filter parameters that yield better correspondence between the filtered watermarked signal and the digital watermark. The watermark detection method computes signal characteristics of a host digitally watermarked signal, and analyzes the characteristics to determine an extent to which the signal characteristics correspond to characteristics of the digital watermark. The method adapts parameters of digital watermark prediction applied to the watermarked signal based on the extent to which the signal characteristics correspond to the characteristics of the digital watermark. In one embodiment, different filters or filter parameters are selected to match different signal characteristics of the watermarked signal with the characteristics of the digital watermark.
    • 基于识别滤波器参数的信号特征的分析来对水印信号进行预滤波,滤波器参数在滤波后的水印信号和数字水印之间产生更好的对应关系。 水印检测方法计算主机数字水印信号的信号特性,并分析特征以确定信号特性对应于数字水印特性的程度。 该方法根据信号特性对应于数字水印特性的程度,适应水印信号的数字水印预测参数。 在一个实施例中,选择不同的滤波器或滤波器参数以匹配具有数字水印特性的带水印信号的不同信号特性。
    • 6. 发明申请
    • Image, Video or Audio Filtering Before Biometric Recognition
    • 生物识别之前的图像,视频或音频滤波
    • US20080013801A1
    • 2008-01-17
    • US11765987
    • 2007-06-20
    • Alastair ReedBrett Bradley
    • Alastair ReedBrett Bradley
    • G06K9/00
    • G06K9/40G06K9/00885
    • The present invention relates generally to pre-processing images, audio and/or video to improve biometric analysis from such. In one implementation, a method is provided including: receiving a color digital image including a representation of a human subject; converting the color digital image into grayscale values; transforming at least one representation of the converted color image; analyzing the transformed, converted color image to identify artifacts; if artifacts are found, processing the color digital image to reduce the artifacts; and providing the processed digital image to a biometric system. Other implementations are provided as well.
    • 本发明一般涉及预处理图像,音频和/或视频以改善生物特征分析。 在一个实现中,提供了一种方法,包括:接收包括人类对象的表示的彩色数字图像; 将彩色数字图像转换为灰度值; 转换所转换的彩色图像的至少一个表示; 分析转换后的彩色图像,以识别人为因素; 如果发现伪像,则处理彩色数字图像以减少伪影; 并将经处理的数字图像提供给生物测定系统。 还提供其他实现。