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    • 7. 发明授权
    • Method and apparatus for authenticating biometric scanners
    • 用于认证生物识别扫描仪的方法和设备
    • US09087228B2
    • 2015-07-21
    • US14603387
    • 2015-01-23
    • THE UNIVERSITY OF MARYLAND COLLEGE PARK
    • Vladimir Iankov IvanovJohn S. Baras
    • G06K9/00G06K9/62
    • G06K9/00087G06K9/00013G06K9/00577G06K9/6215G06K2009/00583
    • Methods and systems involving image processing extract from an image and estimate unique intrinsic characteristics (scanner pattern) of a biometric scanner, such as area type fingerprint scanner. The scanner pattern is permanent over time, can identify a scanner even among scanners of the same manufacturer and model, and can be used to verify if a scanner acquired an image is the same as the scanner used for biometric enrollment, i.e., to authenticate the scanner and prevent security attacks on it. One method comprises selecting pixels from an enrolled and query image, masking useful pixels from the images, computing a similarity score between the common pixels of the enrolled and query useful pixels, and comparing this score with a threshold to determine whether the query image has been acquired by the same scanner as the enrolled image. The method can further comprise inverting the pixel values and/or filtering the selected pixels.
    • 涉及图像处理的方法和系统从图像提取并估计诸如区域型指纹扫描仪的生物测定扫描仪的独特内在特征(扫描器图案)。 扫描仪图案随着时间的推移是永久性的,即使在相同制造商和型号的扫描仪之间也可以识别扫描仪,并且可以用于验证扫描仪获取的图像是否与用于生物特征注册的扫描仪相同,即认证 扫描仪并防止对其进行安全攻击。 一种方法包括从注册和查询图像中选择像素,屏蔽来自图像的有用像素,计算已注册和查询有用像素的公共像素之间的相似性分数,以及将该分数与阈值进行比较,以确定查询图像是否已被 通过与注册图像相同的扫描仪获取。 该方法还可以包括反转像素值和/或对所选择的像素进行滤波。
    • 10. 发明申请
    • METHOD AND APPARATUS FOR AUTHENTICATING BIOMETRIC SCANNERS
    • 用于认证生物量扫描仪的方法和装置
    • US20150169936A1
    • 2015-06-18
    • US14603387
    • 2015-01-23
    • THE UNIVERSITY OF MARYLAND COLLEGE PARK
    • Vladimir Iankov IVANOVJohn S. Baras
    • G06K9/00G06K9/62
    • G06K9/00087G06K9/00013G06K9/00577G06K9/6215G06K2009/00583
    • Methods and systems involving image processing extract from an image and estimate unique intrinsic characteristics (scanner pattern) of a biometric scanner, such as area type fingerprint scanner. The scanner pattern is permanent over time, can identify a scanner even among scanners of the same manufacturer and model, and can be used to verify if a scanner acquired an image is the same as the scanner used for biometric enrollment, i.e., to authenticate the scanner and prevent security attacks on it. One method comprises selecting pixels from an enrolled and query image, masking useful pixels from the images, computing a similarity score between the common pixels of the enrolled and query useful pixels, and comparing this score with a threshold to determine whether the query image has been acquired by the same scanner as the enrolled image. The method can further comprise inverting the pixel values and/or filtering the selected pixels.
    • 涉及图像处理的方法和系统从图像提取并估计诸如区域型指纹扫描仪的生物测定扫描仪的独特内在特征(扫描器图案)。 扫描仪图案随着时间的推移是永久性的,即使在相同制造商和型号的扫描仪之间也可以识别扫描仪,并且可以用于验证扫描仪获取的图像是否与用于生物特征注册的扫描仪相同,即认证 扫描仪并防止对其进行安全攻击。 一种方法包括从注册和查询图像中选择像素,屏蔽来自图像的有用像素,计算已注册和查询有用像素的公共像素之间的相似性分数,以及将该分数与阈值进行比较,以确定查询图像是否已被 通过与注册图像相同的扫描仪获取。 该方法还可以包括反转像素值和/或对所选择的像素进行滤波。