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    • 5. 发明授权
    • Apparatus and method for detecting camera tampering using edge image
    • 使用边缘图像检测相机篡改的装置和方法
    • US09230166B2
    • 2016-01-05
    • US14689717
    • 2015-04-17
    • SK TELECOM CO., LTD.
    • Hee-yul LeeKi-mun Kim
    • G06K9/00G06K9/62G06T7/00
    • G06K9/00624G06K9/6202G06K2009/00583G06T7/0002G06T2207/30168G06T2207/30232
    • An apparatus for detecting a camera tampering, includes: an image capturing unit to capture at least one image; an input-edge-image generating unit to extract an edge image from an object displayed in the captured image and generate an input edge image by using the extracted edge image; a reference-edge-image generating unit to generate a reference edge image from the input edge image; a stolen-edge-image generating unit configured to generate a stolen edge image by substracting the input edge image from the reference edge image; and a tampering determining unit to compare the input edge image with the reference edge image, compare the reference edge image with the stolen edge image, and determine whether or not a camera tampering has occurred, based on a first similarity and a second similarity.
    • 一种用于检测相机篡改的装置,包括:图像捕获单元,用于捕获至少一个图像; 输入边缘图像生成单元,从拍摄图像中显示的对象中提取边缘图像,并使用所提取的边缘图像生成输入边缘图像; 参考边缘图像生成单元,用于从所述输入边缘图像生成参考边缘图像; 被配置为通过从所述参考边缘图像中减去所述输入边缘图像来生成被盗边缘图像的被盗边缘图像生成单元; 以及篡改确定单元,用于将输入边缘图像与参考边缘图像进行比较,将参考边缘图像与被盗边缘图像进行比较,并且基于第一相似度和第二相似度来确定相机篡改是否已经发生。
    • 6. 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。
    • 7. 发明授权
    • Detecting alteration of an image based on pattern information of color filter array
    • 基于滤色器阵列的图案信息检测图像的变化
    • US08983115B2
    • 2015-03-17
    • US13755832
    • 2013-01-31
    • Canon Kabushiki Kaisha
    • Ayuta Kawazu
    • G06K9/00G06K9/46G06T1/00
    • G06K9/46G06K2009/00583G06T1/0028G06T2201/0201
    • A CFA pattern is extracted from captured image data for each first unit region. A first altered region is detected from disturbance of the periodicity of the CFA pattern, and the first altered region is an image region in which copying has been performed from image data different from the captured image data to the captured image data. The feature amount of the captured image data is extracted for each second unit region different in size from the first unit region. The feature amounts are compared for each second unit region to detect a second altered region, and the second altered region is an image region in which copying has been performed from the captured image data to the captured image data. Information concerning the first and second altered regions are output as alteration detection results in the captured image data.
    • 从每个第一单位区域的捕获图像数据中提取CFA图案。 从CFA图案的周期性的干扰中检测第一改变区域,并且第一改变区域是其中已经从与捕获的图像数据不同的图像数据执行复制到图像数据的图像区域。 对于与第一单位区域不同的大小的第二单位区域,提取拍摄图像数据的特征量。 对于每个第二单位区域比较特征量以检测第二改变区域,并且第二改变区域是其中已经从捕获的图像数据执行复制到捕获的图像数据的图像区域。 关于第一和第二改变区域的信息作为捕获图像数据中的改变检测结果被输出。
    • 9. 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
    • US08577091B2
    • 2013-11-05
    • US12838952
    • 2010-07-19
    • Vladimir Iankov IvanovJohn S. Baras
    • Vladimir Iankov IvanovJohn S. Baras
    • G06K9/00G06K9/34
    • G06K9/00013G06K9/00577G06K2009/00583
    • A method and apparatus for authenticating a biometric scanner involves estimating unique intrinsic characteristics of the scanner (scanner pattern), that are permanent over time, and can identify a scanner even among scanners of the same manufacturer and model. Image processing and analysis are used to extract a scanner pattern from images acquired with the scanner. The scanner pattern is used to verify whether the scanner that acquired a particular image is the same as the scanner that acquired one or several images during enrollment of the biometric information. Authenticating the scanner can prevent subsequent security attacks using counterfeited biometric information on the scanner, or on the user authentication system.
    • 用于认证生物测定扫描仪的方法和装置包括估计扫描仪(扫描仪图案)的独特固有特征,其随着时间的推移是永久性的,并且即使在相同制造商和型号的扫描仪之间也能识别扫描仪。 图像处理和分析用于从使用扫描仪获取的图像中提取扫描仪图案。 扫描器图案用于验证获取特定图像的扫描仪是否与在注册生物特征信息期间获取一个或多个图像的扫描仪相同。 验证扫描仪可以防止在扫描仪或用户认证系统上使用伪造的生物特征信息的后续安全攻击。