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    • 2. 发明申请
    • CLUSTERING IMAGES BASED ON CAMERA FINGERPRINTS
    • US20180253626A1
    • 2018-09-06
    • US15757279
    • 2016-09-05
    • Functional Technologies Ltd.
    • Xufeng LinChang-Tsun Li
    • G06K9/62G06K9/00
    • G06K9/6223G06K9/0051G06K9/00577G06K9/40G06K9/6218G06K9/6221G06K2009/00583
    • A method of analysing a set of digital images each having been captured with a digital camera, the method comprising, using at least one processor: a) extracting a camera fingerprint from each image so as to form a set of camera fingerprints, each camera fingerprint being representative of the camera used to capture the image, and being of a first dimension; b) forming a set of dimensionally reduced camera fingerprints from each camera fingerprint, the dimensionally reduced camera fingerprint being of a second dimension smaller than the first dimension; c) forming a first subset of dimensionally reduced camera fingerprints and a second subset of dimensionally reduced camera fingerprints; d) determining a level of similarity between every pairing of the dimensionally reduced camera fingerprints of the first subset; e) determining a level of similarity between every pairing of the dimensionally reduced camera fingerprints of the second subset; f) determining a level of similarity between every pairing of, on the one hand, the dimensionally reduced fingerprints of the first set and, on the other hand, the dimensionally reduced fingerprints of the second subset; g) recording those pairings which indicate a comparatively higher level of similarity; h) substituting for the contents of the first subset those dimensionally reduced camera fingerprints of the first and second subsets which have been recorded as part of a pairing showing a comparatively higher level of similarity; i) substituting for the contents of the second subset a different subset of the set of the dimensionally reduced camera fingerprints; j) repeating steps (e) to (i), typically until all of the dimensionally reduced camera fingerprints have been processed; k) performing a clustering algorithm on all dimensionally reduced camera fingerprints based on the pairings having a comparatively higher level of similarity to produce a plurality of first clusters each comprising a set of dimensionally reduced camera fingerprints; l) for each of the first clusters, determining a level of similarity between each of the camera fingerprints corresponding to the dimensionally reduced camera fingerprints of that cluster; and m) splitting and merging the coarse clusters dependent upon the similarities between the camera fingerprints to form a plurality of second clusters.
    • 8. 发明申请
    • GROUPING FACE IMAGES USING STATISTIC DISTRIBUTION ESTIMATE
    • 使用统计分布估计对脸部图像进行分组
    • US20150324630A1
    • 2015-11-12
    • US14272809
    • 2014-05-08
    • Shutterfly, Inc.
    • Roman SandlerAlexander M. Kenis
    • G06K9/00G06K9/52G06K9/62
    • G06K9/00228G06K9/00288G06K9/52G06K9/6215G06K9/6221G06K9/6267G06K9/66
    • A computer-implemented method for sorting face images of different individuals into different groups includes obtaining face images comprising faces of unknown individuals by a computer processor; calculating similarity functions between pairs of face images by the computer processor; joining face images that have values of the similarity functions above a predetermined threshold into a hypothetical face group, wherein the face images in the hypothetical face group hypothetically belong to a same person; conducting non-negative matrix factorization on values of the similarity functions in the hypothetical face group to test truthfulness of the hypothetical face group; and identifying the hypothetical face group as a true face group if a percentage of the associated similarity functions being true is above a threshold based on the non-negative matrix factorization.
    • 用于将不同个体的面部图像分类为不同组的计算机实现的方法包括:通过计算机处理器获取包括未知个体的面部的面部图像; 通过计算机处理器计算人脸图像之间的相似度函数; 将具有高于预定阈值的相似度函数的面部图像连接到假想面部组中,其中假设面部组中的面部图像假设属于同一个人; 对假想面部组中相似度函数的值进行非负矩阵分解,以测试假想面部群体的真实性; 并且如果所述相关联的相似度函数的百分比为真,则将所述假想面部群体识别为真面团,基于所述非负矩阵因子分解,高于阈值。