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    • 78. 发明申请
    • Compressed document matching
    • 压缩文件匹配
    • US20050256857A1
    • 2005-11-17
    • US11169359
    • 2005-06-28
    • Dar-Shyang LeeJonathan Hull
    • Dar-Shyang LeeJonathan Hull
    • G06F7/00G06F17/30G06K9/20G06T7/00
    • G06K9/00442G06F17/30247G06F17/30657Y10S707/99936
    • An apparatus and method for determining if a query document matches one or more of a plurality of documents in a database. In a coarse matching stage, a compressed file or other query document is scanned to produce a bit profile. Global statistics such as line spacing and text height are calculated from the bit profile and used to narrow the field of documents to be searched in an image database. The bit profile is cross-correlated with bit profiles of documents in the search space to identify candidates for a detailed matching stage. If multiple candidates are generated in the coarse matching stage, a set of endpoint features is extracted from the query document for detailed matching in the detailed matching stage. Endpoint features contain sufficient information for various levels of processing, including page skew and orientation estimation. In addition, endpoint features are stable, symmetric and easily computable from commonly used compressed files including, but not limited to, CCITT Group 4 compressed files. Endpoint features extracted in the detailed matching stage are used to correctly identify a matching document in a high percentage of cases.
    • 一种用于确定查询文档是否匹配数据库中的多个文档中的一个或多个的装置和方法。 在粗匹配阶段,扫描压缩文件或其他查询文档以产生位配置文件。 全局统计信息(如行间距和文本高度)由位简档计算,用于缩小图像数据库中要搜索的文档的字段。 位配置文件与搜索空间中的文档的位配置文件交叉相关,以识别详细匹配阶段的候选项。 如果在粗匹配阶段生成多个候选,则在查询文档中提取一组端点特征,以便在详细匹配阶段进行详细匹配。 端点功能包含各种处理级别的足够信息,包括页面偏斜和方向估计。 另外,终端特征是稳定的,对称的,可以从常用的压缩文件中计算,包括但不限于CCITT Group 4压缩文件。 在详细匹配阶段提取的端点特征用于在高百分比的情况下正确识别匹配文档。
    • 79. 发明申请
    • Region of Interest Selector for Visual Queries
    • 视觉查询的兴趣区域选择器
    • US20110128288A1
    • 2011-06-02
    • US12853188
    • 2010-08-09
    • David PetrouZak CohenPin TingDar-Shyang Lee
    • David PetrouZak CohenPin TingDar-Shyang Lee
    • G06T3/40
    • G06K9/00664G06F16/434G06F16/438G06F16/532G06K9/2081
    • A client system receives an image such as a photograph, a screen shot, a scanned image, or a video frame. The image has a first resolution which is likely larger than a maximum resolution for visual queries. As such, if a visual query were created from the image some resolution would be lost. Instead, a user selects a region of interest within the image. The region of interest has a second resolution, which is smaller than the first resolution. The client system then creates a visual query from the region of interest. The visual query has a resolution no larger than a pre-defined maximum resolution for visual queries. Because the visual query is created from the region of interest rather, than the entire received image, most of the resolution is concentrated specifically on the region of interest. The visual query is then sent to a server system.
    • 客户端系统接收诸如照片,屏幕截图,扫描图像或视频帧的图像。 该图像具有可能大于视觉查询的最大分辨率的第一分辨率。 因此,如果从图像创建视觉查询,某些分辨率将会丢失。 相反,用户选择图像内的感兴趣区域。 感兴趣的区域有第二个分辨率,小于第一个分辨率。 然后,客户端系统从感兴趣的区域创建一个视觉查询。 视觉查询的分辨率不大于视觉查询的预定义最大分辨率。 因为视觉查询是从感兴趣的区域创建的,而不是整个收到的图像,大部分的分辨率都集中在感兴趣的区域上。 然后将视觉查询发送到服务器系统。