会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 8. 发明申请
    • METHOD AND APPARATUS FOR DOCUMENT SKEW AND SIZE/SHAPE DETECTION
    • 用于文件尺寸和尺寸/形状检测的方法和装置
    • WO1995012271A1
    • 1995-05-04
    • PCT/US1994012038
    • 1994-10-21
    • VISIONEER COMMUNICATIONS, INC.
    • VISIONEER COMMUNICATIONS, INC.PASCO, Richard, ClarkPAPUC, Sorin, VasileCOTTE, Pierre-Alain
    • H04N01/00
    • G06K9/3283G06K2209/01H04N1/00681H04N1/00708H04N1/00718H04N1/00721H04N1/00734H04N1/00745H04N1/00753H04N1/00766H04N1/3878
    • The present invention relates in general to optical scanning and image processing, and relates more particularly to a document imaging system which detects skew and/or detects size/shape of a document image. Preferred embodiments utilize a background with optical characteristics which contrast with those of the scanned document. In one embodiment, a document imaging system generates scanning signals in response to optical characteristics of a medium such as a sheet of paper, detects transitions in the scanning signal which define points along one or more edges of the medium, establishes a skew angle between the detected edges and a reference orientation, and compensates for skew by modifying the scanning signals as required such that the resultant skew angle is substantially equal to zero. In another embodiment, a document imaging system detects one or more edges of a document, defines a polygon having sides substantially congruent with the detected edges, and establishes the size of the document in response to the polygon.
    • 本发明一般涉及光学扫描和图像处理,更具体地涉及一种检测文档图像的偏斜和/或检测尺寸/形状的文档成像系统。 优选实施例利用具有与扫描文档的背景相反的光学特性的背景。 在一个实施例中,文档成像系统响应于介质(例如一张纸)的光学特性产生扫描信号,检测沿着介质的一个或多个边缘限定点的扫描信号中的转变,建立在 检测到的边缘和参考方向,并且通过根据需要修改扫描信号来补偿偏斜,使得所得到的斜角基本上等于零。 在另一个实施例中,文档成像系统检测文档的一个或多个边缘,定义具有与检测到的边缘基本一致的侧面的多边形,并响应于多边形确定文档的大小。