公开(公告)号：US5317646A

公开(公告)日：1994-05-31

申请号：US856434

申请日：1992-03-24

申请人： Henry W. Sang, Jr. ,  Whei-Tsu H. Tahn ,  Xiao B. Zhang

发明人： Henry W. Sang, Jr. ,  Whei-Tsu H. Tahn ,  Xiao B. Zhang

IPC分类号： G06K9/62 ,  G06K9/34 ,  G06K9/20 ,  G06K9/64 ,  G06K9/68

CPC分类号： G06K9/6253

摘要： A forms recognition system having a method which assists an operator in creating an electronic template. The automated method would allow an operator to view an electronic bitmap of a master or blank form on a graphical display, the master form having bounded or semi-bounded regions depicting fields. An operator would display the bitmap, select a single point within a bounded or semi-bounded region on the bitmap with a pointing device, and the coordinates representing the bounded region would be automatically determined using the single point selected by the operator.

摘要翻译： 具有帮助操作者创建电子模板的方法的表单识别系统。 自动化方法将允许操作者在图形显示器上观看主或空白表单的电子位图，主表格具有描绘字段的有界或半边界区域。 操作员将显示​​位图，使用指点设备在位图上的有界区域或半边界区域中选择单个点，并且使用运算符选择的单个点自动确定表示有界区域的坐标。

公开(公告)号：US5245165A

公开(公告)日：1993-09-14

申请号：US814841

申请日：1991-12-27

申请人： Xiao B. Zhang

发明人： Xiao B. Zhang

IPC分类号： G06K1/12 ,  G06K7/14 ,  G06K19/00 ,  G06K19/06

CPC分类号： G06K7/143 ,  G06K19/06037 ,  G06K7/14

摘要： A self-clocking glyph code is provided for encoding dual bit digital values in the cardinal rotations (0.degree., 90.degree., 180.degree. and 270.degree.) of a logically ordered sequence of wedge-shaped glyphs that are written, printed, or otherwise recorded on a hardcopy recording medium in accordance with a predetermined spatial formatting rule. For example, these wedge-shaped glyphs suitably are essentially identical right triangles. The widths of such glyphs vary unidirectionally as a function of their height, so they can be decoded reliably, even when they are degraded by scan errors, dropped scan lines and/or random noise patterns. The decoding can be carried out in a variety of different ways, including by means of a bounding box analysis of the glyphs to determine whether the center of mass of each glyph is in the upper right, upper left, lower right or lower left quadrant of its bounding box; or by means of a bounding box analysis of the glyphs to determine whether the inclined surface of each wedge is on its right-hand side or its left-hand side and tilted to the right or left; or by means of a comparative run length analysis of each of the glyphs to determine whether its shortest run of adjacent ON pixels is spatially located above or below, and to the right or left of center of, its longest run of adjacent ON pixels.

摘要翻译： 提供自定时字形码，用于对写入，打印或以其他方式记录的楔形字形的逻辑顺序序列的基数旋转（0°，90°，180°和270°）的双位数字值进行编码 根据预定的空间格式化规则在硬拷贝记录介质上。 例如，这些楔形字形适当地基本上是相同的直角三角形。 这些字形的宽度作为其高度的函数单向变化，因此即使当它们被扫描错误，丢弃的扫描线和/或随机噪声模式降级时，它们也可被可靠地解码。 解码可以以各种不同的方式进行，包括通过对字形的边界框分析来确定每个字形的质心是否在右上，左上，右下或左下象限 它的边框; 或者通过对字形的边界框分析来确定每个楔形物的倾斜表面是在其右侧还是右侧或左侧倾斜; 或者通过每个字形的比较运行长度分析来确定其相邻ON像素的最短行距是否在空间上位于其相邻ON像素的最长行程的中心的上方或下方以及其中心的右侧或左侧。