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2. 发明授权

US08594384B2 Method and system for measuring text-rendering quality 有权
标题翻译：测量文本渲染质量的方法和系统
公开(公告)号：US08594384B2
公开(公告)日：2013-11-26
申请号：US12744912
申请日：2007-11-30
申请人： Ayelet Pnueli , Renato Keshet , Avi Schori , Yaron Ruckenstein
发明人： Ayelet Pnueli , Renato Keshet , Avi Schori , Gitit Ruckenstein
IPC分类号： G06K9/00
CPC分类号： G06T7/0002 , G06K9/036 , G06T2207/30168
摘要： Method embodiments of the present invention provide for semi-automated or fully automated assessment of the quality of device-rendered text, including graphical symbols, characters, and other printable or displayable patterns. Method embodiments of the present invention employ one or more metrics that involve the comparison of input characters, including text characters, symbols, and character-like graphics, with corresponding digital output characters obtained by capturing images of characters rendered by a character-rendering device. The one or more metrics include individual computed relative entropy APQi metrics, reflective of differences in character-to-character distance distributions between one input character c, and the set of input characters c*, a cumulative computed relative entropy APQ, stroke irregularity, contrast measure, sharpness, and background uniformity. These individual metrics can be computed and stored separately as well as output to a user of a character-rendering-quality measurement system, or may be combined together in various ways to produce one or more comprehensive, cumulative metrics for storage and output.
摘要翻译：本发明的方法实施例提供对设备渲染文本的质量的半自动或全自动评估，包括图形符号，字符和其他可打印或可显示的图案。本发明的方法实施例采用一种或多种度量，其涉及将包括文本字符，符号和字符状图形的输入字符与通过捕获由字符再现设备呈现的字符的图像获得的相应数字输出字符的比较。一个或多个指标包括单个计算的相对熵APQi度量，反映一个输入字符c与输入字符组c *之间的字符与字符之间的距离差异，累积计算的相对熵APQ，笔画不规则度，对比度测量，清晰度和背景均匀性。这些单独度量可被计算并分开存储以及输出到字符再现质量测量系统的用户，或者可以以各种方式组合在一起以产生用于存储和输出的一个或多个综合累积度量。

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