公开(公告)号：US20030058474A1

公开(公告)日：2003-03-27

申请号：US09962904

申请日：2001-09-25

Applicant: XEROX CORPORATION

Inventor： Robert P. Loce ,  Xiaoxue Cheng ,  Gregory W. Zack

IPC: H04N001/405 ,  H04N001/40

CPC classification number: G06K15/02 ,  G06K15/1807

Abstract: Characteristics of text or text components or features are considered when selecting halftoning screens. For example, an italic slant angle of text is recognized and used to select or generate a compatible halftone screen oriented at the same angle. A screen frequency may be selected based on a thickness of a text component. Descriptive tags associated with text or text components facilitate screen selection. Tags are assigned based on font descriptions included in a document during authoring. Alternatively, tags are assigned based on the results of document segmentation and character recognition techniques. An image processing system operative to consider characteristics of text or text components when selecting halftone screens includes a text component characteristic recognizer, a halftone screen selector and a halftoner. Optionally a print engine is also included. In a xerographic environment the print engine includes a xerographic printer.

Abstract translation: 当选择半色调屏幕时，会考虑文本或文本组件或特征的特征。 例如，文本的斜体斜角被识别并用于选择或生成以相同角度定向的兼容半色调屏幕。 可以基于文本分量的厚度来选择屏幕频率。 与文本或文本组件关联的描述性标签便于屏幕选择。 标签根据创作期间文档中包含的字体说明进行分配。 或者，基于文档分割和字符识别技术的结果分配标签。 当选择半色调网屏时，可以考虑文本或文本成分的特征的图像处理系统包括文本成分特征识别器，半色调屏幕选择器和半色调。 可选地，还包括打印引擎。 在静电复印环境中，打印引擎包括静电印刷机。