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1. 发明授权

US06434276B1 Image synthesis and communication apparatus 失效
公开(公告)号：US06434276B1
公开(公告)日：2002-08-13
申请号：US09162024
申请日：1998-09-28
申请人： Masashi Hirosawa , Yasuhisa Nakamura , Hiroshi Akagi , Shiro Ida
发明人： Masashi Hirosawa , Yasuhisa Nakamura , Hiroshi Akagi , Shiro Ida
IPC分类号： G06K936
摘要： In the case where an image of a document or the like is taken by an economical camera in a TV conference system and the image is transmitted and received through a communication line, when an image of the whole of the document is taken, small characters are defaced and illegible, and, when an imaging operation is performed with a resolution at which characters are readable, it is impossible to take an image of the whole of the document. An image F1 at time T1 which is taken while moving an imaging section is captured into an image storing section and a feature point extracting section. The feature point extracting section extracts feature points of the image F1. An image F2 at time T2 when the subsequent frame is started is captured into the image storing section and the feature point extracting section. The image F2 in a region designated by a search range determining section, and the feature points of the image F1 are subject to a calculation in a correlation calculating section, to obtain a motion amount, and then a high-resolution image is synthesized.

2. 发明授权

US5381241A Method for discriminating between figure and text areas of an image 失效
标题翻译：用于区分图像的图形和文本区域的方法
公开(公告)号：US5381241A
公开(公告)日：1995-01-10
申请号：US928012
申请日：1992-08-11
申请人： Seido Kawanaka , Shiro Ida , Hideo Takemura , Kouji Kumetani
发明人： Seido Kawanaka , Shiro Ida , Hideo Takemura , Kouji Kumetani
IPC分类号： H04N1/40
CPC分类号： H04N1/40062
摘要： The present invention relates to a method for discriminating between figure areas, e.g., half-tone photographs, drawings and the like, and text areas in an image. More specifically, an image is processed to determine the difference between maximum and minimum brightnesses in convolutions thereof. When the difference between the maximum and minimum brightnesses is less than or equal to a predetermined level, the center pixel in the convolution is determined to be a half-tone pixel. A half-tone area is detected by determining areas of the image having at least a predetermined number of half-tone pixels. In another aspect of the invention, contiguous areas of the image having fewer than a predetermined number of configuration pixels are determined to be vacant areas having neither figure nor character information.
摘要翻译：本发明涉及用于区分图形区域的方法，例如半色调照片，图形等以及图像中的文本区域。更具体地，处理图像以确定其卷积中的最大和最小亮度之间的差。当最大亮度和最小亮度之间的差小于或等于预定水平时，卷积中的中心像素被确定为半色调像素。通过确定具有至少预定数量的半色调像素的图像的区域来检测半色调区域。在本发明的另一方面，具有少于预定数量的配置像素的图像的连续区域被确定为不具有图形和字符信息的空闲区域。

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