Construction of a free-formatted document image database system which adds

构建自由格式的文档图像数据库系统，其中添加了

基本信息

批准号：
03558007
负责人：
IKEDA Katsuo
金额：
$ 10.5万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03558007/
关键词：
Free Formatted Document Document Image Database Character Recognition Key Words デ-タベ-ス

项目摘要

The purpose of this research is to construct a document image database which can add keywords automatically to free-formatted document image data. Results of this research are as follows :Color document image processingWe proposed a method for extracting character patterns from color document images assuming that the characters in a sequence has a same color. For character patterns superposed on photographic images, another extraction method was proposed which uses the edges of character patterns. We also presented a method for extracting photographic regions using color information.Character pattern extraction from free-formatted document imagesWe proposed a method to make character pattern extraction more precise using character recognition and a word dictionary. A method was also developed for extraction of character pattern sequences with arbitrary slants. We defined a measure of the complexity of characters and related it to the lower bound of the resolution of characters for reliable character recognition.Document image retrieval methodsWe developed a fast and efficient searching algorithm for finding keywords form the storage of character candidates. A method was proposed for helping users finding adequate keywords with the use of automatically extracted words from document images. We also proposed and implemented an interface for retrieving multi media document images using abstract images.Distributed parallel processing for document image databasesA LAN-based distributed parallel processing environment was constructed for color document image database systems. In this environment, various processing, such as image processing, character recognition, structure analysis, and so on, are considered as modules and parallel execution of modules are implemented.

这项研究的目的是构建文档图像数据库，该数据库可以自动添加关键字到自由格式的文档图像数据。这项研究的结果如下：颜色文档图像加工我们提出了一种从彩色文档图像中提取字符模式的方法，假设序列中的字符具有相同的颜色。对于在摄影图像上超级伪造的字符模式，提出了另一种提取方法，该方法使用了字符模式的边缘。我们还提出了一种使用颜色信息提取摄影区域的方法。从自由格式的文档图像中提取图案图像我们提出了一种方法，提出了一种使用字符识别和单词词典使角色模式提取更精确的方法。还开发了一种用于提取具有任意斜率的字符模式序列的方法。我们定义了字符复杂性的度量，并将其与字符分辨率的下限相关联。提出了一种方法，可以帮助用户使用自动从文档图像中提取的单词来找到足够的关键字。我们还建议并实现了一个接口，用于使用抽象图像检索多媒体文档图像。为文档图像databesa lan的分布并行处理基于颜色文档图像数据库系统构建了基于文档图像数据库LAN的分布式并行处理环境。在这种环境中，将各种处理（例如图像处理，角色识别，结构分析等）视为模块和平行执行模块的执行。