Feature extraction system for identifying text within a table im

Details Feature extraction system for identifying text within a table im Feature extraction system for identifying text within a table im

1995-08-11

1998-12-08

Chang, Jon

Image analysis

Image segmentation

Distinguishing text from other regions

382180, G06K 936

Patent

active

058481869

ABSTRACT:
In a feature extraction system for analyzing image data of an input document image, a feature extraction method identifies image data as a table image and identifies text image within the table image by performing the steps of inputting image data of a document page, performing block selection processing on the document page, the block selection process identifies and separates the image data into blocks having the same image type, identifying table image data based on the separated blocks of image data, identifying text blocks within the table image data, horizontally sorting all text blocks located in the table image data based on horizontal position information, vertically sorting all text blocks located in the table image data based on vertical position information, separating text blocks into rows and columns based on a result of the vertical and the horizontal sorting steps, assigning column and row address coordinates to each text block in the table image data based on the separating step, and storing the assigned address of each text block.

REFERENCES:
patent: 4905185 (1990-02-01), Sakai
patent: 5048107 (1991-09-01), Tachikawa
patent: 5075895 (1991-12-01), Bessho
patent: 5111514 (1992-05-01), Ohta
patent: 5295000 (1994-03-01), Nonoshita
patent: 5588072 (1996-12-01), Wang

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