Image processing system which converts multi-value image data in

Details Image processing system which converts multi-value image data in Image processing system which converts multi-value image data in

1996-11-18

2000-04-25

Boudreau, Leo H.

Image analysis

Image compression or coding

Gray level to binary coding

382173, 382176, 382321, G06K 936

Patent

active

060553367

ABSTRACT:
An optical character recognition system recognizes character images in a document image comprised of character areas and non-character areas. The system includes a step of obtaining multi-value image data representing the document image, the multi-value image data having a first resolution and comprising plural pixels each having a pixel density value. The system binarizes the multi-value image data to produce binary image data having a second resolution for the document image, the second resolution being greater than the first resolution. The target pixel in the multi-value image data is binarized based on pixels adjacent to the target pixel. The system further includes steps for performing block selection on the binary image data for the document image in order to identify character areas of the document image and non-character areas of the document image, and performing optical character recognition processing on binary image data for the character areas of the document image to obtain computer codes for recognized character images in the character areas.

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