Image processing apparatus

Details Image processing apparatus Image processing apparatus

1996-05-01

1997-11-11

Rogers, Scott A.

Image analysis

Image segmentation

Distinguishing text from other regions

382257, G06K 934, G06K 936, G06K 946

Patent

active

056872526

ABSTRACT:
A binarization circuit binarizes a pixel signal indicative of an input image, using binarizing processing capable of preserving a gradation of a photograph image. A run expansion circuit performs processing for expanding black pixels included in a binary image to obtain runs, and outputting a run expansion signal. A labelling circuit integrates connected runs into an integrated region (a label) by means of a circumscribing-rectangle extraction circuit, and obtains the position and the size of a rectangle which circumscribes each integrated region, thereby outputting the obtained data as circumscribing-rectangle data. A determination circuit determines whether the integrated region is a text region or a photograph (continuous) region from the size and the configuration of the circumscribing rectangle, and outputs a determination signal.

REFERENCES:
patent: 5296939 (1994-03-01), Suzuki
patent: 5335290 (1994-08-01), Cullen et al.
patent: 5465304 (1995-11-01), Cullen et al.
K.Y. Wong et al., "Document Analysis System", IBM J. Res. Develop. 26(6): 647-656 (1982).

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