Apparatus for extracting a text region in a document image

Details Apparatus for extracting a text region in a document image Apparatus for extracting a text region in a document image

1991-04-01

1992-02-25

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 18, 382 48, 382 51, 358462, 358464, G06K 934

Patent

active

050919644

ABSTRACT:
A peripheral distribution of filled pixels in a document image is calculated by projecting the filled pixels in an X-axis or a Y-axis direction. A bottom part in the peripheral distribution is detected. The document image is divided into a plurality of primary image regions in accordance with a dividing line intersecting the bottom part in the X-axis or Y-axis direction, so that the document image is classified into text regions, drawing regions and picture regions. Thus, the text regions can be extracted automatically from the document image without requiring a specific manual operation for extracting text regions by an operator.

REFERENCES:
patent: 4403257 (1983-09-01), Hsieh
patent: 4447830 (1984-05-01), Stoffel
patent: 4741046 (1988-04-01), Matsunawa et al.

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