Method and apparatus for automatic recognition of image and text

Details Method and apparatus for automatic recognition of image and text Method and apparatus for automatic recognition of image and text

1981-05-19

1983-10-18

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358282, G06K 936

Patent

active

044110154

ABSTRACT:
An apparatus and method for automatic recognition of image and text/graphics areas on a master undertake an opto-electronic scanning of the master with analog values obtained by the scanning being sampled and converted into digital information which is stored in a data field which is divided into a number of windows having edge lengths selected to be greater than the spacing between two successive lines of text. A grayscale value histogram is generated for each window and is statistically analyzed for determining whether the area of the master represented by the window is predominantly a text/graphics area or an image area based on known statistical characteristics generally related to each type of area.

REFERENCES:
patent: 3496543 (1970-02-01), Greenly
patent: 3662341 (1972-05-01), Baumgartner et al.
patent: 3805239 (1974-04-01), Watanabe
patent: 4119947 (1978-10-01), Leighton et al.
patent: 4162481 (1979-07-01), Du Vall
patent: 4208652 (1980-06-01), Marshall
patent: 4218673 (1980-08-01), Yoshida

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