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

1982-01-26

1985-03-12

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358282, 382 9, G06K 936

Patent

active

045049726

ABSTRACT:
A method and apparatus for automatically recognizing the presence of an image area and a text or graphics area on a printed master which is being examined for determination of the textual content thereof employ an optoelectronic video scanner, the scanned values obtained therefrom being digitized and stored in a memory. The input master is schematically divided into small overlapping windows and a number of length of run histograms are generated by a computer for each such window. The particular characteristics of each of the histograms are examined for determination as to whether the histograms correspond to a text or graphics area or an image area of printed material on the master.

REFERENCES:
patent: 3805237 (1974-04-01), Cobb et al.
patent: 3805239 (1974-04-01), Watanabe
patent: 3845466 (1974-10-01), Hong
patent: 3935562 (1976-01-01), Stephens
patent: 4208652 (1980-06-01), Marshall
patent: 4251799 (1981-02-01), Jih
patent: 4323880 (1982-04-01), Lucas
patent: 4377803 (1983-03-01), Lotspiech et al.
patent: 4411015 (1983-10-01), Scherl et al.
Bishop et al., "Char. Rec. Approach Involving Histogram Class.", IBM Tech. Disclosure Bulletin, vol. 21, No. 9, Feb. 1979, pp. 3461-3467.

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