Table region identification method

Details Table region identification method Table region identification method

1990-06-05

1991-09-10

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 22, 382 61, 382 9, 3642253, 358462, G06K 900

Patent

active

050481070

ABSTRACT:
A method for identifying a table region within an input image data of an original obtained by an optical character reader. The table region identification method comprises the steps of extracting first sets of runs of successive black picture elements from each of the lines of the input image data, unifying adjacent runs among the first sets of the runs into first rectangles, unifying second sets of runs within a second rectangle having a size greater than a prescribed size among the thus unified first rectangles to extract ruled lines, the second sets of the runs having a length greater than a prescribed length, and finally making a decision on whether the second rectangle constitutes a table region or any other region depending on the number of the ruled lines counted.

REFERENCES:
patent: 4723298 (1988-02-01), Schiller
patent: 4901365 (1990-02-01), Kelland
patent: 4932065 (1990-06-01), Feldgajer
patent: 4933979 (1990-06-01), Suzuki et al.

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