Method and apparatus for reading data pages on a data surface

Details Method and apparatus for reading data pages on a data surface Method and apparatus for reading data pages on a data surface

1987-12-22

1989-09-05

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 44, 382 48, G06K 932

Patent

active

048646300

ABSTRACT:
A method and apparatus for optically reading data in a substantially planar data field having a plurality of pages arranged in series of rows and columns. Each page is spaced apart from adjacent data pages by alignment-indicating streets, which are data-free blank areas. A CCD area array is positioned and spaced apart in generally parallel relation to the data field. The CCD area array is then moved linearly so that the array is opposite a data page to be read. An initial imaging thereafter takes placed in order to recognize the streets bordering a data page. Through recognition of the streets, a processor resolves the orientation of the data page relative to the CCD area array. The processor then transmits a command signal to a control circuit for rotational adjustment of the imaging of the data page.

REFERENCES:
patent: 3806643 (1974-04-01), Russell
patent: 4233625 (1980-11-01), Altman
patent: 4260979 (1981-04-01), Smith
patent: 4581649 (1986-04-01), Morokawa
patent: 4588261 (1986-05-01), Erhardt
patent: 4611232 (1986-09-01), Searby
patent: 4757550 (1988-07-01), Uga

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