Method and apparatus for recording/reproducing mesh pattern data

Details Method and apparatus for recording/reproducing mesh pattern data Method and apparatus for recording/reproducing mesh pattern data

1990-05-30

1992-10-06

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 48, 382 58, 382 61, G06K 900

Patent

active

051539284

ABSTRACT:
Recorded data is read by an image sensor from a recording medium on which the data is two-dimensionally recorded in a mesh pattern, and the read data is stored in an image RAM. The stored data is subjected to data decoding and error correction to reproduce target data. A scanning reference pattern of a mesh pattern recorded on the recording medium serves as a guide when the stored recorded data read by the image sensor is reproduced by scanning in the image RAM. A reproduction apparatus has a capability of coping with a partial destruction of the scanning reference pattern. Error checking codes are added to the recording medium in addition to the target data. These items of data are recorded as an encoded image after being subjected to scrambling processing and randomization processing. The reproduction apparatus can easily cope with an error when the encoded image is reproduced.

REFERENCES:
patent: 4641357 (1987-02-01), Satoh
patent: 4783838 (1988-11-01), Matsunawa
patent: 4788598 (1988-11-01), Ochi et al.
patent: 4924078 (1990-05-01), Sant'Anselmo et al.
patent: 4972475 (1990-11-01), Sant'Anselmo
patent: 4972497 (1990-11-01), Saito
patent: 5038393 (1991-08-01), Nanba
Nihon Keizai Shimbun newspaper article, published by Nihon Keizai Shimbun, Tokyo, Japan, Apr. 10, 1992.

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