Two-dimensional code reader

Details Two-dimensional code reader Two-dimensional code reader

1997-08-22

2000-06-27

Couso, Jose L.

Image analysis

Image sensing

382313, 382318, 235494, G06K 700

Patent

active

060816279

ABSTRACT:
A two-dimensional code reader for precisely and fast reading a two-dimensional code image containing luminance unevenness caused by variations in illumination, etc. To binarize cells, first the gray levels of the pixels at the center points of the cells are extracted, a local threshold value is found only from the extracted gray levels, and the gray levels are compared with the local threshold value, thereby binarizing the cells.

REFERENCES:
patent: 5726435 (1998-03-01), Hara et al.

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