Image analysis – Image sensing – Sensor control
Patent
1998-03-11
2000-10-03
Couso, Jose L.
Image analysis
Image sensing
Sensor control
G06K 920
Patent
active
061284203
ABSTRACT:
A stationary data symbol reader includes a CCD, lens, CCD drive circuit, amplification circuit, binarization circuit, memory, CPU, light sources, light source drive circuit, communication driver, switch circuit and trigger switch. When reading, a frame image capture is carried out, and a number of picture elements of the fields of the frame corresponding to the displacement of an authenticator pattern (associated with the data symbol) between a second field image and a first field image is calculated. The moving speed of the data symbol is calculated from the displacement. The optimal light exposure time is calculated from the moving speed, and the optimal intensity of illumination is calculated from the exposure time.
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Ishizuka Yukihiro
Nukui Makoto
Seo Shuzo
Shin Takeharu
Tani Nobuhiro
Asahi Kogaku Kogyo Kabushiki Kaisha
Couso Jose L.
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