Information reproduction system which feedback controls a pulse

Details Information reproduction system which feedback controls a pulse Information reproduction system which feedback controls a pulse

1997-10-08

2000-05-02

Couso, Jose L.

Image analysis

Image sensing

Optical

G06K 920

Patent

active

060582251

ABSTRACT:
A period extracting section extracts a specific period in a dot code in an image signal corresponding to the dot code, and this specific period is supplied field by field to a maximum value detection section and a minimum value detection section via a detection gate. A threshold value detection section computes the binary threshold value from the detected field-by-field maximum value and minimum value, and holds it in a data holding section. A comparator compares the held threshold value with an image signal with the dot period emphasized by a signal processor to thereby binarize the image signal corresponding to the dot code.

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