1996-03-06
1998-03-03
Baker, Stephen M.
Excavating
371 48, G06K 938
Patent
active
057243646
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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Mori Takeshi
Tamiya Kosei
Baker Stephen M.
Olympus Optical Co,. Ltd.
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