IT1145660B - Binary coding of photodetector signals for character recognition appts - Google Patents

Binary coding of photodetector signals for character recognition appts

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Publication number
IT1145660B
IT1145660B IT8049282A IT4928280A IT1145660B IT 1145660 B IT1145660 B IT 1145660B IT 8049282 A IT8049282 A IT 8049282A IT 4928280 A IT4928280 A IT 4928280A IT 1145660 B IT1145660 B IT 1145660B
Authority
IT
Italy
Prior art keywords
signals
appts
character recognition
binary coding
matrix
Prior art date
Application number
IT8049282A
Other languages
Italian (it)
Other versions
IT8049282A0 (en
Inventor
Sakamoto Fukuma
Isshiki Isao
Tanaka Masatoshi
Satoh Koji
Ohoka Akihiro
Original Assignee
Sumitomo Electric Industries
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP54092311A external-priority patent/JPS60710B2/en
Priority claimed from JP9931479U external-priority patent/JPS605411Y2/en
Priority claimed from JP11260279A external-priority patent/JPS5636772A/en
Application filed by Sumitomo Electric Industries filed Critical Sumitomo Electric Industries
Publication of IT8049282A0 publication Critical patent/IT8049282A0/en
Application granted granted Critical
Publication of IT1145660B publication Critical patent/IT1145660B/en

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Abstract

The analogue output of a matrix of photo detectors used for alpha numeric character identification reading, is converted into a binary coded format with correction made for background conditions. The photo detectors (1) are arranged in a matrix and the signals from each column are processed by level control stages (13), that perform a correction for angle of inclination between the object (2) and the detectors. The generated signals are subjected to a comparison process (15) to produce a reference voltage (Vref), corrected for background intensity. Comparators (14) generate equivalent binary signals (B) for input to an identification stage.
IT8049282A 1979-07-20 1980-07-21 Binary coding of photodetector signals for character recognition appts IT1145660B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP54092311A JPS60710B2 (en) 1979-07-20 1979-07-20 Binarization circuit
JP9931479U JPS605411Y2 (en) 1979-07-20 1979-07-20 Binarization circuit
JP11260279A JPS5636772A (en) 1979-09-03 1979-09-03 Binary coding circuit

Publications (2)

Publication Number Publication Date
IT8049282A0 IT8049282A0 (en) 1980-07-21
IT1145660B true IT1145660B (en) 1986-11-05

Family

ID=27307002

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8049282A IT1145660B (en) 1979-07-20 1980-07-21 Binary coding of photodetector signals for character recognition appts

Country Status (1)

Country Link
IT (1) IT1145660B (en)

Also Published As

Publication number Publication date
IT8049282A0 (en) 1980-07-21

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Effective date: 19970730