JPS5633770A - Optical character reading device - Google Patents

Optical character reading device

Info

Publication number
JPS5633770A
JPS5633770A JP10942579A JP10942579A JPS5633770A JP S5633770 A JPS5633770 A JP S5633770A JP 10942579 A JP10942579 A JP 10942579A JP 10942579 A JP10942579 A JP 10942579A JP S5633770 A JPS5633770 A JP S5633770A
Authority
JP
Japan
Prior art keywords
pattern
memory
image
filter
written
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP10942579A
Other languages
Japanese (ja)
Inventor
Yasuhiro Yamada
Shunkichi Tada
Kanji Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP10942579A priority Critical patent/JPS5633770A/en
Publication of JPS5633770A publication Critical patent/JPS5633770A/en
Pending legal-status Critical Current

Links

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  • Character Input (AREA)

Abstract

PURPOSE: To ensure a steady reading regardless of the type of the writing tool, by providing a band pass filter having such property as to transmits through part of the visible rays into the optical path.
CONSTITUTION: The infrared ray cut-off type filter 1-5 plus the filter 1-6 which cuts off the short wavelength side of the visible rays are inserted into the optical path. (The combined spectral transmission factor property of the filters 1-5 and 1-6 is shown by the curve 3-1.) the optical reading device 1-11 consists of the paper 1-2 with the pattern written on (including the reading subject pattern 1-3 and the pattern 1-4 written in the drop-out color), the photoelectric transducing part 1-12 (consisting of the light source 1-1, lenses 1-5 and 1-6, image-forming lens 1-7, image sensor 1-8, sensor amplifier 1-9 and A/D converter 1-10), the buffer memory 1-1 and the recognizing unit 1-14 each. The output of the part 1-12 is transferred successively to the memory 1-13. And the electrical image of the pattern is held in the memory 1-13 at the moment when the raster scanning completes for the pattern 1-3. Then the features of the pattern are extracted 1-14.
COPYRIGHT: (C)1981,JPO&Japio
JP10942579A 1979-08-28 1979-08-28 Optical character reading device Pending JPS5633770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10942579A JPS5633770A (en) 1979-08-28 1979-08-28 Optical character reading device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10942579A JPS5633770A (en) 1979-08-28 1979-08-28 Optical character reading device

Publications (1)

Publication Number Publication Date
JPS5633770A true JPS5633770A (en) 1981-04-04

Family

ID=14509911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10942579A Pending JPS5633770A (en) 1979-08-28 1979-08-28 Optical character reading device

Country Status (1)

Country Link
JP (1) JPS5633770A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818847A (en) * 1982-07-29 1989-04-04 Nippondenso Co., Ltd. Apparatus for optically reading printed information
JP2013115558A (en) * 2011-11-28 2013-06-10 Fujitsu Ltd Imaging apparatus and image recognition system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818847A (en) * 1982-07-29 1989-04-04 Nippondenso Co., Ltd. Apparatus for optically reading printed information
JP2013115558A (en) * 2011-11-28 2013-06-10 Fujitsu Ltd Imaging apparatus and image recognition system

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