JPS5685975A - Uniform illumination method - Google Patents

Uniform illumination method

Info

Publication number
JPS5685975A
JPS5685975A JP16250579A JP16250579A JPS5685975A JP S5685975 A JPS5685975 A JP S5685975A JP 16250579 A JP16250579 A JP 16250579A JP 16250579 A JP16250579 A JP 16250579A JP S5685975 A JPS5685975 A JP S5685975A
Authority
JP
Japan
Prior art keywords
read
illumination
correction function
distribution
uniform illumination
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
JP16250579A
Other languages
Japanese (ja)
Inventor
Masahito Nakajima
Katsumi Fujiwara
Tetsuo Hizuka
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16250579A priority Critical patent/JPS5685975A/en
Publication of JPS5685975A publication Critical patent/JPS5685975A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To supply a uniform illumination to the object to be read, by correcting the illumination distribution of the illumination light source by the illumination distribution which is obtained from the object to be read. CONSTITUTION:In case when the object to be read 45 is read by the TV camera 41, the read result (c) is A/D-converted by the illumination distribution (a) on the surface of the object 45, and the sensitivity distribution (b) of the TV camera 41, moreover it is converted to a reciprocal, and it is stored in the correction function memory 48 as a correction function. The driver 49 modulates brightness by the place of the planar illumination light source by use of the correction function of the correction function memory 48, so that the information on the surface of the object 45 can be read with uniform intensity of illumination, as the illumination distribution (d) which has been corrected.
JP16250579A 1979-12-14 1979-12-14 Uniform illumination method Pending JPS5685975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16250579A JPS5685975A (en) 1979-12-14 1979-12-14 Uniform illumination method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16250579A JPS5685975A (en) 1979-12-14 1979-12-14 Uniform illumination method

Publications (1)

Publication Number Publication Date
JPS5685975A true JPS5685975A (en) 1981-07-13

Family

ID=15755887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16250579A Pending JPS5685975A (en) 1979-12-14 1979-12-14 Uniform illumination method

Country Status (1)

Country Link
JP (1) JPS5685975A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147666A (en) * 1984-12-21 1986-07-05 Toshiba Corp Optical image reader
JPS62143355U (en) * 1986-03-03 1987-09-10
JPS62196460U (en) * 1986-06-03 1987-12-14
JPH01146460A (en) * 1987-12-02 1989-06-08 Sharp Corp Picture reader
US5739928A (en) * 1991-09-12 1998-04-14 Eastman Kodak Company Technique particularly suited for use in a print preview function for adapting CRT colorimetry to ambient lighting conditions
US20140028857A1 (en) * 2011-04-29 2014-01-30 Siemens Healthcare Diagnostics Inc. High flux collimated illuminator and method of uniform field illumination

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147666A (en) * 1984-12-21 1986-07-05 Toshiba Corp Optical image reader
JPS62143355U (en) * 1986-03-03 1987-09-10
JPS62196460U (en) * 1986-06-03 1987-12-14
JPH01146460A (en) * 1987-12-02 1989-06-08 Sharp Corp Picture reader
US5739928A (en) * 1991-09-12 1998-04-14 Eastman Kodak Company Technique particularly suited for use in a print preview function for adapting CRT colorimetry to ambient lighting conditions
US20140028857A1 (en) * 2011-04-29 2014-01-30 Siemens Healthcare Diagnostics Inc. High flux collimated illuminator and method of uniform field illumination

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