JPS57160266A - Detecting system of picture concentration - Google Patents

Detecting system of picture concentration

Info

Publication number
JPS57160266A
JPS57160266A JP56045591A JP4559181A JPS57160266A JP S57160266 A JPS57160266 A JP S57160266A JP 56045591 A JP56045591 A JP 56045591A JP 4559181 A JP4559181 A JP 4559181A JP S57160266 A JPS57160266 A JP S57160266A
Authority
JP
Japan
Prior art keywords
concentration
picture
recorded
recording
pattern
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
JP56045591A
Other languages
Japanese (ja)
Inventor
Susumu Sugiura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56045591A priority Critical patent/JPS57160266A/en
Publication of JPS57160266A publication Critical patent/JPS57160266A/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
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Color, Gradation (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To attain an accurate detection of the mean picture concentration for a recorder of half tone picture, by detecting the picture concentration with a detecting means set opposite to an object to be recorded. CONSTITUTION:The detecting means 85 and 87 incorporating an aperture APT having the opening area according to the area occupied by the unit picture element on an object to be recorded are set opposite to the object to be recorded to detect the picture concentration. Thus a test concentration pattern which is recorded directly from a device that records the pattern on the recording paper by means of a recording agent to be actually used for the recording is set in the minimum area on the recording paper. Furthermore, the concentration is read in an assured way.
JP56045591A 1981-03-30 1981-03-30 Detecting system of picture concentration Pending JPS57160266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56045591A JPS57160266A (en) 1981-03-30 1981-03-30 Detecting system of picture concentration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56045591A JPS57160266A (en) 1981-03-30 1981-03-30 Detecting system of picture concentration

Publications (1)

Publication Number Publication Date
JPS57160266A true JPS57160266A (en) 1982-10-02

Family

ID=12723585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56045591A Pending JPS57160266A (en) 1981-03-30 1981-03-30 Detecting system of picture concentration

Country Status (1)

Country Link
JP (1) JPS57160266A (en)

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