GB1132450A - Transmitting unit for facsimile communication system - Google Patents

Transmitting unit for facsimile communication system

Info

Publication number
GB1132450A
GB1132450A GB2447266A GB2447266A GB1132450A GB 1132450 A GB1132450 A GB 1132450A GB 2447266 A GB2447266 A GB 2447266A GB 2447266 A GB2447266 A GB 2447266A GB 1132450 A GB1132450 A GB 1132450A
Authority
GB
United Kingdom
Prior art keywords
signal
background
photo
intensity
multiplier
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.)
Expired
Application number
GB2447266A
Other languages
English (en)
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.)
Xerox Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Publication of GB1132450A publication Critical patent/GB1132450A/en
Expired 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
    • H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4072—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on the contents of the original
    • 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
    • H04N1/40056—Circuits for driving or energising particular reading heads or original illumination means
    • 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
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimiles In General (AREA)
GB2447266A 1965-06-07 1966-06-01 Transmitting unit for facsimile communication system Expired GB1132450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US46169365A 1965-06-07 1965-06-07

Publications (1)

Publication Number Publication Date
GB1132450A true GB1132450A (en) 1968-10-30

Family

ID=23833574

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2447266A Expired GB1132450A (en) 1965-06-07 1966-06-01 Transmitting unit for facsimile communication system

Country Status (3)

Country Link
GB (1) GB1132450A (cs)
NL (1) NL146014B (cs)
SE (1) SE345566B (cs)

Also Published As

Publication number Publication date
NL146014B (nl) 1975-05-15
SE345566B (cs) 1972-05-29
NL6607863A (cs) 1966-12-08

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