SE345566B - - Google Patents

Info

Publication number
SE345566B
SE345566B SE768966A SE768966A SE345566B SE 345566 B SE345566 B SE 345566B SE 768966 A SE768966 A SE 768966A SE 768966 A SE768966 A SE 768966A SE 345566 B SE345566 B SE 345566B
Authority
SE
Sweden
Application number
SE768966A
Inventor
S Townsend
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 SE345566B publication Critical patent/SE345566B/xx

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)
SE768966A 1965-06-07 1966-06-03 SE345566B (fr)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
SE345566B true SE345566B (fr) 1972-05-29

Family

ID=23833574

Family Applications (1)

Application Number Title Priority Date Filing Date
SE768966A SE345566B (fr) 1965-06-07 1966-06-03

Country Status (3)

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

Also Published As

Publication number Publication date
NL6607863A (fr) 1966-12-08
GB1132450A (en) 1968-10-30
NL146014B (nl) 1975-05-15

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