BE766778A - CIRCUIT FOR DIFFERENTIATION OF BACKGROUND RANGES AND INFORMATION OF A DOCUMENT - Google Patents

CIRCUIT FOR DIFFERENTIATION OF BACKGROUND RANGES AND INFORMATION OF A DOCUMENT

Info

Publication number
BE766778A
BE766778A BE766778A BE766778A BE766778A BE 766778 A BE766778 A BE 766778A BE 766778 A BE766778 A BE 766778A BE 766778 A BE766778 A BE 766778A BE 766778 A BE766778 A BE 766778A
Authority
BE
Belgium
Prior art keywords
differentiation
document
circuit
information
ranges
Prior art date
Application number
BE766778A
Other languages
French (fr)
Inventor
D R Shuey
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 BE766778A publication Critical patent/BE766778A/en

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
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original
BE766778A 1970-05-06 1971-05-06 CIRCUIT FOR DIFFERENTIATION OF BACKGROUND RANGES AND INFORMATION OF A DOCUMENT BE766778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3504870A 1970-05-06 1970-05-06

Publications (1)

Publication Number Publication Date
BE766778A true BE766778A (en) 1971-11-08

Family

ID=21880306

Family Applications (1)

Application Number Title Priority Date Filing Date
BE766778A BE766778A (en) 1970-05-06 1971-05-06 CIRCUIT FOR DIFFERENTIATION OF BACKGROUND RANGES AND INFORMATION OF A DOCUMENT

Country Status (7)

Country Link
JP (1) JPS5244171B1 (en)
BE (1) BE766778A (en)
CA (1) CA942679A (en)
DE (1) DE2122481C2 (en)
FR (1) FR2088395B1 (en)
GB (1) GB1310337A (en)
NL (1) NL7105991A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56123176A (en) * 1980-03-05 1981-09-28 Ricoh Co Ltd Processing method for picture signal

Also Published As

Publication number Publication date
CA942679A (en) 1974-02-26
FR2088395B1 (en) 1976-12-03
GB1310337A (en) 1973-03-21
DE2122481C2 (en) 1983-08-04
JPS5244171B1 (en) 1977-11-05
FR2088395A1 (en) 1972-01-07
NL7105991A (en) 1971-11-09
DE2122481A1 (en) 1971-11-25

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