GB1229794A - - Google Patents

Info

Publication number
GB1229794A
GB1229794A GB1229794DA GB1229794A GB 1229794 A GB1229794 A GB 1229794A GB 1229794D A GB1229794D A GB 1229794DA GB 1229794 A GB1229794 A GB 1229794A
Authority
GB
United Kingdom
Prior art keywords
screen
image
transparency
signal
scanning
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
Other languages
English (en)
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 filed Critical
Publication of GB1229794A publication Critical patent/GB1229794A/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
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
    • H04N1/4058—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern with details for producing a halftone screen at an oblique angle

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimile Scanning Arrangements (AREA)
GB1229794D 1967-06-20 1967-06-20 Expired GB1229794A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2834267 1967-06-20

Publications (1)

Publication Number Publication Date
GB1229794A true GB1229794A (enrdf_load_stackoverflow) 1971-04-28

Family

ID=10274166

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1229794D Expired GB1229794A (enrdf_load_stackoverflow) 1967-06-20 1967-06-20

Country Status (1)

Country Link
GB (1) GB1229794A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE1772687A1 (de) 1971-10-28
DE1772687B2 (de) 1972-06-29

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years