IT1274608B - Metodo di elaborazione di immagini video bitonali e relativo dispositivo - Google Patents

Metodo di elaborazione di immagini video bitonali e relativo dispositivo

Info

Publication number
IT1274608B
IT1274608B ITMI941730A ITMI941730A IT1274608B IT 1274608 B IT1274608 B IT 1274608B IT MI941730 A ITMI941730 A IT MI941730A IT MI941730 A ITMI941730 A IT MI941730A IT 1274608 B IT1274608 B IT 1274608B
Authority
IT
Italy
Prior art keywords
bitonal
processing
video images
pixels
related device
Prior art date
Application number
ITMI941730A
Other languages
English (en)
Inventor
Marcello Niccolini
Original Assignee
Infotronic Spa
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 Infotronic Spa filed Critical Infotronic Spa
Priority to ITMI941730A priority Critical patent/IT1274608B/it
Publication of ITMI941730A0 publication Critical patent/ITMI941730A0/it
Priority to EP95929816A priority patent/EP0792552A1/en
Priority to PCT/EP1995/003143 priority patent/WO1996005692A1/en
Publication of ITMI941730A1 publication Critical patent/ITMI941730A1/it
Application granted granted Critical
Publication of IT1274608B publication Critical patent/IT1274608B/it

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
    • H04N1/40075—Descreening, i.e. converting a halftone signal into a corresponding continuous-tone signal; Rescreening, i.e. combined descreening and halftoning

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Storing Facsimile Image Data (AREA)
  • Editing Of Facsimile Originals (AREA)

Abstract

Un metodo di elaborazione e memorizzazione di immagini video bitonali, comprendenti matrici digitali campionate di pixels neri e bianchi appartenenti ad un'immagine sorgente (IS) destinata ad essere compresa per essere trasmessa e/o visualizzata con un numero ridotto di pixel, prevede che almeno una matrice dell'immagine sorgente (IS), avente predeterminate dimensioni, venga compresa in un solo pixel destinazione (ID) avente un livello di grigio corrispondente al rapporto fra il numero di pixel neri ed il numero di pixel bianchi della matrice. In questo modo viene mantenuta la qualità dell'immagine e garantita la sua leggibilità.
ITMI941730A 1994-08-09 1994-08-09 Metodo di elaborazione di immagini video bitonali e relativo dispositivo IT1274608B (it)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ITMI941730A IT1274608B (it) 1994-08-09 1994-08-09 Metodo di elaborazione di immagini video bitonali e relativo dispositivo
EP95929816A EP0792552A1 (en) 1994-08-09 1995-08-08 Method of processing video bitonal images
PCT/EP1995/003143 WO1996005692A1 (en) 1994-08-09 1995-08-08 Method of processing video bitonal images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI941730A IT1274608B (it) 1994-08-09 1994-08-09 Metodo di elaborazione di immagini video bitonali e relativo dispositivo

Publications (3)

Publication Number Publication Date
ITMI941730A0 ITMI941730A0 (it) 1994-08-09
ITMI941730A1 ITMI941730A1 (it) 1996-02-09
IT1274608B true IT1274608B (it) 1997-07-18

Family

ID=11369469

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI941730A IT1274608B (it) 1994-08-09 1994-08-09 Metodo di elaborazione di immagini video bitonali e relativo dispositivo

Country Status (3)

Country Link
EP (1) EP0792552A1 (it)
IT (1) IT1274608B (it)
WO (1) WO1996005692A1 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7515758B2 (en) 2004-02-03 2009-04-07 International Business Machines Corporation Black white image compression having print density control
US7830552B2 (en) * 2005-04-15 2010-11-09 International Business Machines Corporation Black white image scaling having print density control and polarity detection

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4528693A (en) * 1982-09-30 1985-07-09 International Business Machines Corporation Apparatus and method for scaling facsimile image data
NL8501844A (nl) * 1985-06-27 1987-01-16 Oce Nederland B V Patents And Werkwijze voor het vergroten/verkleinen van een ditherbeeld.
GB8718100D0 (en) * 1987-07-30 1987-09-03 Crosfield Electronics Ltd Image processing

Also Published As

Publication number Publication date
ITMI941730A1 (it) 1996-02-09
EP0792552A1 (en) 1997-09-03
WO1996005692A1 (en) 1996-02-22
ITMI941730A0 (it) 1994-08-09

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970828