Global Patent Index - EP 1238370 A1

EP 1238370 A1 2002-09-11 - SYSTEM AND METHOD FOR IMAGE COMPRESSION

Title (en)

SYSTEM AND METHOD FOR IMAGE COMPRESSION

Title (de)

SYSTEM UND VERFAHREN ZUR BILDKODIERUNG

Title (fr)

SYSTEME ET PROCEDE DESTINE A LA COMPRESSION D'IMAGE

Publication

EP 1238370 A1 (EN)

Application

EP 00974209 A

Priority

  • CA 0001307 W
  • US 16466699 P

Abstract (en)

[origin: WO0135340A1] A system and method for reducing the volume of data necessary to represent an image by utilizing tiling and masking techniques is disclosed. Initially, an image described by raster content having an original number of bits per pixel is provided. The image is divided into tiles such that each of the tiles represents a portion of the image. Then, for each of the tiles, the following steps are performed: (a) the colors in the tile are identified; (b) the required number of masks are compared to a threshold number of masks to determine if data reduction by using masks is worthwhile; (c) if the required number of masks is less than the threshold number of masks, a representation of the tile is generated using fills and/or masks; and (d) if the required number of masks is greater than or equal to the maximum number of masks, a representation for the tile using the original format and number of bits per pixel or a smaller index is generated.

IPC 1-7 (main, further and additional classification)

G06T 9/00

IPC 8 full level (invention and additional information)

G06T 1/00 (2006.01); G06T 9/00 (2006.01); H04N 1/41 (2006.01)

CPC (invention and additional information)

G06T 9/005 (2013.01)

Citation (search report)

See references of WO 0135340A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

WO 0135340 A1 20010517; AU 1261201 A 20010606; EP 1238370 A1 20020911; JP 2003514416 A 20030415

INPADOC legal status


2005-02-23 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20040818

2003-03-05 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030120

2002-09-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020610

2002-09-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-09-11 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI