Global Patent Index - EP 1057142 A1

EP 1057142 A1 2000-12-06 - IMAGE PROCESSING METHOD USING A BLOCK OVERLAP TRANSFORMATION PROCEDURE

Title (en)

IMAGE PROCESSING METHOD USING A BLOCK OVERLAP TRANSFORMATION PROCEDURE

Title (de)

BILDVERARBEITUNGSVERFAHREN MIT BLOCKÜBERLAPPUNGSTRANSFORMATION

Title (fr)

PROCEDE DE TRAITEMENT D'IMAGE A L'AIDE D'UNE PROCEDURE DE TRANSFORMATION PAR CHEVAUCHEMENT DE BLOC

Publication

EP 1057142 A1 (EN)

Application

EP 99906861 A

Priority

  • US 9902828 W
  • US 7566498 P

Abstract (en)

[origin: WO9942954A1] An image for digital image processing is often parsed into tiles, then the processing is applied to each tile separately. This segmentation reduces active memory and processing time compared to that needed to process the entire image as a whole. The image is parsed into a larger number of overlapping tiles. After image processing, the blocks are blended by multiplying each with a blending window chosen to be mutually constant, and the blocks are added together to form the product image free of transition artifacts. In one implementation the centers of the overlapping blocks are on a diagonal grid. In another implementation, a function of the complete window, typically the square root of each pixel of the window, is applied to the blocks prior to processing and the remainder applied after processing. This softens tile edges going into the image processing application to permit better results from edge sensitive functions, such as a Fourier transform.

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

G06T 9/00

IPC 8 full level (invention and additional information)

G06T 9/00 (2006.01)

CPC (invention and additional information)

G06T 9/007 (2013.01)

Citation (search report)

See references of WO 9942954A1

Designated contracting state (EPC)

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

EPO simple patent family

WO 9942954 A1 19990826; AU 2667799 A 19990906; EP 1057142 A1 20001206; TW 410316 B 20001101

INPADOC legal status


2003-03-12 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020903

2001-06-06 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010420

2001-01-24 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001007

2000-12-06 [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