Patent · US Expired

Processing method for an original image

US6252931A · kind A · utility

27Cited by

7References

6Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Til Aach · Aachen, DE
Thorsten Buzug · Hamburg, DE
Martin Stahl · Kaltenkirchen, DE
Thomas Pralow · Kürten, DE
Ingo Maack · Norderstedt, DE
Ansgar Springub · Hamburg, DE

Key dates

Filing date	Oct 22, 1999
Grant date	Jun 26, 2001
Priority date	—
Expiry date	Oct 22, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG06T5/20
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The invention relates to an image processing method in which an original image is first decomposed into a series of detail images, with each of which there is associated a respective spatial frequency range, low contrasts being enhanced before assembly of a final image from the images which are produced by the decomposition and are subsequently modified. The modification of the detail images is performed in dependence on the relevant image value as well as in dependence on the mean image value and/or the variation of the image values in a window around the relevant pixel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.