Title:
IMAGE PROCESSING METHOD AND COMPUTER SOFTWARE FOR IMAGE PROCESSING
Document Type and Number:
WIPO Patent Application WO2006018658
Kind Code:
A3
Abstract:
The invention provides a method of image correction processing which comprises altering area image intensity values of an image according to an dynamic range compression image transform. The output image intensity of an area is altered, compared to the input image intensity, according to an area amplification coefficient. The amplification coefficient of an area is varied in dependence upon the amplification coefficient of at least one other neighbouring area. The invention preserves contrast in images that have been processed in order to compress dynamic range.
Inventors:
CHESNOKOV VYACHESLAV (GB)
Application Number:
PCT/GB2005/003261
Publication Date:
June 01, 2006
Filing Date:
August 19, 2005
Export Citation:
Assignee:
APICAL LTD (GB)
CHESNOKOV VYACHESLAV (GB)
CHESNOKOV VYACHESLAV (GB)
International Classes:
G06T5/20; G06T5/40
Domestic Patent References:
| WO2002089060A2 | 2002-11-07 | |||
| WO2004051569A1 | 2004-06-17 |
Other References:
CHIU K. ET AL.: "Spatially Nonuniform Scaling Functions for High Contrast Images", PROC. OF GRAPHICS INTERFACE 1993, May 1993 (1993-05-01), pages 245 - 253, XP002368439
SHAKED D. AND KESHET R.: "Robust Recursive Envelope Operators for Fast Retinex", HP LABORATORIES TECHNICAL REPORT HPL-2002-74R1, 18 March 2004 (2004-03-18), Technion City, Haifa, Israel, XP002368440, Retrieved from the Internet [retrieved on 20060215]
OGATA, M. ET AL.: "Dynamic Range Compression Based on Illumination Compensation", IEEE TRANS ON CONSUMER ELECTRONICS, vol. 47, no. 3, August 2001 (2001-08-01), pages 548 - 558, XP002368441
FATTAL R., LISCHINSKI D. AND WERMAN M.: "Gradient Domain High Dynamic Range Compression", ACM SIGGRAPH 2002, 2002, pages 249 - 256, XP002368442
TAO L. AND ASARI V.: "An Integrated Neighborhood Dependent Approach for Nonlinear Enhancement of Color Images", PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON INFORMATION TECHNOLOGY: CODING AND COMPUTING (ITCC'04), 5 April 2004 (2004-04-05), Las vegas, Nevada, USA, XP002368443
SHAKED D. AND KESHET R.: "Robust Recursive Envelope Operators for Fast Retinex", HP LABORATORIES TECHNICAL REPORT HPL-2002-74R1, 18 March 2004 (2004-03-18), Technion City, Haifa, Israel, XP002368440, Retrieved from the Internet
OGATA, M. ET AL.: "Dynamic Range Compression Based on Illumination Compensation", IEEE TRANS ON CONSUMER ELECTRONICS, vol. 47, no. 3, August 2001 (2001-08-01), pages 548 - 558, XP002368441
FATTAL R., LISCHINSKI D. AND WERMAN M.: "Gradient Domain High Dynamic Range Compression", ACM SIGGRAPH 2002, 2002, pages 249 - 256, XP002368442
TAO L. AND ASARI V.: "An Integrated Neighborhood Dependent Approach for Nonlinear Enhancement of Color Images", PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON INFORMATION TECHNOLOGY: CODING AND COMPUTING (ITCC'04), 5 April 2004 (2004-04-05), Las vegas, Nevada, USA, XP002368443
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