Title:
METHOD AND APPARATUS FOR PROCESSING DYNAMIC RANGE OF IMAGE
Document Type and Number:
WIPO Patent Application WO/2021/223542
Kind Code:
A1
Abstract:
Provided are a method and apparatus for processing a dynamic range of an image. The method comprises: acquiring a first coordinate value of a first interpolation point related to a first cubic spline curve and a first coordinate value of a third interpolation point related to the first cubic spline curve; and according to histogram information of a first brightness interval of an image to be processed, determining a first coordinate value of a second interpolation point related to the first cubic spline curve, wherein the first brightness interval is an interval between the first coordinate value of the first interpolation point and the first coordinate value of the third interpolation point; the first coordinate value of the first interpolation point, the first coordinate value of the second interpolation point and the first coordinate value of the third interpolation point are used for determining a function of the first cubic spline curve; and the function of the first cubic spline curve is used for mapping a brightness value of a pixel, which brightness value is located within the first brightness interval, in said image into a first target brightness value, so as to correct a dynamic range of said image. By means of the present application, the display effect of an image is improved.
Inventors:
WANG YICHUAN (CN)
YU QUANHE (CN)
CHEN HU (CN)
XU WEIWEI (CN)
ELENA ALEXANDROVNA ALSHINA (CN)
YU QUANHE (CN)
CHEN HU (CN)
XU WEIWEI (CN)
ELENA ALEXANDROVNA ALSHINA (CN)
Application Number:
PCT/CN2021/083616
Publication Date:
November 11, 2021
Filing Date:
March 29, 2021
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
G06T3/40
Foreign References:
| CN112215760A | 2021-01-12 | |||
| JP2010074222A | 2010-04-02 | |||
| CN109785239A | 2019-05-21 | |||
| CN103281537A | 2013-09-04 | |||
| CN102231264A | 2011-11-02 | |||
| CN202010383489A | 2020-05-08 |
Other References:
See also references of EP 4138029A4
Attorney, Agent or Firm:
BEIJING RUN ZEHENG INTELLECTUAL PROPERTY LAW FIRM (CN)
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