Title:
METHOD FOR OBTAINING IMAGE COLOR TEMPERATURE
Document Type and Number:
WIPO Patent Application WO/2020/107511
Kind Code:
A1
Abstract:
Provided by the present invention is a method for obtaining image color temperature. The method for obtaining the image color temperature comprises: dividing a color domain space into a first region, a second region and a third region. In the first region, color temperature may be calculated according to a pixel color temperature calculation formula; and in the second region and the third region, the color temperature cannot be calculated according to the pixel color temperature calculation formula, but the image color temperature tone is affected. The positions of color coordinates of a pixel are determined; when the color coordinates are located in the first region, the pixel color temperature formula is employed to calculate the color temperature value of the pixel, and one is added to the weight of the color temperature value in a statistical table. When the color coordinates are located in the second region, a positional relationship between the color coordinates of the pixel and a reference point is used to calculate the weight value of the pixel, and the weight value is added to the weight of the maximum color temperature in the statistical table. When the pixel is located in the third region, the positional relation between the color coordinates of the pixel and the reference point is used to calculate the weight value of the pixel and the weight value is added to the weight of the minimum color temperature in the statistical table; and then, in combination with the weight, the color temperature of an image is calculated, so that the color temperature of the image may be more accurately obtained.
Inventors:
RAO YANG (CN)
PU YIYING (CN)
PU YIYING (CN)
Application Number:
PCT/CN2018/119415
Publication Date:
June 04, 2020
Filing Date:
December 05, 2018
Export Citation:
Assignee:
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECH CO LTD (CN)
International Classes:
H04N9/73; G09G5/02; H04N1/60
Foreign References:
| CN1756375A | 2006-04-05 | |||
| CN104661009A | 2015-05-27 | |||
| US20130016904A1 | 2013-01-17 | |||
| JP2008148009A | 2008-06-26 | |||
| CN1756375A | 2006-04-05 | |||
| CN104661009A | 2015-05-27 | |||
| US20130016904A1 | 2013-01-17 | |||
| JP2008148009A | 2008-06-26 |
Other References:
MASATO, ABE: "A Method to Estimate Correlated Color Temperatures of Illuminants Using a Color Video Camera", IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 28 February 1991 (1991-02-28), pages 19 - 22, XP010085065
MASATO, A. ET AL.: "A Method to Estimate Correlated Color Temperatures of Illuminants Using a Color Video Camera", IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, vol. 40, no. 1, 28 February 1991 (1991-02-28), XP000208160, DOI: 20190521165558A
MASATO, A. ET AL.: "A Method to Estimate Correlated Color Temperatures of Illuminants Using a Color Video Camera", IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, vol. 40, no. 1, 28 February 1991 (1991-02-28), XP000208160, DOI: 20190521165558A
Attorney, Agent or Firm:
COMIPS INTELLECTUAL PROPERTY OFFICE (CN)
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