US 11,915,454 B2
Color palette for capturing person's image for determination of facial skin color, and method and apparatus using same
Hyeon-Jeong Suk, Daejeon (KR); and Yuchun Yan, Daejeon (KR)
Assigned to KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Appl. No. 17/595,269
Filed by KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
PCT Filed Sep. 26, 2019, PCT No. PCT/KR2019/012485
§ 371(c)(1), (2) Date Nov. 12, 2021,
PCT Pub. No. WO2020/230959, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 10-2019-0056782 (KR), filed on May 15, 2019.
Prior Publication US 2022/0215587 A1, Jul. 7, 2022
Int. Cl. G06T 7/90 (2017.01)
CPC G06T 7/90 (2017.01) [G06T 2207/10024 (2013.01); G06T 2207/30201 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An operating method of an electronic device, comprising:
executing an application;
capturing a facial image comprising a color palette;
extracting a skin area and multiple reference areas from the facial image based on the color palette;
detecting first colorimetric information for the skin area and second colorimetric information for the reference areas; and
determining a skin color of the skin area by comparing the first colorimetric information and the second colorimetric information,
wherein the color palette comprises:
a central section which is provided to define the skin area and is configured to be an empty space or a transparent area, and
multiple color sections provided to define the reference areas and arranged to surround the central section, colors in the color sections being arranged according to a rule based on at least one color characteristic indicating brightness pattern and/or tone pattern of the colors in the color sections,
wherein the determining of the skin color comprises:
determining whether colors in the reference areas of the facial image are arranged identically with the rule based on a comparison between the second colorimetric information for the reference areas and the at least one color characteristic; and either
determining the skin color of the skin area by comparing the first colorimetric information and the second colorimetric information if the colors in the reference areas are arranged identically with the rule; or
requesting a re-capturing of the facial image if the colors in the reference areas are arranged differently from the rule.