US 12,260,565 B2
Image processing-based foreign substance detection method in wireless charging system and device performing method
Gwangzeen Ko, Daejeon (KR); Jung Ick Moon, Daejeon (KR); Sang-Won Kim, Daejeon (KR); Seong-Min Kim, Daejeon (KR); In Kui Cho, Daejeon (KR); Woo Jin Byun, Daejeon (KR); and Je Hoon Yun, Daejeon (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed on Mar. 18, 2022, as Appl. No. 17/698,632.
Claims priority of application No. 10-2021-0099777 (KR), filed on Jul. 29, 2021.
Prior Publication US 2023/0030303 A1, Feb. 2, 2023
Int. Cl. G06T 7/00 (2017.01); G06T 7/292 (2017.01); G06T 7/40 (2017.01); G06T 7/70 (2017.01); G06T 7/90 (2017.01); G06V 20/52 (2022.01)
CPC G06T 7/292 (2017.01) [G06T 7/40 (2013.01); G06T 7/70 (2017.01); G06T 7/90 (2017.01); G06V 20/52 (2022.01); G06T 2207/10024 (2013.01); G06V 2201/07 (2022.01)] 12 Claims
OG exemplary drawing
 
1. A method for detecting a foreign substance, the method comprising:
an operation of acquiring an image of a charging area of a wireless charging system;
an operation of detecting, based on an RGB value of a frame of the image, a foreign substance in the charging area;
an operation of discriminating a type of the foreign substance; and
an operation of performing power control of the wireless charging system according to the type of the foreign substance,
wherein the operation of detecting the foreign substance comprises:
an operation of detecting a change in the image by comparing a difference in RGB values between frames of the image with a preset threshold value; and
an operation of discriminating a factor causing the change in the image,
wherein the operation of discriminating the factor causing the change in the image comprises:
an operation of detecting, based on a feature frame acquired by filtering the frame of the image, whether there is an environmental change in the charging area; and
an operation of terminating a foreign substance detection operation when the environmental change is detected.