	US 12,236,636 B2
	Distance measurement method, distance measurement apparatus, and computer-program product
Jingru Wang, Beijing (CN); Xiaojun Tang, Beijing (CN); and Guangli Wang, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/761,183
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed May 31, 2021, PCT No. PCT/CN2021/097204 § 371(c)(1), (2) Date Mar. 16, 2022, PCT Pub. No. WO2022/252007, PCT Pub. Date Dec. 8, 2022.
Prior Publication US 2022/0383544 A1, Dec. 1, 2022
Int. Cl. G06T 7/73 (2017.01); G06T 7/564 (2017.01); G06T 7/62 (2017.01)

CPC G06T 7/74 (2017.01) [G06T 7/564 (2017.01); G06T 7/62 (2017.01); G06T 2207/10024 (2013.01); G06T 2207/20224 (2013.01); G06T 2207/30201 (2013.01)]

18 Claims

1. A distance measurement method, comprising:

obtaining an image of a target device, the image of the target device comprising a target object of a first color and a background object of a second color, the first color being different from the second color;

processing the image of the target device to obtain a processed image, the processed image comprising a processed target object of a third color and a processed background object of a fourth color;

detecting a contour of the processed target object of the third color;

calculating an area encircled by the contour; and

calculating a distance between a camera and the target device upon determination of the area encircled by the contour;

wherein processing the image of the target device comprises:

obtaining color component values in a color space of a pixel data of the image of the target device; and

converting the color component values into converted color component values based on a first conversion algorithm;

wherein the color component values of the pixel data comprise a first color component value and a second color component value;

wherein the first conversion algorithm comprises:

subtracting the second color component value of the pixel data from the first color component value of the pixel data to obtain a subtracted value; and

assigning an absolute value of the subtracted value as a color component value for each color component of the pixel data, thereby obtaining the converted color component values of the processed image.