	US 11,989,885 B2
	Speckle detection method and electronic device
Zhizhi Guo, Shenzhen (CN); Henghui Lu, Beijing (CN); and Wenmei Gao, Beijing (CN)
Assigned to HONOR DEVICE CO., LTD., Shenzhen (CN)
Appl. No. 17/260,855
Filed by HONOR DEVICE CO., LTD., Shenzhen (CN)
PCT Filed Sep. 18, 2018, PCT No. PCT/CN2018/106236 § 371(c)(1), (2) Date Jan. 15, 2021, PCT Pub. No. WO2020/015148, PCT Pub. Date Jan. 23, 2020.
Claims priority of application No. 201810776283.7 (CN), filed on Jul. 16, 2018.
Prior Publication US 2021/0264597 A1, Aug. 26, 2021
Int. Cl. G06T 7/11 (2017.01); G06F 18/241 (2023.01); G06T 7/00 (2017.01); G06T 7/514 (2017.01); G06V 10/56 (2022.01); G06V 40/10 (2022.01); G06V 40/16 (2022.01)

CPC G06T 7/11 (2017.01) [G06F 18/241 (2023.01); G06T 7/0012 (2013.01); G06T 7/514 (2017.01); G06V 10/56 (2022.01); G06V 40/10 (2022.01); G06V 40/171 (2022.01); G06T 2207/10024 (2013.01); G06T 2207/30088 (2013.01); G06V 2201/03 (2022.01)]

17 Claims

1. A speckle detection method, comprises:

obtaining a to-be-detected image;

converting the to-be-detected image into Lab color space to obtain a Lab image;

extracting a speckle feature from the Lab image to obtain a speckle feature image, comprising separately extracting detail feature components of a channel L, a channel a, and a channel b in the Lab image to obtain the speckle feature image, wherein the speckle feature image comprises a skin speckle feature and a subcutaneous speckle feature; and

determining a skin speckle and a subcutaneous speckle in the speckle feature image, comprising

determining one or more speckle regions in the speckle feature image,

for each of the one or more speckle regions, determining a channel b average value of pixel points of the respective speckle region, determining the respective speckle region whose channel b average value is greater than a first threshold as the skin speckle, and determining the respective speckle region whose channel b average value is less than or equal to the first threshold as the subcutaneous speckle.