US 12,283,125 B2
Method for capturing fingerprint image, apparatus for capturing fingerprint image, and electronic device
Hongsong Nie, Shenzhen (CN); and Ke Zhang, Shenzhen (CN)
Assigned to SHENZHEN GOODIX TECHNOLOGY CO., LTD., (CN)
Filed by SHENZHEN GOODIX TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed on Nov. 3, 2023, as Appl. No. 18/501,163.
Application 18/501,163 is a continuation of application No. PCT/CN2021/099016, filed on Jun. 8, 2021.
Prior Publication US 2024/0078834 A1, Mar. 7, 2024
Int. Cl. G06V 40/13 (2022.01); G06V 10/60 (2022.01); G06V 40/12 (2022.01); G09G 3/32 (2016.01); H04N 23/73 (2023.01)
CPC G06V 40/13 (2022.01) [G06V 10/60 (2022.01); G06V 40/1359 (2022.01); G09G 3/32 (2013.01); H04N 23/73 (2023.01); G09G 2354/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for capturing a fingerprint image, comprising:
controlling a fingerprint sensor to capture at least one frame of image based on each candidate exposure time among N candidate exposure times respectively, the N candidate exposure times comprising a first exposure time greater than a preset exposure time, a second exposure time shorter than the preset exposure time, and the preset exposure time, wherein a difference between the first exposure time and the preset exposure time and a difference between the preset exposure time and the second exposure time are each a positive integer multiple of a preset step size and less than the preset exposure time, and N is a positive integer greater than or equal to 3;
determining N values of a feature parameter corresponding to the N candidate exposure times according to the at least one frame of image captured in the each exposure time, wherein the feature parameter is used to indicate a degree of influence of a refresh period of a display screen on the fingerprint image captured by the fingerprint sensor;
determining a candidate exposure time corresponding to a first value indicating a smallest degree of influence among the N values as a target exposure time; and
controlling the fingerprint sensor to capture the fingerprint image based on the target exposure time.