US 12,278,942 B2
Calibration method and apparatus for binocular camera, image correction method and apparatus for binocular camera, storage medium, terminal and intelligent device
Huimin Zhang, Shanghai (CN)
Assigned to SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD., Shanghai (CN)
Appl. No. 18/021,982
Filed by SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD., Shanghai (CN)
PCT Filed Aug. 19, 2021, PCT No. PCT/CN2021/113462
§ 371(c)(1), (2) Date Feb. 17, 2023,
PCT Pub. No. WO2022/037633, PCT Pub. Date Feb. 24, 2022.
Claims priority of application No. 202010838111.5 (CN), filed on Aug. 19, 2020.
Prior Publication US 2023/0370577 A1, Nov. 16, 2023
Int. Cl. H04N 13/246 (2018.01); G06T 7/50 (2017.01); G06T 7/80 (2017.01); H04N 13/239 (2018.01); H04N 13/296 (2018.01)
CPC H04N 13/246 (2018.05) [G06T 7/50 (2017.01); G06T 7/85 (2017.01); H04N 13/239 (2018.05); H04N 13/296 (2018.05); G06T 2207/10148 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for calibrating a binocular camera, comprising:
acquiring a first focal length group, wherein the first focal length group comprises a plurality of focal lengths for calibrating, and each of the focal lengths represents a focal length of a main camera in the binocular camera;
performing calibration operations on the binocular camera based on the first focal length group, wherein the focal length of the main camera in the binocular camera for shooting a calibration target plate is adjusted during each of the calibration operations, the adjusted focal length is determined based on the first focal length group, and a relative position between the binocular camera and the calibration target plate remains unchanged during the calibration operations; and
determining a relationship between calibration parameters and the focal lengths based on the calibration operations;
wherein the acquiring a first focal length group comprises:
acquiring a relationship between physical distances and focal lengths; and
selecting, based on the relationship between physical distances and focal lengths, a plurality of focal lengths related to physical distances for calibrating, to obtain the first focal length group;
wherein the acquiring a relationship between physical distances and focal lengths comprises:
acquiring a sample set, wherein the sample set comprises a plurality of binocular cameras; and
measuring a focal length of each of the binocular cameras in the sample set at each of the physical distances, to obtain the relationship between physical distances and focal lengths.