US 12,141,949 B2
Vehicle-mounted camera apparatus and image distortion correction method
Satoshi Nakayama, Kanagawa (JP); and Yoshikazu Ohnami, Kanagawa (JP)
Assigned to SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
Appl. No. 17/593,114
Filed by SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Mar. 11, 2020, PCT No. PCT/JP2020/010611
§ 371(c)(1), (2) Date Sep. 9, 2021,
PCT Pub. No. WO2020/195851, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-058162 (JP), filed on Mar. 26, 2019.
Prior Publication US 2022/0148138 A1, May 12, 2022
Int. Cl. H04N 23/55 (2023.01); B60R 11/04 (2006.01); G06T 5/80 (2024.01); H04N 23/51 (2023.01); H04N 23/80 (2023.01)
CPC G06T 5/80 (2024.01) [B60R 11/04 (2013.01); H04N 23/51 (2023.01); H04N 23/55 (2023.01); H04N 23/815 (2023.01)] 9 Claims
OG exemplary drawing
 
1. A vehicle-mounted camera apparatus, comprising:
a lens configured to image light, wherein the lens is a wide-angle lens;
an image capture device unit configured to convert the light imaged by the lens into an electrical signal to generate a captured image;
a light shielding unit on an incident surface side of the lens, wherein the light shielding unit is configured to shield a light ray corresponding to a part of an image capture region of the image capture device unit; and
an image processing unit configured to:
generate a first output image from the captured image, wherein the first output image has a first resolution;
generate a second output image having a second resolution, wherein
the second resolution is smaller than the first resolution, and
the second output image is generated from a first region where the light ray is shielded by the light shielding unit, wherein the first region is outside a second region of the second output image;
acquire first temperature data corresponding to a first distortion correction;
calculate an image height characteristics of the lens based on a difference between the first temperature data and second temperature data that is equal to or higher than a specific value, wherein
the second temperature data corresponds to a second distortion correction, and
the second distortion correction is previous to the first distortion correction; and
correct distortion of the captured image based on the calculated image height characteristics of the lens and a design value of the image height characteristics, wherein
the distortion of the captured image is corrected based on a difference between a first image height characteristics and a second image height characteristics that is equal to or higher than a threshold value, and
the first image height characteristics corresponds to a time of the first distortion correction and the second image height characteristics corresponds to a time of the second distortion correction.