US 12,477,233 B2
In-vehicle exposure control device and exposure control method
Tomohiro Matsumoto, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/279,513
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Apr. 23, 2021, PCT No. PCT/JP2021/016404
§ 371(c)(1), (2) Date Aug. 30, 2023,
PCT Pub. No. WO2022/224423, PCT Pub. Date Oct. 27, 2022.
Prior Publication US 2024/0305894 A1, Sep. 12, 2024
Int. Cl. H04N 23/73 (2023.01); H04N 23/611 (2023.01); H04N 23/71 (2023.01)
CPC H04N 23/73 (2023.01) [H04N 23/611 (2023.01); H04N 23/71 (2023.01)] 4 Claims
OG exemplary drawing
 
1. An in-vehicle exposure control device, comprising:
an image acquisitor to acquire a captured image of a driver of the vehicle, the captured image being output from an imaging device that captures an image of the driver in the vehicle;
a face part detector to detect one or more face parts of the driver from the captured image acquired by the image acquisitor;
a face part detection accuracy detector to detect detection accuracy of each face part detected by the face part detector;
a luminance detector to detect a first luminance, which is the luminance of at least one face part of the driver in the captured image, detected by the face part detector whose detection accuracy as detected by the face part detection accuracy detector is equal to or more than a predetermined detection accuracy;
an exposure controller to control exposure by adjusting exposure time and gain in such a way that the detected luminance of the at least one face part detected by the luminance detector is a target luminance, and
wherein the captured image is acquired and processed by a driver monitoring system (DMS) to monitor a state of the driver while the driver is driving the vehicle, and
the luminance detector detects luminance of the face of the driver as the first luminance, in a case where the face of the driver is not covered by an accessory, and detects luminance of a region of the face excluding a part of the face that is covered by an accessory as the first luminance, in a case where the part of the face of the driver is covered by the accessory.