公开(公告)号：US20230049522A1

公开(公告)日：2023-02-16

申请号：US17797205

申请日：2021-01-28

Applicant: Perkins Engines Company Limited

Inventor： Michael FLATMAN ,  Samuel Alec ROBERTS ,  Thomas Henry ABEL ,  Raymond Alan WISE ,  Peter Joseph PETRANY

IPC: H04N5/235 ,  H04N5/225 ,  B60Q1/14 ,  B60Q1/30 ,  B60R1/26

Abstract: Changes in ambient light intensity are detected by processing image data from an image capture device to determine, iteratively, a signal-to-noise ratio of the image data. The signal-to-noise ratio is a ratio of average to variance of pixel values for some of the pixels forming the image. A control outputis generated, based on the signal-to-noise ratio, that is responsive to changes in ambient light intensity. The control output is used control a light source of a vehicle.