Patent ID: 11941897
Assignee: FOTONATION LIMITED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 5:
6. The vehicle OMS according to claim 1 wherein:
said image acquisition device comprises a lens assembly having a varying transmissivity across a field of view of the image sensor; and
said at least one infra-red, IR, light source is configured to illuminate at least one occupant of the vehicle with varying illumination across the field of view of the image sensor;
said OMS further comprising:

an image processing pipeline configured to obtain and pre-process an image acquired from said image sensor in accordance with a lens shading map and a cabin illumination map in
order to compensate for both said varying transmissivity and said varying illumination in order to provide a more uniformly illuminated image to a controller for further analysis.