Patent ID: 8130313

Claim:
A method comprising: determining at least one ambient exposure parameter using an ambient illumination, the at least one ambient exposure parameter including a first sensitivity parameter of an autoexposure controller using the ambient illumination; determining at least one low-illumination parameter using a first lamp level, the at least one low-illumination parameter including a second sensitivity parameter of the autoexposure controller using the first lamp level, wherein the autoexposure controller is configured to operate according to at least one high-illumination parameter based on the at least one ambient exposure parameter and the at least one low-illumination parameter; and performing an image capture operation using a second lamp level that is brighter than the first lamp level, wherein the at least one high-illumination parameter includes a third sensitivity parameter calculated at least partially based on a ratio of an illuminance corresponding to the second lamp level to an illuminance corresponding to the first lamp level, the third sensitivity parameter determined further based on a difference of a first image frame brightness at an image sensor during the first lamp level illumination and a second image frame brightness at the image sensor during the ambient illumination.