System and method for improving signal to noise ratio in object tracking under poor light conditions

An imaging system including:

• one or more cameras for capturing images of a scene;
• one or more light sources configured to selectively illuminate the scene during image capture by the one or more cameras;
• a processor configured to process at least a subset of the captured images to determine one or more tracking parameters of the scene and to determine one or more illumination characteristics of the images;
• and
• a controller configured to send a control signal to the one or more light sources to control the drive current amplitude and pulse time of the one or more light sources, wherein the controller selectively adjusts the drive current amplitude and pulse time based on the determined illumination characteristics of a previous captured image or images;
• wherein the controller is configured to control the drive current pulse time of the one or more light sources to match an image sensor exposure time of the one or more cameras;
• and
• wherein the drive current amplitude is determined from the light source drive current pulse time based on a predefined relationship between the light source drive current amplitude to the light source drive current pulse time.