When taking stills from a IP CCTV camera (Axis P1357-E) in low light (night) conditions of a moving vehicle, I am getting circular dark patches where the vehicle headlights have lit up the road.
As demonstrated in the photo below (look at the road to the left of the van)
What causes these spots to appear and is there anything I change in the camera settings that will remove them?
There is constant IR illumination of road that is shown from the same position as the camera. The camera has a 1/3.2" progressive scan CMOS sensor. The image is stream is MJPEG and the still is a JPEG.
I can change:
- Exposure value [0..100]
- Exposure control
- Shutter speed
Below is three consecutive frames taken from the camera