With a glass entrance, the background can be bright while a visitor remains dark in the frame. WDR can help with large brightness differences in suitable cameras. Evaluate the setting based on the detail you want to see, not just on a uniformly looking overall image.
Leave someone standing where a visitor is normally photographed. Compare the face, clothing, and background. Determine which detail is relevant for the security question. The goal is not necessarily to show both a dark hallway and everything outside in perfect weather.
Note the model, image profile, and the available lighting settings before you start comparing. Look in the accompanying manual for which WDR options are supported. Do not make a series of changes at once; otherwise, it will not be visible later which setting causes the difference.
Evaluate a test subject who is stationary and then walks through the entrance. An improvement during stationary position may have a different effect during movement. Retrieve both fragments from the recorder and view them on the normal user equipment.
The ratio between indoor and outdoor light changes. Therefore, also check the setting when the sun is positioned differently or when indoor lighting is on. Record under what conditions the result was evaluated, so that a complaint can be investigated at a different time.
If the important detail remains insufficiently visible, discuss a different viewing angle or adjusted lighting. An setting does not need to resolve every unfavorable scene. Request a proposal with a concrete image test at the location where recognition is needed.
No. Compare the result for the scene, including movement and different lighting situations.
Not always. The viewing direction and lighting may need to be adjusted.
