Understanding Wide Dynamic Range - Siemens CCDA1415-DN Instruction Manual

9.4

Understanding Wide Dynamic Range

Siemens Building Technologies
Fire & Security Products
Wide Dynamic Range (WDR) is a feature that allows clear viewing of both bright
and low light areas in a scene. Use this feature if you need to view both indoor and
outdoor lighting conditions simultaneously.
For example, a dome is installed in the loading dock area of a building. When the
door to the loading dock area is closed, the light level remains constant and the
interior can be viewed clearly without iris adjustments.
Fig. 20 Example scene of a loading dock with the door closed
When the door is open, additional light from outside enters the room and distortion
occurs. Without WDR, you could adjust the iris of the camera to compensate for
the lighting change, however you cannot clearly see both activities inside and
outside of the loading dock area simultaneously.
For example, if you close the iris, the outside scene will improve, but the interior
scene will become too dark to view clearly. In Fig. 21, the car near the loading dock
door can be seen clearly, but the interior of the room appears too dark
Fig. 21 Example scene of loading dock with door open and iris close adjustment
If you want to view the interior scene, open the iris to make the dark scene appear
brighter. However, this causes the outdoor scene to appear too bright.
In Fig. 22, it is difficult to see the car near the loading dock door.
Fig. 22 Example scene with loading dock door open and iris open adjustment
Configuring Camera Features
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