Manual Axis IP-Surveillance system (page 29 of 50) (English)

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> Avoid direct sunlight

Direct sunlight should always be avoided. Direct sunlight will “blind” the camera and can reduce the

performance of the image sensor chip. If possible, position the camera with the sun shining from

behind the camera.

> Bright areas in the images should be avoided as they might become overexposed (bright white) and

objects can then appear too dark. This problem typically occurs when attempting to capture an object

in front of a window. To solve this problem, simply reposition the camera or draw the curtains and

close blinds if possible.

> Contrast

In outdoor environments, viewing too much of the sky results in too much contrast. The camera will

adjust in order to achieve a proper light level for the sky. Consequently, the object/landscape of

interest will appear too dark. One way to solve this problem is to mount the camera high above the

ground, using a pole if needed. In advanced network cameras, users may be able to set which part of

an image should be more correctly exposed.

> Lenses

An auto iris lens should always be used for outdoor applications. An auto iris lens automatically

adjusts the amount of light that reaches the image sensor. This optimizes the image quality and

protects the image sensor from being damaged by strong sunlight.

Figure 3.e. Avoid very bright areas in an image

by changing the camera position.

Figure 3.f. Advanced cameras include

the feature to compensate for backlight.

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Axis IP-Surveillance system Manual

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