ACTi E31A User Manual download pdf (Page 74)

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Firmware User’s Manual V6.08.30

Exposure / White Balance

The section Exposure / White Balance allows the user to configure

Exposure (shutter, iris and gain control) and White Balance settings. In most cases, the default

settings are sufficient and no adjustment is needed. Some options will only appear under certain

Exposure / White balance modes. Each mode is described in detail below.

IR Exposure Compensation – Enabled

IR Exposure Compensation is available on all cameras with IR lLEDs. This feature

automatically balances the IR exposure to eliminate over-exposed images cause by too much IR

on the subject. When enabled, the AE reference target is automatically adjusted to control the

sensor’s shutter speed and gain to compensate IR effect.

Exposure Mode - Auto

In Auto Exposure Mode, you control the image brightness by configuring the AE Reference

Target and Slowest Auto Shutter.

AE Reference Target (Auto Exposure reference target) can be considered as the “Target

Brightness on Sensor”. The camera will use several internal parameters to achieve best quality

with reference to this. The higher this value, the brighter the overall scene, however, there

may be more noise at night in such case. The range of AE Reference Target is 1~255.

The camera will automatically control shutter speed, auto iris (if available) and signal gain to

achieve the target level set by the user. If the auto iris does not exist or is already opened to a

maximum size, and the image is still darker than the user defined target, it will further slow down

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ACTi E31A User Manual Page 74