Auto Exposure vs. Auto Gain
In photographic terms, exposure is the amount of time that the sensor is exposed to the light. Auto-exposure is often used in outdoor applications where lighting conditions vary widely. When set to auto-exposure, the Prosilica camera will automatically adapt the exposure depending on the current light conditions.
However, when viewing a moving object, it is necessary to limit the exposure time in order to minimize blur caused by motion. If this exposure limit does not provide a bright enough image then gain can be used. Gain is an amplification of the image signal, similar to the contrast control on a television set. This function is very useful when a short exposure is required (say, to reduce motion blur) because gain can be increased to optimize the image signal. However, gain amplifies not only the signal, but also image noise.

Prosilica provides very flexible auto-iris, auto-exposure and auto-gain features that work together seamlessly to optimise image performance in variable light environments.

The camera Gain function has three modes: Auto, Manual and AutoOnce modes. Each mode can be controlled by various parameters.
To view the full list of Auto Gain parameters, please go to:

http://www.prosilica.com/support/gige/ge_controls.html#Gain.

Firmware upgrade
In order to take full advantage of the Auto-Gain function, existing users of Prosilica GigE cameras will need to update their firmware to the latest version (1.34)
released on 8th January 2009. To do so,please go to:

http://www.prosilica.com/support/gige/ge_download.html

Direkt-Link zur Prosilica Kamera Übersicht:
http://www.rauscher.de/Produkte/Kameras/Prosilica-GigE-Vision-Kameras/

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