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Exposure Settings

Open the Exposure Settings dialog to adjust the exposure settings of the camera and to optimize it for the current lighting condition. The MOBOTIX camera is equipped with several automatic features so that the best possible images can be created under all weather and lighting conditions. Normally, only extreme conditions call for manual modifications of the exposure settings.

Notes:


Description of Parameters

Automatic Contrast The automatic contrast should always be activated in order to create high-contrast images under all lighting conditions.
Brightness

Changing the Brightness parameter will adjust the entire image area.

Notes:

  • Configure the Exposure Windows first (see below). This is usually sufficient to achieve good image exposure control.
  • If setting the exposure windows alone does not produce satisfying results, you may want to use the Brightness parameter for fine tuning.
  • Selecting high values for this parameter that are too high may lead to overexposure of bright image areas.
Backlight Correction

This parameter also is used for adjusting the brightness of an image. However, it only affects the darker portions of an image.

Notes:

  • Configure the Exposure Windows first (see below). This is usually sufficient to achieve good image exposure control.
  • If setting the exposure windows alone does not produce satisfying results, you may want to use the Backlight Correction parameter for fine tuning.
Night Improvement

This feature improves the contrast of dark images.

Note: Activating this parameter may result in an increase of image noise.
Lens F-Number Select the proper F-Stop number of the lens to obtain correct values for illumination.
Exposure Window

Exposure windows are defined image areas that are used for exposure and color adjustment. To facilitate exposure window positioning, you can select from a number of pre-defined exposure windows.

Notes:

  • If your camera is a dual lens model, you can define different exposure windows for each lens.
  • You may also use the exposure windows to perform the automatic White Balance adjustment.

Predefined exposure windows:

fulltext Uses the complete image area for exposure control.
Quarter An exposure window at the image center that covers a quarter of the viewable image area.
center One exposure window at the image center.
Spot One small exposure window at the image center.
top One horizontal exposure window at the top of the image.
Middle One horizontal exposure window at the image center.
bottom One horizontal exposure window at the bottom of the image.
right One vertical exposure window at the right border of the image.
Vertical One vertical exposure window at the image center.
Left One vertical exposure window at the left border of the image.
Right & Left Two vertical exposure windows at the left and right borders of the image.
Extra Select this value if you would like to define customized exposure windows in the configuration file.
Exposure Weighting

Using this parameter, you can define how much the exposure windows are to be considered for exposure control—relative to the remainder of the image.
Values: Total .. 0% .. 100%

The factory default setting is 100% which means that only the exposure windows are used for exposure control.

White Bal. Weight

Using this parameter, you can define how much the exposure windows are to be considered for white balancing—relative to the remainder of the image.
Values: Total .. 0% .. 100%

The factory default setting is Total which means that the entire image is used for white balance.

Average Brightness

This parameter of exposure control (default is 40%) specifies the average brightness of the image pixels considered for exposure control (→ exposure windows) that the camera tries to reach; it is thus the target value for the finished image's brightness. In order to reach this value, the camera first tries to change the exposure time within the limits set by the minimum and maximum exposure time and adjusts the hardware amplification within the internally defined limits.

Minimum Average Brightness

If the brightness continues to decrease, the camera extends the exposure time and increases the hardware amplification to maintain the specified average brightness, until the maximum exposure time has been reached.

If it still gets darker, the image brightness drops below the value of the average brightness and approaches the value of the minimum average brightness. If the image brightness drops below this value, the camera will activate the software amplification to maintain the minimum average brightness for as longs as possible.

When setting this parameter, the following rules apply:

  • A lower value produces images with higher quality, which may become darker and thus constitute a more natural reflection of reality. The default value of 20% results in a largely lifelike behavior.
  • A higher value increases the brightness of the images, but it can produce images with lower quality due to increased image noise.
Show Field

on: Shows the defined exposure window(s) as green box(es) within the image.
The Histogram option shows additional parameters of specific image processing features in the image.

Exposure Program

Use this parameter to influence the balance between an exposure time that is as short as possible and hardware amplification that is as low as possible. The objective is to reach a fair compromise between clear images of moving objects (short exposure time, high amplification) and as little image noise as possible (long exposure time, low amplification).

When using the camera in a web application, a positive value would create images with little amplification (i.e. little image noise); moving objects would be displayed in a blurred manner. On the other hand, a security application would require a negative value to show moving objects as clearly as possible, even if this would mean higher image noise.

Max. Exposure Time Set the maximum exposure time in seconds.
Min. Exposure Time Set the minimum exposure time in seconds.
Frequency of Power Supply This parameter sets the camera to the power supply frequency of the respective country to prevent interference.
The factory default setting for Europe is 50 Hz. For Canada, the U.S.A. and Japan, set the power supply frequency to 60 Hz.
Note: The camera displays the current exposure settings of the image sensors at the end of the dialog.

Konfiguration sichern

Klicken Sie auf Setzen, um die Einstellungen zu aktivieren und bis zum nächsten Neustart der Kamera zu sichern.

Beenden Sie den Dialog durch Klick auf Schließen. Hierbei wird geprüft, ob Änderungen der Gesamtkonfiguration vorliegen. Ist dies der Fall, werden Sie gefragt, ob die Gesamtkonfiguration dauerhaft gesichert werden soll.

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