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.
The automatic contrast should always be activated in order to create high-contrast images under all lighting conditions.
Changing the Brightness parameter will adjust the entire image area.
This parameter also is used for adjusting the brightness of an image. However, it only affects the darker portions of an image.
Full Image Area: The full image of the sensor (i.e. the 1x Zoom, no lens correction on cameras which have this feature) is used to determine the proper exposure. The following parameters for exposure windows, exposure weighting and white balance weighting are used to set the appearance of the image.
Visible Image Area: This mode optimizes exposure control for the visible image section. Other parameters are not used, i.e. the settings of the exposure windows, exposure weighting and white balance weighting parameters are ignored.
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.
Predefined exposure windows:
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.
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.
The factory default setting is Total which means that the entire image is used for white balance.
on: Shows the defined exposure window(s) as green box(es) within the image.
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:
This feature improves the contrast of dark images.
These parameters 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 by artificial light.
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. If the camera is used with artificial illumination (rather than daylight), you can also use the setting Ignore.
Click on the Set button to activate your settings and to save them until the next reboot of the camera.
Click on the Close button to close the dialog. While closing the dialog, the system checks the entire configuration for changes. If changes are detected, you will be asked if you would like to store the entire configuration permanently.