The Video Cameras node on the System tab of the Resources pane enables you to manage the identification and configuration settings for each digital video camera connected to your Vicon system. You can also remove or reorder video cameras.
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Video Cameras node context menu
You can select the following commands from the context menu displayed when you right-click on the Video Cameras node:
Display the Reorder Devices dialog box in which you can change the order in which digital video cameras are displayed in the System resources tree.
Reboot Video Cameras
Stop and restart all of the Vicon Video cameras in the Vicon system.
Remove Video Cameras (Disconnected or Missing)
Removes disconnected video cameras
Align Shutters (Basler)
Aligns the shutters with the rest of the Vicon system. Use after any change to the camera settings that affects shutter alignment.
Video Camera properties
You can configure settings in the following sections of the Properties pane for video cameras. The available properties depend on the type of video camera included in your Vicon system, so you may not see all of the properties described.
The settings for some properties may differ depending on whether you are using video calibration setup mode or live capture mode. For these properties, changes you make in video calibration setup mode do not affect the settings in live capture mode and vice versa. In the following lists, these properties are indicated by an asterisk (*).
A name that you supply, which enables you to identify the camera in Vicon Nexus.
The unique identification number Vicon assigns to the digital video camera. The top-level entry for all cameras takes no value.
Whether or not the digital video camera is currently enabled for use.
Whether the video camera captures in color.
The length of time that the camera shutter is open during an image capture. The maximum shutter speed cannot exceed the value specified in Requested Frame Rate. For example, if the frame rate is set to 50 fps, an image is taken every 20 milliseconds, the shutter speed cannot exceed 19 ms.
This value controls the amount of color in the image. Decreasing the value towards 0 results in a grayscale image with no color; increasing the value over 1 results in supersaturated colors.
The digital amplification of the pixel value.
The digital amplification of the pixel value.
The brightness of pixels.
The gamma setting of the camera.
A linear intensity offset that is applied to each component of the video image. Where Video Gain is a multiplication, Brightness Offset adds a value to the component.
The drive letter (e.g., C:\ or H:) of the computer from which video data from the digital video camera is to be captured. Because the data rates can be very high, you are advised to capture digital video data to a different drive than the Vicon optical data.
Pixel Aspect Ratio
The height vs. width ratio of pixels. The default varies according to camera type: Vicon Nexus detects whether the camera is likely to produce non-square pixels and adjusts the ratio accordingly.
Frame Rate section
The source of the synchronization signal. Select the Vicon connectivity unit to which the video camera is connected from this drop-down list. If None is selected, no synchronization occurs.
Trigger Offset (ms)*
The sync pulse delay, in millisecond (ms). Default: 0
Requested Frame Rate*
The rate, in frames per second (fps), for the video camera to control the camera shutter speed, data rate, and area of interest to achieve the desired frequency.
Incoming Frame Rate
The actual system frame rate at which the camera is sending video frames to Nexus. The Incoming Frame Rate may differ from the Requested Frame Rate and the rate reported next to the camera node in the System tree due to system limits and fluctuations.
Centroid Fitting section
This setting differentiates between markers and ambient light. To enable the cameras to distinguish between light that comes from markers and light that does not, a threshold is applied. Anything above this threshold is deemed to be a marker, anything below is deemed to be ambient light. A value in the region of 0.2 to 0.5 is usually appropriate.
Destination IP Address
The IP address of the network adapter to which data is to be sent. For video cameras, the Destination IP address must not be shared with another camera.
Sub Sample Ratio*
Ratio of sub-sampled frames to requested frame rate, for example, for a Requested Frame Rate of 240Hz, a sub sample ratio of 2:1 gives a sub-sampled frame rate of 120Hz.
Removes the selected camera from the current calibration.
Focal Length (mm)
The focal length (in millimeters) of the camera lens.
When clicked, reboots the selected video camera
You can also remove or reorder video cameras (see Video Cameras node context menu).