User`s manual

AW00049313000 Acquisition Control
Basler runner 75
The Height parameter determines the number of lines that will be included in each frame. For
example, assume that the Height parameter is set to 100 and that the camera has just started to
acquire lines. In this case, the camera will accumulate acquired line data in an internal buffer until
100 lines have been accumulated. Once pixel data for 100 lines has accumulated in the buffer, the
camera will recognize this as a complete frame and it will begin to transmit the acquired frame to
your host PC via the GigE network connection. Note that the camera has multiple frame buffers, so
it can begin to acquire lines for the next frame as it is transmitting data for the previously acquired
frame.
Guidelines When Setting the Frame Parameters
When setting the frame parameters, the following guidelines must be kept in mind:
 The sum of the X Offset parameter plus the Width parameter must be less than or equal to the
total number of pixels in the camera’s sensor lines. For example, if you are working with a
camera that has lines with 2098 pixels, the sum of the X Offset setting plus the Width setting
must be less than or equal to 2098.
 The Height parameter must be set below the maximum allowed.
The maximum allowed value for the Height parameter setting will be at least 512, but will vary
depending on your camera model and on how the camera’s parameters are set. The actual
maximum could be considerably greater than 512. To determine the maximum allowed Height
value given your current camera settings:
1. Set all camera parameters other than the Height to your desired values.
2. Use the technique described in the code snippet on the next page to determine the
maximum allowed Height parameter. The value that you retrieve with this technique will
give you the maximum allowed Height with all the other current parameter settings taken
into account.
3. Set the Height parameter to a value that is less than or equal to the allowed maximum.
Note
The absolute maximum for the Height parameter value is 4095. Accordingly, a
single frame may include 4095 lines at most.
This maximum number of lines can, however, not be obtained under all
conditions: In the event of of limitations due to the current camera parameter
settings or due to the transport layer, the camera will automatically decrease
the Height parameter to a suitable value. Each frame will then include fewer
lines than originally set.
Given the current camera parameter settings, check the Height parameter to
see, whether the desired number of lines per frame can actually be obtained.