Basler ace acA640-90gm - Making the Chunk Mode Active and Enabling the Extended Data Stamp

Chunk Features
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11.2 Making the "Chunk Mode" Active and
Enabling the Extended Data Stamp
Before you can use any of the camera’s "chunk" features, the "chunk mode" must be made active.
Making the chunk mode active does two things:
 It makes the Frame Counter, the Trigger Input Counter, the Time Stamp, the Line Status All,
and the CRC Checksum chunk features available to be enabled.
 It automatically enables the Extended Image Data chunk feature.
To make the chunk mode active:
 Set the Chunk Mode Active parameter to true.
You can set the Chunk Mode Active parameter value from within your application software by using
the Basler pylon API. The following code snippet illustrates using the API to set the parameter
value:
Camera.ChunkModeActive.SetValue( true );
Note that making the chunk mode inactive switches all chunk features off.
Also note that when you enable ChunkModeActive, the PayloadType for the camera changes from
"Pylon::PayloadType_Image" to "Pylon::PayloadType_ChunkData".
For detailed information about using the pylon API, refer to the Basler pylon Programmer’s Guide
and API Reference.
You can also use the Basler pylon Viewer application to easily set the parameters.
Once the chunk mode is active and the Extended Image Data feature has been enabled, the
camera will automatically add an "extended image data" chunk to each acquired image. The
extended image data chunk appended to each acquired image contains some basic information
about the image. The information contained in the chunk includes:
 The X Offset, Y Offset, Width, and Height for the AOI
 The Pixel Format of the image
 The Minimum Dynamic Range and the Maximum Dynamic Range
To retrieve data from the extended image data chunk appended to an image that has been received
by your PC, you must first run the image and its appended chunks through the chunk parser