AW00089317000 Chunk Features
Basler ace GigE 313
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
included in the pylon API. Once the chunk parser has been used, you can retrieve the extended
image data by doing the following:
Read the value of the
Chunk Offset X parameter.
Chunk Offset Y parameter.
Chunk Width parameter.
Chunk Height parameter.
Chunk Pixel Format parameter.
Chunk Dynamic Range Min.
Chunk Dynamic Range Max.
The following code snippet illustrates using the pylon API to run the parser and retrieve the
extended image data:
// retrieve date from the extended image data chunk
IChunkParser &ChunkParser = *Camera.CreateChunkParser();
GrabResult Result;
StreamGrabber.RetrieveResult( Result );
ChunkParser.AttachBuffer( (unsigned char*) Result.Buffer(),
Result.GetPayloadSize() );
int64_t offsetX = Camera.ChunkOffsetX.GetValue();
int64_t offsetY = Camera.ChunkOffsetY.GetValue();
int64_t width = Camera.ChunkWidth.GetValue();
int64_t height = Camera.ChunkHeight.GetValue();
int64_t dynamicRangeMin = Camera.ChunkDynamicRangeMin.GetValue();
int64_t dynamicRangeMax = Camera.ChunkDynamicRangeMax.GetValue();
ChunkPixelFormatEnums pixelFormat = Camera.ChunkPixelFormat.GetValue();
For more information about using the chunk parser, see the sample code that is included with the
Basler pylon Software Development Kit (SDK).