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11.4 Chunk Data
The chunk provides additional information about the respective image (e.g. the time-
stamp). When using Baumer LXC cameras, this information is encoded into the last eight
pixels of the image.
This additional information can include:
Information Description
CRC32
Delivers a checksum which ensures that the image is transmitted
correctly.
RegionID
Delivers the ID of the Region (Multi-ROI)from which the image
originates.
FrameID
Delivers a unique ID for the image in the form of a number.
Timestamp
Delivers a timestamp for each image.
Beginning of image
(pImageStart)
The chunk data is assigned to the last 8 pixels as follows, depending on the settings:
Combination
Pixel
n-7
Pixel
n-6
Pixel
n-5
Pixel
n-4
Pixel
n-3
Pixel
n-2
Pixel
n-1
Pixel
n
1
Bit 0
Timestamp
Bit 63
2
Bit 0
CRC32
Bit 31 Bit 0
RegionID
Bit 31
3
Bit 0
CRC32
Bit 31 Bit 0
FrameID
Bit 31
4
Bit 0
FrameID
Bit 31 Bit 0
RegionID
Bit 31
5
Bit 0
RegionID
Bit 31 Bit 0
0
Bit 31
6
Bit 0
FrameID
Bit 31 Bit 0
0
Bit 31
7
Bit 0
CRC32
Bit 31 Bit 0
0
Bit 31
Notice
The programming of the chunk request is described in the document:
AN201517_Baumer_Application_Note_Chunk_LXC_EN.pdf
Latest software version and technical documentation are available at:
www.baumer.com/vision/login
(Registration required.)
