Smartek Vision Giganetix GC Series User Manual page 158

A list of chunk features is shown in Table 76.
Note The PayloadType of the camera changes from PayloadImage to PayloadChunkData.
On receiving images containing chunk data, the chunk information can be read using the following code:
if (imageInfo->IsReadable("ChunkNAME"))
TYPE value;
imageInfo->GetChunkNode("ChunkNAME")->GetTYPENodeValue(value);
By reading chunks this way, it can be made sure that it is included into the image before it us tried to be
accessed and what makes sure that application will not crash if chunk is accidently not sent.
Table 77 shows important C++ functions related to chunk data, a full description of interface and further
supported languages can be found in the API documentation located in the GigEVisionSDK installation
folder.
Function
device->IsAvailable ("ChunkModeActive")
device->SetBooleanNodeValue
"ChunkModeActive", value)
device->Set(TYPE)NodeValue
"ChunkSelector", "ChunkName")
device->SetBooleanNodeValue
"ChunkEnable", double value)
imageInfo->IsReadable
imageInfo->GetChunkNode->
"ChunkNAME")->GetTYPENodeValue
Chunk Feature
ChunkGain
ChunkExposureTime
ChunkCounterValue
ChunkUserIntValue
Table 76: Additional chunks
(
(
(
("ChunkName")
(
(value)
Table 77: Chunk mode - Access through API
5 Image Transmission over Gigabit Ethernet
Description
Gain applied to the image
Exposure time of the image
Selected counter value
User defined integer value
Returns true if ChunkMode is available or false if
Enable or disable ChunkMode.
Select chunk to enable or disable.
Enable or disable selected chunk.
Returns true if user can access selected chunk and
read data from it.
Used to read data from chunk. User should first
check if he can access selected chunk.
152
Description
not.
SMARTEK Vision Giganetix User Manual Version 2.1.4