Dalsa C1240, User Manual

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204 • Operational Reference Nano Series GigE Vision Camera
Extracting Metadata Stored in a Sapera Buffer
For Sapera LT developers, a new class “SapMetadata” is now included with Sapera version 8.10.
For users of earlier versions of Sapera 8.xx, please contact Teledyne DALSA technical support.
Sapera also provides two methods to view metadata. The Sapera CamExpert tool provides a tab
(when the Metadata feature is enabled) to view the metadata of the last frame capture, as shown
by the following image.
Alternatively, Sapera LT provides a demo program called GigEMetaDataDemo.exe which will grab a
number of frames and display the metadata or save it to a file (.csv). In addition, source code and
C++ project files are included for a console based executable.
The following figure shows the Sapera Explorer tool screen with the Metadata Example highlighted.
Important:
When an internal Nano Test Image is selected, the Metadata feature values for Exposure Time
(ExposureTime) and Exposure Delay (exposureDelay) are not valid values and must be ignored.
When in free running (not triggered) mode, the Metadata value for feature Exposure Delay
(exposureDelay) is not a valid value and must be ignored.
The value of LineStatusAll is updated on the start of exposure.
Currently the metadata value for “analogGain” is invalid for all On-Semi sensor models.
For Sony sensor models, the metadata “analogGain” represents the raw gain value divided by 100.