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Stream Statistics

Every Data Stream of Coaxlink features a Stream Statistics Tool that monitors the image data stream at the card output and provides the application with averaged frame-, line- and data-rate.

Stream Statistics Sampling Methods

The sampling method determines the averaging interval. It can be any of the following:

  • LastSecond or LastTenSeconds: The last completed time slot of 1 or 10 seconds.
  • Last2Buffers, Last10Buffers, Last100Buffers, Last1000Buffers: The last 2, 10, 100, or 1000 acquired buffers
  • LastAcquisition: The last acquisition activity period. Namely since the last DSStartAcquisition() function call until now, if the acquisition is still active otherwise until the last DSStopAcquisition() function call.
  • LastAcquisition: Time interval between StatisticsStartSampling and StatisticsStopSampling commands.

The default sampling method is LastSecond.

Statistical Data

The statistical data is effectively computed when getting any of the following feature:

  • StatisticsFrameRate reports the averaged frame rate expressed in in frames/second (area-scan).
  • StatisticsLineRate reports the average line rate expressed in lines/second (line-scan).
  • StatisticsDataRate reports the average data rate expressed in megabytes/second

For every GenTL buffer filled during the averaging interval, the tool counts:

  • The number of filled GenTL buffers and the corresponding number of frames (area-scan) or lines (line-scan)
  • The number of transferred bytes of image data.

The related GenICam features rare gathered into the Stream Statistics Category of the GenTL Data Stream Module.