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Velocity event analysis

Velocity event analysis lets you mark and analyze discrete events on the velocity results for a line scan kymograph ROI — for example, transient flow events visible in the kymograph or velocity plot.

Events are managed in the Velocity panel, below the Radon velocity controls. There is no separate left-toolbar icon for this workflow.

Before you start

Run velocity analysis first

Complete velocity analysis for the selected file, channel, and ROI. Event controls stay disabled until Radon velocity results exist for that selection.

Run velocity event analysis in the GUI

  1. Select the file, channel, and ROI in the file list.
  2. Open the left toolbar and click Velocity.
  3. Confirm Radon velocity results are present (run Run Radon Analysis if needed).
  4. Scroll down in the Velocity panel to the Events section.
  5. Use the event toolbar:
    • Add — click, then click and drag in the 2D plot to set the event time range.
    • Edit — select an event in the table, click edit, then drag a new range in the plot.
    • Delete — remove the selected event.
    • Select next — move selection to the next event in the table.
    • Cancel — cancel an in-progress add or edit.
  6. Toggle Show events to show or hide event overlays on the plot.
  7. Adjust Event parameters if needed.
  8. Click Run/Reanalyze Events to compute event statistics.
  9. Review the event table and Results summary.
  10. Use Save in the main toolbar to persist events and analysis state.

While adding or editing an event, CloudScope shows a notification asking you to click and drag in the 2D plot to set the event range.

Results and reproducibility

Review event statistics in the Velocity panel Events section and on the analysis plots. Save from the top header to persist event definitions and results in the JSON file for the source image.

The GUI and scripting workflows share the same acqstore backend. See Saved file formats for how event analysis is stored.

Saved files

Event analysis state is stored in the acquisition JSON file (my_file.tif.json) together with velocity results and ROI data. There is no separate event CSV file.

See also