Add spectrum plotting of data in the Live Viewer via Dask #2336
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MikeSullivan7
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Issue
Progresses #2327
Description
Dask has been used to create a DaskImageDataStack in the Live Viewer Model which lazily loads the incoming images into a Dask Array. This Dask Array is then used to display and do stack-wide operations (i.e. calculate the mean spectrum within an ROI) on the incoming data without having to load the full stack into RAM and could therefore be useful for PCs with low RAM. The Dask-style of handling the data can be toggled on or off by right-clicking the image > Operations > Calculate Spectrum. If the checkbox is unchecked, the Live Viewer falls back to its older functionality.
Testing
Make sure all tests pass
Acceptance Criteria
Open the Live Viewer and point it to a empty test folder, and toggle the Spectrum Calculation on via the right-click menu.
Use the
simulate-live-date.pyscript to move images into the test folder and check that the spectrum is calculated and updated with every new image, and it is at a level that you would expect (i.e. verify this with the Spectrum Viewer).While in operation, try moving the ROI and check that the Spectrum is recalculated and updates in the window accordingly.
Documentation
Release note