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Add group_by for tilefetcher-based ImageStack construction #1796

Merged
merged 1 commit into from
Feb 7, 2020
Merged

Add group_by for tilefetcher-based ImageStack construction #1796

merged 1 commit into from
Feb 7, 2020

Commits on Feb 6, 2020

  1. Add group_by for tilefetcher-based ImageStack construction 

    When we construct an ImageStack from a tilefetcher, we now allow accept a `group_by` parameter which controls how we load the data.  If an axis is in the `group_by`, then we load all the data for any given value for that axis before moving on to another value for that axis.

For instance, if Axes.ROUND is in `group_by`, then we will load all the data for round=0 before we load the data for round=1.

Test plan: Added tests to verify that the loader works with a variety of `group_by`s.  Dan Goodwin's 3D data loads in 100seconds now instead of 10 minutes.
    Tony Tung committed Feb 6, 2020
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