Ticket #1669 (closed defect: fixed)
Opened 2013-03-07T12:12:22-06:00
Last modified 2013-06-07T15:11:28-05:00
Break reliance on Imglib2's PlanarContainer
| Reported by: | bdezonia | Owned by: | curtis |
|---|---|---|---|
| Priority: | major | Milestone: |
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| Component: | Data Model | Version: | |
| Severity: | serious | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | #20 |
Description (last modified by bdezonia)
Internally IJ2 represents all data as an in-memory set of planes using PlanarContainer. There is some support for virtual stacks in Imglib but they are not yet in use by IJ2.
We should define a container that refers to pixel data in a virtual fashion. When memory is plentiful all data is kept in ram but when memory is low data is paged to disk. This should avoid out of memory problems.
This virtual container should easily be able to handle a very large number of planes. If the virtual container breaks data into subimages for paging purposes we would also be on the way towards supporting the analysis of very large image planes too.
This virtual data structure will complicate how data is translated across the legacy layer. But there is already some support in place for non-planar structures.
Change History
comment:3 Changed 2013-04-12T10:50:42-05:00 by bdezonia
As noted elsewhere:
there are two test implementations of a file backed Img in imlgib2 branches: fileimg (by Tobias) and toy-file-backed-img (by Barry)
comment:4 Changed 2013-05-31T15:51:06-05:00 by bdezonia
The scifio-cells branch supports opening large images as CellImg backed data. Some caching is in place but it needs to be enhanced for beta 8. The design that is going in place does not handle caching of subplanes.
comment:5 Changed 2013-06-07T15:11:28-05:00 by curtis
- Status changed from new to closed
- Resolution set to fixed
The scifio-cells branch has been merged; ImageJ2 now uses CellImg transparently where appropriate. There is no more explicit reliance on PlanarImgs.