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Task #4172 (closed)

Opened 10 years ago

Closed 10 years ago

Make sure that JPEG-2000 decoding works in parallel

Reported by: mlinkert Owned by: mlinkert
Priority: critical Milestone: OMERO-Beta4.3
Component: Bio-Formats Version: n.a.
Keywords: n.a. Cc: callan, dzmacdonald
Resources: n.a. Referenced By: n.a.
References: n.a. Remaining Time: 0.0d
Sprint: 2011-02-24 (6)


We would like to be able to decode JPEG-2000 tiles (as stored in histology formats) in parallel. So, we'll need to test if that works as-is, or if there are bugs that need fixing in the jai-imageio component.

Attachments (1) (3.0 KB) - added by mlinkert-x 10 years ago.

Download all attachments as: .zip

Change History (7)

comment:1 Changed 10 years ago by jmoore

imported from bio-formats:#600

comment:2 Changed 10 years ago by mlinkert

  • Remaining Time set to 1
  • Sprint set to 2011-02-10 (5)

comment:3 Changed 10 years ago by jburel

  • Sprint changed from 2011-02-10 (5) to 2011-02-24 (6)

Moved from sprint 2011-02-10 (5)

comment:4 Changed 10 years ago by mlinkert

  • Remaining Time changed from 1 to 0
  • Resolution set to fixed
  • Status changed from new to closed

See attached test case, which checks the MD5s of tiles read in parallel against the MD5s of tiles read sequentially. All of the tested SVS files pass, so closing this ticket.

comment:5 Changed 10 years ago by jmoore

  • Cc dzmacdonald added

Any observations on the speed up, Melissa?

Changed 10 years ago by mlinkert-x

comment:6 Changed 10 years ago by mlinkert

For me, sequential reading takes about twice as long as parallel reading on average. ParallelTileTest?.java has been updated to print out the number of milliseconds for sequential and parallel reading, so if you like you can see how well it performs.

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