[GRASS-dev] Image Segmentation - GRASS - GSoC report #5

Hello,

GSoC report is below. Also when googling a grass function, I found my code diff’s in the list archives. I hadn’t made the connection that changes in the extensions are also forwarded to everyone that keeps track of source code changes. So I hope my sometimes multiple commits in one day aren’t considered spam? Let me know if I should hold back and only commit 1-2 times per week when more significant tasks are completed.

Have a good weekend,
Eric

---------- Forwarded message ----------
From: Eric Momsen <eric.momsen@gmail.com>
Date: Fri, Jun 22, 2012 at 4:21 PM
Subject: Image Segmentation - GRASS - GSoC report #5
To: soc@lists.osgeo.org

Hi all,

Completed:

Both planned tasks were completed:

  • using linked lists to track segment membership
  • using preexisting information (raster areas, original described as polygons) to constrain the segmentation process

Also Markus M was running the module, and uncovered an error in the algorithm, so next week’s plan for validation is already started :slight_smile:

Plan:

  • Further validation to confirm the segmentation results.
  • Find some way to improve the speed, with improvements to the current code and/or move more data into RAM.
  • Start a second module, to produce statistics for the segments.

(This might be too much…hopefully at least 2 of the 3 tasks can be completed.)

Blocking:

Nothing really. I have some new appreciation for the number of calculations that must be made, the established closed source software runs overnight to segment a typical image…even with that basline I have a long way to go, right now I think the current version here would take 2 years… hurrah for challenges :smiley:

Best regards,
Eric