Software for finding repeating items/patterns in point cloud

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neeravbm
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Re: Software for finding repeating items/patterns in point c

Post by neeravbm » Mon May 08, 2017 1:12 am

Thanks, Jed!

Which software do you currently use for segmentation and assigning points to classes? If it's not too inconvenient, would you mind showing me how you do this via screenshare over skype or Google Hangout?

You mentioned that in version 1.0 of the classification platform, you would like to see extremely efficient manual segmentation tools. Do you have any opinion on what kind of tools will be useful to you?

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Re: Software for finding repeating items/patterns in point c

Post by Scott » Mon May 08, 2017 5:04 pm

jedfrechette wrote:...
So far in this thread research on 3 very different approaches to related, but slightly different problems, has been referred to: Building Parser, ScanNet, and Semantic3D. Noteably, none of the algorithms tested in these papers perform very well, struggling to achieve even 80% accuracy. That's not even close to the level of accuracy you would need in a fully automatic production system. I don't say that as a criticism of the researchers, who are doing really important fundamental work; but simply to acknowledge that there is a long way to go before we have workable 1-click solutions.
...
In the mean-time, all of us practitioners have datasets, which are getting bigger and bigger, to deliver. To me a useful version 1.0 for a classification platform would have nothing more than extremely efficient manual segmentation tools. We're going to need to fix the classification for 20+ % of the data anyway, so we need to be able to do that efficiently. Any automatic tools, that even barely work would be a bonus at this point.
...
Since medical imaging got brought up, I would also point out that if you look at many of their classification tools the goal is not to take humans out of the loop it is to help humans work more efficiently. I think that's a good approach. After 4 million years of evolution we've gotten very good at identifying patterns.
Jed,
Excellent post and links. Building Parser, though slow and not especially useful (for me), was the closest to a viewer that combined a segmentation window, a point cloud window, and a on/off layer control box in one place...nice. Check out some of the many DICOM viewers out there -their ability to transform complex 3D objects into fluid 2D orthoviews is pretty cool and informative:https://idoimaging.com

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Re: Software for finding repeating items/patterns in point c

Post by jedfrechette » Sun May 21, 2017 9:43 pm

neeravbm wrote:
Mon May 08, 2017 1:12 am
Which software do you currently use for segmentation and assigning points to classes? If it's not too inconvenient, would you mind showing me how you do this via screenshare over skype or Google Hangout?
We use PolyWorks, which is far from an ideal solution for this particular task. I'd be happy to do a video chat to show what we're up against and how we currently try to deal with it.
neeravbm wrote:
Mon May 08, 2017 1:12 am
You mentioned that in version 1.0 of the classification platform, you would like to see extremely efficient manual segmentation tools. Do you have any opinion on what kind of tools will be useful to you?
As you may have guessed I've got lot's of opinions. :D It's a little out of date now, but I actually started putting together a user requirements doc a couple years ago with the idea of developing something internally if no commercial developer was going to meet our needs.

At the highest conceptual level, I think 3D texture painting applications like Mari provide a good inspiration for what good manual classification tools and UI could look like. Texture painting apps need to meet similar user requirements. Namely, the user needs to quickly and efficiently apply attribute values to portions of potentially large and complex 3D objects.
Jed

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