CGTalk > Techniques > Modeling
Login register
Thread Closed share thread « Previous Thread | Next Thread »  
 
Thread Tools Search this Thread Display Modes
Old 03-03-2013, 06:08 AM   #1
VisitorfromArea51
Veteran
portfolio
Brian Chapman
Not Private Joker
Las Vegas, USA
 
Join Date: Jan 2013
Posts: 49
Processing LIDAR Data

I'm processing LIDAR data and developing point clouds to model from, which is basically a surface with millions of points. LIDAR develops random spikes hundreds of feet above or below ground. I need to know the best way to remove random spikes (other than create complex algorithms to run against a database or something).

Also, lidar has difficulty with vertical faces / shadows, creating "streaks" in a model. I'd like to remove those streaks somehow by either weeding the vertices, points, or mesh smoothing or something, but need to maintain the edges as best as possible. See this graphic for clarification:

http://www.noaanews.noaa.gov/stories/images/wtc2.jpg

Anyone have any advice to help me?

I have Maya, 3D studio Max, and Civil 3D from autodesk.

Thank you!
 
Old 03-03-2013, 11:32 PM   #2
Meloncov
Expert
 
Meloncov's Avatar
portfolio
Kevin Baker
Freelance Modeller
Oakland, USA
 
Join Date: Sep 2007
Posts: 1,360
I've used LIDAR data some, and I've never run into anything as bad as in you example. There are a few off points, but few enough to make hand-fixing them fairly easy. Are you sure there isn't a problem with how you're converting the LIDAR data into a model?
__________________
kevinbakercg.com
 
Old 03-03-2013, 11:48 PM   #3
VisitorfromArea51
Veteran
portfolio
Brian Chapman
Not Private Joker
Las Vegas, USA
 
Join Date: Jan 2013
Posts: 49
Clarification

Quote:
Originally Posted by Meloncov
I've used LIDAR data some, and I've never run into anything as bad as in you example. There are a few off points, but few enough to make hand-fixing them fairly easy. Are you sure there isn't a problem with how you're converting the LIDAR data into a model?


I should clarify the LIDAR data being used is USGS. I believe it's a common problem with there data sets but can't find anyone who knows about this stuff :/ I had assumed some vegetation were spikes, but when I figured how to filter the point cloud realized the actual spikes weren't that bad. I was able to remove.

Thanks!
 
Old 03-03-2013, 11:48 PM   #4
CGTalk Moderation
Lord of the posts
CGTalk Forum Leader
 
Join Date: Sep 2003
Posts: 1,066,481
Thread automatically closed

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
__________________
CGTalk Policy/Legalities
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
 
Thread Closed share thread


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
CGSociety
Society of Digital Artists
www.cgsociety.org

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump
Miscellaneous

All times are GMT. The time now is 08:50 PM.


Powered by vBulletin
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.