Weird laser video thing
-
Looks very cool, i really want to see the video now, even though i dont particularly like radiohead's music.
-
I've used a lidar...this is a pretty fascinating repurposing of one.
-
Could i ask what they are usually used for?
-
That looks very fun. I can imagine playing around with that for quite a while.
How good are the meshes form the points?
-
It's used more and more in my business (GIS) to make terrain models, they put one in a plane and fly at relatively low altitudes. Pennsylvania is finishing up a project (PAMAP) where they collected LIDAR for the whole state, for example (http://www.dcnr.state.pa.us/topogeo/pamap/index.aspx). In this case it results in massive amounts of data and requires a lot of post processing.
It aint cheap neither.
-
@remus said:
Could i ask what they are usually used for?
It's a digital rangefinder. The distances it collects can be assembled to produce a 3D model. This is the sort to which I had very brief access. Essentially, you pointed it in a certain direction and it returned a point-cloud that could be converted into a mesh.
Here's animated diagram of how it works:
This is all from Wikimedia Commons.
-
@remus said:
How good are the meshes form the points?
Pretty damn messy, the one time I used this. Anything out of "line of sight" of the laser emitter was ignored, so you had to rebuild the missing faces using the faces it did sample. I assume that more sophisticated versions of this (or more sophisticated users) would allow you to move the unit around, fixing its position with GPS, and assemble a more complete scan.
And it was slow, too. Another student at my grad school scanned someone dancing, and then milled out a (very abstract) flowing relief sculpture...the mesh was composed of multiple periods in the dance, frozen into one giant mesh about eight feet long.
Hello! It looks like you're interested in this conversation, but you don't have an account yet.
Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.
With your input, this post could be even better 💗
Register Login
Advertisement