Thank you.
Apologies, I struggle trying to explain myself at the best of times.
I have a number of virtual objects (*.obj) I want to get ~1000 depth images
from x angles. I used the pinpoint camera approximation only to find that
the obj files had so view vertices that getting reasonable depth
information was not feasible. So I can do two things - figure out how to
make my mesh more dense (surface fitting or re-sampling) or do ray tracing
so that I can obtain points wherever my rays intersect with the faces of my
virtual object.
I will then be using these depth images as input for a convolutional neural
net.
On Monday, 23 November 2015 11:20:28 UTC+2, Simon Danisch wrote:
>
> I'm still confused about what you want.
> Google says:
> "In computer graphics, ray tracing is a technique for generating an Image
> by tracing the path of light through pixels in an image plane and
> simulating the effects of its encounters with virtual objects." which is
> pretty much what I understand under ray tracing.
> So what is your goal? Usually ray tracing is used when you want a
> realistically lit render(plot) of a 3d scene, or if you have some
> implicitely defined geometry ( like steve kelly pointed out).
> Usually you have a mesh in an obj file, which you would only ray trace
> when you need photo realism (since it's way slower then any other
> displaying method).
> I'm really unsure, why you want to get out a 3d matrix in the end. Do you
> want to compute a lightfield?! Or do you want to have an interpolated voxel
> representation of that mesh in a dense volume? This is probably not what
> you really want and also not what a ray tracer produces.
> The last thing I can imagine is, that you actually have only
> vertices(points) in your obj file without any faces, which then wouldn't
> really show up in a plot, so that you started assuming it's not dense
> enough. I wouldn't call pointclouds a complex geometry though, since its
> one of the most simplest.
> If that's the case, you should just visualize them as particles.
> Here is how you would do that in GLVisualize:
> Using FileIO, GLVisualize
> obj = load("pathtoobj.obj")
> points = vertices(obj)
> w,r = glscreen()
> view(visualize(points))
> r()
>
> If you have problems with that example, please file an issue on github
> under GLVisualize.jl.
>
>
> Best,
> Simon
>
>
