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Bobbyboys Photogrammetry Thread
show user profile  Bobbyboy
Hey guys,

Long time since my last post, but I have been playing around more and more lately with photogrammetry and thought I might post some of my results.

Obviously I have always been into photography and have an extensive collection of cameras and lenses and I've always had an interest in 3d modeling, so photogrammetry seemed like a perfect mashup of the two interests. The below examples are all captured using my Sony RX1 with Ziess 35mm F2.0 lens set at F8.

Most are generated from minimal photos, between 8 and 30 depending on the scene but nothing crazy like I see in some of the photogrammetry groups where people are making reconstructions from thousands of photos and generating models with billions of polygons. I've only got 16gb of ram in my machine so I'm trying to keep things a bit more manageable.

This is my most recent scan made using 26 photos and a fair bit of clean up in Zbrush and other programs

Any suggestions or crits are always appreciated! :D

read 399 times
10/15/2017 3:46:08 AM (last edit: 10/15/2017 3:46:08 AM)
show user profile  Bobbyboy
Here are a couple more

read 397 times
10/15/2017 3:47:17 AM (last edit: 10/15/2017 3:47:17 AM)
show user profile  Bobbyboy
Here are a couple of renders I did earlier in the year with my first photogrammetry attempts

read 396 times
10/15/2017 4:27:28 AM (last edit: 10/15/2017 4:28:28 AM)
show user profile  Bobbyboy
I've also been playing around with normal map capture using photometric stereo scanning. For this I've been using a great little program called Dabarti Capture, created by Tomasz Wyszolmirski.

The setup

The results:

read 393 times
10/15/2017 4:37:38 AM (last edit: 10/15/2017 4:37:38 AM)
show user profile  nemac
that looks awesome for closeups!
read 386 times
10/15/2017 8:19:09 AM (last edit: 10/15/2017 8:19:09 AM)
show user profile  Error404
Looks great!

If you can control the lighting for your close up textures, you can polarize the lights, and counter polarize the camera, and get a pretty good reflection map when you difference the polarized shot with the non polarized shot. -

read 372 times
10/15/2017 5:45:24 PM (last edit: 10/15/2017 5:46:38 PM)
show user profile  Bobbyboy
Thanks for the tip mate. I've been wanting to try cross polarization for a while but haven't gotten around to purchasing the film. When I do, I'll be sure to post my tests! :D

read 364 times
10/15/2017 10:21:21 PM (last edit: 10/15/2017 10:21:21 PM)
show user profile  nemac
How do you polarize the lights? Hmm will look into it. Would be great for using leaves with onyx tree or similar
read 323 times
10/18/2017 10:32:04 PM (last edit: 10/18/2017 10:32:04 PM)
show user profile  ScotlandDave
Really cool stuff man.

Website | Blog | Contact | Vimeo

read 308 times
10/19/2017 4:13:34 PM (last edit: 10/19/2017 4:13:34 PM)
show user profile  Bobbyboy
Thanks mate,

@Nemac, You need to get some polarizing film and place it over your light sources, and then use a polarizing filter on your camera.

Here is another rock wall I did up last night.

The big problem I am having is unwrapping the complex surface details to get decent textures. Currently for these, I am putting a seam around the front and have been trying to use pelt map to flatten the details out, but it doesn't do a very good job in the middle and distorts everything towards the edges. Is there a better way to go about unwrapping something like this?

read 273 times
10/22/2017 10:14:24 PM (last edit: 10/22/2017 10:14:47 PM)
show user profile  khamski
Very interesting stuff!
Keep it up. This technics can be very useful in production.

read 259 times
10/23/2017 9:59:16 AM (last edit: 10/23/2017 9:59:16 AM)
show user profile  Bobbyboy
Here is another attempt at that last rock face.

I'm still not very happy with the texture projection but the uv's make a bit better use of the space

read 206 times
10/26/2017 10:41:40 PM (last edit: 10/26/2017 10:41:40 PM)
show user profile  Bobbyboy
Another attempt at scanning a tree stump

read 93 times
11/12/2017 6:28:17 AM (last edit: 11/12/2017 6:28:17 AM)
show user profile  Bobbyboy
Quick and dirty vray render with the last tree stump I scanned, just playing around to test it out. Though I would love to come up with an interesting scene to create and render using some of the assets I have created.

read 42 times
11/16/2017 9:31:38 PM (last edit: 11/16/2017 9:31:38 PM)
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