logo

Tag : PhotoScan

13 Jan 2015

Car scanning with Photogrammetry

A new technique we have been working on for scanning full colour reflective objects using photogrammetry.

This is our second test and there is still a lot of room for improvement, objects with multiple reflective layers such as headlights are a problem as you can see from the mesh but we should be able to solve this in the coming weeks.

For the purposes of this test we deliberately chose the hardest possible car to scan, reflective white paintwork, multicolored livery and lots of pure black shiny plastic, a photogrammetry nightmare to say the least!

CarScan01

We’re using AGI PhotoScan to process over 480 images resulting in nearly 1,000,000 Tie points and a Dense point cloud of 168,000,000 points

AGI1

AGI-2   AGI-3  AGI-5

Once the scan is processed we end up with a fully textured 3D model consisting of about 11 million triangles, As I mentioned before there are still some issues with the lights and there is a lot of noise in and around hard to scan areas such as under the arches and along the bottom of the diffuser.

CarScan02

CarScan03

CarScan04

 

27 Feb 2013

Scanning an environment with Agisoft

This is a very simple environment scanning test using a single camera and Agi PhotoScan, I know its been done before 1000 times but the results are very encouraging.

Point cloud view in Agi, again this was a quick test and amounted to nothing more than a few shots with a DSLR. Next time we do this we are going to try a multi camera approach to try and capture an entire section of the environment with one shot.

 

We didn’t take any top down shots of the rock hence the horrible sky coloured bubble.

Agisoft photoscan

The texture maps are average baked at 7,000 x 7,000 for this example, they are not bad but poor lighting on the day means there is a lot of baked in shadow.

Agisoft photoscan

It really is a very easy thing to do, it should be interesting to see how far we can push it. Being able to capture a clean detailed textured environment has so many potential applications Imagine a photo realistic environment like this running in unity with an oculus rift, watch this space 🙂