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jan

Recording depth map from the kinect

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Do you guys if it's possible to record the depth map from the kinect together with the rgb channels into disk for later usage ? Preferably in float. And video not just images.

 

Thanks.

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Found this :

Free

http://rgbdtoolkit.com/tutorials.html

 

you can calibrate a dlsr to work with it. Supposedly allow to get an 8bit .png depth sequence which encoding seems strange.

 

 

Other options :

99$

http://www.brekel.com/brekel-kinect-pro-pointcloud/download-trial-buy/

 

640x480 .exr sequence according to the test files

 

 

 

 

Haven't really tested those options

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Did you use the depth map? I found its quite unusable when objects cast shadows seen by one of the camera.

There's a tear in the map then.

 

Brekel can output also a world position pass for nuke which could be nice if these problems weren't there.

 

 

Which app did you find reliable and precise for 3D scanning ?

 

reconstructme seemed to have nice features and the example showed in this video look ok, but the tests with the app were disappointing.

http://www.openni.org/files/reconstructme-sdk/

 

So far skanect looks fine

 

 

I didn't try other apps (artec etc) because of their complicated licensing schemes.

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I used a Kinect to scan my actress for my last short film and had some interesting experiences. Depth Maps are really tricking to work with because of the shadows they create. The Kinect records them as a pure black which creates dead spots in your map.

 

What do you want to use the map for?

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I was trying to apply some kind of non photorealistic filter on moving images,
b2g3.jpg

On 2D it works ok but i wanted to try to have some normals, depth information so the texture could follow the surface a bit more. Still in screen space but bend a bit, maybe with some contour, shape lines (with a shader in nuke?)
Just experimenting.

I guess to avoid the dead spot you'll need two or three kinect, a point cloud and a video projection on it based on a good camera.
Not a very portable solution...

 

 

Edited by jan

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Yeah, I've used depth maps from Brekel a lot, especially for the Halo 4 Librarian cinematic.

 

http://www.youtube.com/watch?v=8iCrI98juwY

 

They didn't have to be super clean for what we were doing, though. We were always going for something pretty abstract--the shadows were used to our advantage.

Edited by Aaron Scott

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