Trimensional: 3D Scanner for iPhone

Post by chancho » Fri, Jan 07, 2011, 4:05 AM UTC

lliiffee wrote: post #3

Looks like it just uses the reflected intensity to estimate the depth, then pastes the original colormap on top of that? Incredibly clever and simple hack.

If it were that easy, the eyebrows and lips would be sunken inward because they are darker then the surroundings.

More like (I'm guessing) it uses the change in reflected intensity with respect to the change in light position to estimate a surface normal (e.g., forehead is the same for all light positions, left side of your nose is bright when the left light is on, dark when the right light is on, right side of nose vice versa, etc). It then finds a surface that agrees with these normals by solving a partial differential equation. Clever, not simple. (Although I guess it's a compliment to say they make it look easy.)

Post by dy » Sun, Jan 09, 2011, 6:37 PM UTC

greendestiny wrote: post #36

dy wrote: post #23

Earlier quoted context omitted.

What are good resources for looking into converting photos into 3d object models? I'm really impressed by Shapeways but would like to take current real-world objects as a base rather than building them in a 3D tool etc. I've seen the laser scanners but they're relatively expensive. Is there anything like a mount that takes two iphones, and software that can take those two photos to create atleast a projection?

There are a lot of approaches. Yes there is software that takes two photos and let you reconstruct 3d. If you have a man-made object you probably don't want a generic point-cloud building approach (like say http://www.photosculpt.net/ ) - but rather something like Photomodeler that lets you select vertices and build up surfaces. There is also software that builds models from silhouette methods, that usually require y…

Thanks for the information, it was very helpful.

Re: Trimensional: 3D Scanner for iPhone

Re: Trimensional: 3D Scanner for iPhone