You need ImageJ, which is written in Java, which means you can run it on just about anything. This very powerful but easy to use graphics program was developed at the National Institutes of Health in Bethesda, Maryland and is in the public domain. Downloadable distributions are available for Microsoft Windows, Mac OS, Mac OS X and Linux.
I downloaded it from http://rsbweb.nih.gov/ij/, unzipped it, and had it up and running in less than five minutes. 1) I launched the program using the provided program, 2) clicked on open a file, 3) selected an image of the face from the Shroud that I had save to my computer, 4) clicked on Plugins > 3D > Interactive 3D Surface Plot and 5) tweeked some settings (see the image below – smoothing is essential).
It is highly interactive and re-plots 3D views almost instantaneously when you change a setting. It works with many image formats and, to my amazement, worked well with color and b&w images as large as 3072 by 2304 pixels and as small as 150 by 112.
I loaded body images, I loaded Luigi Garlaschelli generated image (he failed with the 3D), etc. It was fun. I plan to incorporate it into presentations. It is that easy to use.