*From Miss Nancy: canoma was mostly for doing interiors (rooms with rectangular walls) that had
rectangular items in them. trying to do a model from photos is probably too difficult to
describe correctly, but one will just end up with a dull, flat-looking canoma-type model.
*Actually, Canoma was mostly intended for modeling exteriors and especially for angular structures and buildings. It relies on perspective-based photogrammetry so that doing interiors can be problematical due to an inability to get enough perspective changes on walls.  I met one of the developers a couple years back in Palo Alto and he told me how Adobe bought the program and deliberately deep-sixed it because they were fooling with a web-based 3D program that never was completed. He gave me a copy and I actually still use it regularly and have seen it show up cheap on ebay every few months.

My profession is 3D forensic modeling and animation so that I have to often build stuff from scratch to use in legal animations.

The two most commonly used image-based modelers still commercially available are Image Modeler by RealViz and PhotoModeler by Eos Systems. I have also used both of those programs with good success although I actually prefer using Canoma because it is so easy to use. I use it to generate rough 3D shapes that are in proportion and I then import the shapes into a more capable modeler such as Modo or FormZ where I use the Canoma templates as a rough base to work from. I've built everything including vehicles, bridges and buildings using this workflow. Unless you have blueprints or good measurements it can really be a time-saver to help you build a 3D model in good proportion.

Oh, and one other thing that Canoma and these other image modelers does well is to create textures for your 3D surfaces. Let's say you have a couple photos of a billboard. Canoma will do a pretty nice job of correcting the billboard image that you can then edit in photoshop.