Three-dimensional subject comparison with efficient processing

A computer-readable medium containing instructions that, when executed on a computing platform, cause the computing platform to perform operations comprising:

• accessing captured geometry of the actual subject;
• accessing the 3D model;
• computing a first comparison result representing a difference between coarse representations of the captured geometry and of the 3D model;
• determining target portions of the first comparison result that exceed a threshold;
• and
• computing a second comparison result representing a difference between fine representations of the captured geometry and the 3D model, wherein the second comparison result is computed for only those portions of the captured geometry and the 3D model that correspond to the target portions of the first comparison result.

A method for comparing an actual subject and a computed 3D model of the subject, the method being executed by a computing platform, and comprising:

• accessing captured geometry of the actual subject;
• accessing the 3D model;
• computing a first comparison result representing a difference between coarse representations of the captured geometry and of the 3D model;
• determining target portions of the first comparison result that exceed a threshold;
• and
• computing a second comparison result representing a difference between fine representations of the captured geometry and the 3D model, wherein the second comparison result is computed for only those portions of the captured geometry and the 3D model that correspond to the target portions of the first comparison result.