1. A dual-projector three-dimensional (3D) scanner, comprising: a structured-light projection subsystem, comprising a first projector configured for projecting a first light pattern onto an object, and a second projector configured for projecting a second light pattern onto the object; a camera for capturing pattern images of the first light pattern reflected from the object or the second light pattern reflected from the object; and a computing-and-control subsystem communicatively coupled to the structured-light projection subsystem and the camera, the computing-and-control subsystem configured to: (i) obtain the object's scanning requirements, (ii) activate, depending on the object's scanning requirements, either the first projector or the second projector, (iii) capture, using the camera, a pattern image, and (iv) process the pattern image to produce a range image.