3d shape measurement system and method including fast three-step phase shifting, error compensation and calibration

摘要: A structured light system for object ranging/measurement is disclosed that implements a trapezoidal-based phase-shifting function with intensity ratio modeling using sinusoidal intensity-varied fringe patterns to accommodate defocus error. The includes projector constructed project at least three onto an are each phase shifted respect the others, camera capturing phase-shifted as they reflected from and processor in electrical communication generating patterns, shifting providing projector, wherein projects sequentially, captures processes captured generate coordinates.