Code Minimization for Fringe Projection Based 3D Stereo Sensors by Calibration Improvement
This work addresses the challenge of making fringe projection sensors real-time applicable for 3D measurement applications, representing an incremental improvement in calibration techniques.
The paper tackles the problem of reducing processing time in fringe projection based 3D stereo sensors by eliminating the need for Gray code or other additional codes, achieving this through a method that uses only a sequence of sinusoidal images, double triangulation, and improved projector calibration.
Code minimization provides a speed-up of the processing time of fringe projection based stereo sensors and possibly makes them real-time applicable. This paper reports a methodology which enables such sensors to completely omit Gray code or other additional code. Only a sequence of sinusoidal images is necessary. The code reduction is achieved by involvement of the projection unit into the measurement, double triangulation, and a precise projector calibration or significant projector calibration improvement, respectively.