Translator Disclaimer
1 September 2008 Improved composite-pattern structured-light profilometry by means of postprocessing
Author Affiliations +
Structured-light illumination (SLI) means projecting a series of structured or striped patterns from a projector onto an object and then using a camera, placed at an angle from the projector, to record the target's 3-D shape. For multiplexing these structured patterns in time, traditional SLI systems require the target object to remain still during the scanning process. Thus, the technique of composite-pattern design was introduced as a means of combining multiple SLI patterns, using principles of frequency modulation, into a single pattern that can be continuously projected and from which 3-D surface can be reconstructed from a single image, thereby enabling the recording of 3-D video. But the associated process of modulation and demodulation is limited by the spatial bandwidth of the projector-camera pair, which introduces distortion near surface or albedo discontinuities. Therefore, this paper introduces a postprocessing step to refine the reconstructed depth surface. Simulated experiments show an 78% reduction in depth error.
©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)
Chun Guan, Laurence G. Hassebrook, Daniel L. Lau, V. G. Yalla, and Charles J. Casey "Improved composite-pattern structured-light profilometry by means of postprocessing," Optical Engineering 47(9), 097203 (1 September 2008).
Published: 1 September 2008


Back to Top