Robust structured light pattern for use with a hologram in 3D endoscopy

This paper introduces a novel structured light pattern designed to be compatible with the hologram projection. The proposed pattern is a De Bruijn-based sequence applied to a combination of continuous and dashed lines for the pattern. The sequence is coded in the period in the period and duty cycles of the dashed lines. It provides 16 different lines which limits to 2 the required number of lines needed for identification. The segmentation has been made easier by alternating continuous and dashed lines. As required by the use of holograms, the sequence has been adapted by making it symmetric. It has been improved by guaranteeing a hamming distance equal to two for two successive dashed lines. The implementation on a virtual model has shown that subpixel accuracy has been achieved. We developped this pattern for 3D endoscopy.

[1]  Tao T Wu,et al.  Optical imaging for medical diagnosis based on active stereo vision and motion tracking. , 2007, Optics express.

[2]  Tuvi Etzion,et al.  Constructions for perfect maps and pseudorandom arrays , 1988, IEEE Trans. Inf. Theory.

[3]  Li Zhang,et al.  Rapid shape acquisition using color structured light and multi-pass dynamic programming , 2002, Proceedings. First International Symposium on 3D Data Processing Visualization and Transmission.

[4]  Pierre Graebling,et al.  Robust Structured Light Coding for 3D Reconstruction , 2007, 2007 IEEE 11th International Conference on Computer Vision.

[5]  Dan Ionescu,et al.  A high precision 3D object reconstruction method using a color coded grid and NURBS , 1999, Proceedings 10th International Conference on Image Analysis and Processing.

[6]  F. MacWilliams,et al.  Pseudo-random sequences and arrays , 1976, Proceedings of the IEEE.

[7]  Joaquim Salvi,et al.  A state of the art in structured light patterns for surface profilometry , 2010, Pattern Recognit..

[8]  Peter Eisert,et al.  Adaptive colour classification for structured light systems , 2009 .

[9]  Mikko Nuutinen,et al.  Method for measuring stereo camera depth accuracy based on stereoscopic vision , 2011, Electronic Imaging.

[10]  Joaquim Salvi,et al.  Recent progress in coded structured light as a technique to solve the correspondence problem: a survey , 1998, Pattern Recognit..

[11]  Charles Beumier,et al.  Design of coded structured light pattern for 3D facial surface capture , 2004, 2004 12th European Signal Processing Conference.

[12]  Christophe Collewet,et al.  An approach to visual servoing based on coded light , 2006, Proceedings 2006 IEEE International Conference on Robotics and Automation, 2006. ICRA 2006..