Title :
3-D data acquisition using the ratio of two intensity images
Author :
Silva, Jorge A. ; Campilho, Aurélio J C ; Santos, J. C Marques dos
Author_Institution :
Dept. of Electr. & Comput. Eng., Porto Univ., Portugal
Abstract :
Some important aspects of the implementation and calibration of a 3-D data acquisition system based on the ratio of two intensity images are described. These two images are obtained by illuminating the scene with a projector whose light is filtered, successively, by a graded and a constant neutral density filter. Calibration steps, involving the determination of camera and light projector geometric parameters and ratio calibration data, are analyzed. A new ratio calibration procedure is proposed. Results of two depth calculation methods are presented, and system accuracy is evaluated for several test scenes
Keywords :
calibration; picture processing; 3-D data acquisition system; calibration; camera; constant neutral density filter; depth calculation methods; geometric parameters; graded filter; image intensity ratio; light projector; system accuracy; test scenes; Calibration; Cameras; Coordinate measuring machines; Data acquisition; Data analysis; Data engineering; Filters; Layout; Optical distortion; System testing;
Conference_Titel :
Electrotechnical Conference, 1991. Proceedings., 6th Mediterranean
Conference_Location :
LJubljana
Print_ISBN :
0-87942-655-1
DOI :
10.1109/MELCON.1991.162067
