Title :
Range imaging based on moving pattern light and spatio-temporal matched filter
Author_Institution :
Nara Inst. of Sci. & Technol., Japan
Abstract :
Aa new structured light projection method for measuring 3D and range objects is proposed. The method projects a moving structured light pattern modulated by a time-compression signal, then the objects are captured as a dynamic and spatio-temporal image by a camera. By applying a matched filter to the spatio-temporal image, the ideal slit light is realized even using an actual light projector. According to the extracted slit light and triangulation principle, 3D geometric information of the objects scene are obtained more accurately. By using separable signals which have no correlation with each other, the method is able to project multiple light patterns at different positions simultaneously. It solves the occlusion problem due to a single projector. Some experimental results show its advantages
Keywords :
CCD image sensors; data compression; distance measurement; filtering theory; image processing; matched filters; optical information processing; optical modulation; optical projectors; 3D geometric information; 3D object measurement; CCD camera; experimental results; light projector; moving pattern light; occlusion problem solution; range finding; range imaging; range objects; signal compression theory; signal separation; slit light; spatiotemporal image; spatiotemporal matched filter; structured light pattern modulation; structured light projection method; time-compression signal; triangulation principle; Cameras; Electronic mail; Image processing; Image sequences; Matched filters; Optical imaging; Optical modulation; Pixel; Signal processing; Time measurement;
Conference_Titel :
Image Processing, 1996. Proceedings., International Conference on
Conference_Location :
Lausanne
Print_ISBN :
0-7803-3259-8
DOI :
10.1109/ICIP.1996.559426
