Title :
Three dimensional measurement of objects in liquid and estimation of refractive index of liquid by using images of water surface with a stereo vision system
Author :
Yamashita, Atsushi ; Fujii, Akira ; Kaneko, Toru
Author_Institution :
Dept. of Mech. Eng., Shizuoka Univ., Shizuoka
Abstract :
In this paper, we propose a new three-dimensional (3-D) measurement method of objects in unknown liquid with a stereo vision system. When applying vision sensors to measuring objects in liquid, light refraction is an important problem. Therefore, we estimate refractive indices of unknown liquids by using images of water surface, restore images that are free from refractive effects of the light, and measure 3-D shapes of objects in liquids in consideration of refractive effects. The effectiveness of the proposed method is shown through experiments.
Keywords :
computer vision; refractive index; stereo image processing; light refraction; liquid refractive index; stereo vision system; three dimensional measurement; three-dimensional measurement method; vision sensors; water surface images; Cameras; Distortion measurement; Image restoration; Optical attenuators; Optical refraction; Refractive index; Sea measurements; Shape measurement; Stereo vision; Working environment noise;
Conference_Titel :
Robotics and Automation, 2008. ICRA 2008. IEEE International Conference on
Conference_Location :
Pasadena, CA
Print_ISBN :
978-1-4244-1646-2
Electronic_ISBN :
1050-4729
DOI :
10.1109/ROBOT.2008.4543331
