Infotech Oulu Lecture Series
Computer vision and its applications: Circular dynamic stereoscopy & Pipe measurement robot
Lecturer: Professor Kikuhito Kawasue, University of Miyazaki, Japan
Date: Thursday, September 10, 2015
Circular dynamic stereoscopy (CDS) has special advantages for 3-D measurement because this technique uses a single CCD camera without cumbersome settings. In CDS, spiral streaks, the size of which are inversely proportional to the depth/distance of the measurement point from the CCD camera, are recorded. Therefore, three-dimensional information of moving points can be measured automatically by image processing techniques. The proposed method is suitable for 3D flow measurement.
The 3D measurement system for a sewer pipe is introduced. Two rotating parallel lasers are projected from the inside of the pipe and the circular laser streaks appeared on the inside surface of the pipe are recorded by the CCD. The measurement of the cross-section is established by analyzing the recorded streaks. Two parallel lasers are used to detect the slope of the system against the axis of the pipe. It enables us to measure the vertical cross section of the pipe regardless the slope of the system to the pipe. Experimental result shows the feasibility of the system.
Dr. Kikuhito Kawasue received the Master (1988) and the doctor degree (1995) in mechanical engineering, both from the University of Nagasaki, Japan. He had worked in Sasebo National College of Technology from 1988 to 2000 and has worked as a Professor in the University of Miyazaki since 2000. The fields of study are computer vision and robotics.
More information: Janne Heikkilä
Last updated: 27.8.2015