scholarly journals Three-dimensional velocity measurement system for turbulent flows based on digital image processing.

1988 ◽  
Vol 8 (30) ◽  
pp. 277-282
Author(s):  
Koichi NISHINO ◽  
Nobuhide KASAGI ◽  
Masaru HIRATA ◽  
Yutaka SATA
Keyword(s):  
Image Processing ◽  
Turbulent Flows ◽  
Digital Image Processing ◽  
Measurement System ◽  
Digital Image ◽  
Velocity Measurement ◽  
Three Dimensional

Three-Dimensional Particle Tracking Velocimetry Based on Automated Digital Image Processing

1989 ◽  
Vol 111 (4) ◽  
pp. 384-391 ◽  
Author(s):  
Koichi Nishino ◽  
Nobuhide Kasagi ◽  
Masaru Hirata
Keyword(s):  
Image Processing ◽  
Turbulent Flows ◽  
Digital Image Processing ◽  
Digital Image ◽  
Particle Tracking ◽  
Three Dimensional ◽  
Image Processing Technique ◽  
Water Tank ◽  
Decaying Turbulence ◽  
Laser Disk

A three-dimensional particle tracking velocimeter for measuring an instantaneous distribution of all the three velocity components in a liquid flow is developed using an automated digital image processing technique. The measurement system consists of three TV cameras, a digital image processor, a laser disk recorder and a 16-bit microcomputer. Motions of neutrally buoyant tracer particles introduced into the flow field are observed by the cameras, and the three-dimensional displacement of each particle is calculated from consecutive TV frames recorded on the laser disk. Instantaneous velocity profiles in an unsteady laminar Couette flow between two concentric cylinders are measured. The results are in good agreement with predictions within the measurement uncertainties evaluated systematically. Furthermore, the measurement of a decaying turbulence in a stirred water tank demonstrates that the present technique is applicable to turbulent flows.

Three-dimensional examination of bone structure around hydroxyapatite implants using digital image processing

1997 ◽  
Vol 34 (2) ◽  
pp. 177-182 ◽  
Author(s):  
Rudi Wigianto ◽  
Tetsuo Ichikawa ◽  
Hideo Kanitani ◽  
Masanobu Horiuchi ◽  
Naoyuki Matsumoto ◽  
...  
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Bone Structure ◽  
Three Dimensional
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