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Journal of Flow Visualization and Image Processing

ISSN for PRINT: 1065-3090

Institutional price:	$586.00
Issues per year:	4

Best Paper Award Selection - Editorial Board Site

2002, Volume9

85 pages

Issue price - $140.00

IMAGE CORRELATION OF PARTICLE DISTRIBUTION BY DISCRETE WAVELET TRANSFORM OF CAPACITANCE CT IMAGES

Masahiro Takei
Department of Mechanical Engineering, College of Science and Technology, Nihon University, 1-8, Kanda Surugadai, Chiyodaku, Tokyo 101-8308, Japan

Mitsuaki Ochi
Department of Mechanical Engineering, Nihon University, 8-14 Kanda Surugadai, Tokyo 101-8308, Japan

Hui Li
Department of Mechanical Engineering, Kagoshima University, Korimoto, Kagoshima, Japan

Yoshifuru Saito
Department of Electrical and Electronic Engineering, College of Technology, Hosei University, Tokyo, Japan

Kiyoshi Horii
Shirayuri College, 1-25 Midorigaoka, Chofu-shi, Tokyo 182-8525, JAPAN

ABSTRACT

Particle distributions in a cross section of a solid-air two-phase flow through a pipe are visualized by capacitance CT at a frame rate of 100 fps. The CT images are decomposed by tire discrete wavelet transform, and the image correlation between the time-series image and a standard choking image. The correlation coefficient on wavelet 0 at a choking state is close to 1.0. The level-0 wavelet transformation resolves the largest particle distribution features. This technique is expected to be useful as a basis for automatically judging blockage emergencies in airborne particle transport through pipelines.