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ASTM Selected Technical Papers
Liquid Particle Size Measurement Techniques: 2nd Volume
By
ED Hirleman
ED Hirleman
1
Arizona State University
,
Tempe, AZ
;
symposium chairman and editor
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WD Bachalo
WD Bachalo
editor
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PG Felton
PG Felton
editor
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ISBN-10:
0-8031-1459-1
ISBN:
978-0-8031-1459-3
No. of Pages:
266
Publisher:
ASTM International
Publication date:
1990

An image-processing technique is presented for analyzing nonspherical particles in backlighted images of sprays. Focus discrimination is designed to accommodate not only the nonspherical shapes but also nonideal lighting conditions such as poor contrast and non-uniform shading. Additionally, in most cases the method is capable of recognizing when light transmitted or reflected through transparent particles makes them falsely appear as if they had holes in them. The algorithm is a postprocessor which can operate on stored digital image data either independently or in conjunction with other processing methods. Example applications are included.

1.
Markham
,
D. L.
, “
Shadowgraphic Video and Laser Diffraction Techniques for Assessing Drop Size Distributions in Fuel Nozzle Sprays
,” in
Proceedings
, Second International Conference on Liquid Atomization and Spray Systems,
Madison, WI
,
1982
, pp. 293–302.
2.
Oberdier
,
L. M.
, “
An Instrumentation System to Automate the Analysis of Fuel-Spray Images Using Computer Vision
,” in
Liquid Particle Size Measurement Techniques
, ASTM STP 848,
Tishkoff
J. M.
,
Ingebo
R. D.
, and
Kennedy
J. B.
, Eds.,
American Society for Testing and Materials
,
Philadelphia
,
1984
, pp. 123–126.
3.
Bertollini
,
G. P.
,
Oberdier
,
L. M.
, and
Lee
,
Y. H.
, “
Image Processing System to Analyze Droplet Distributions in Sprays
,”
Optical Engineering
 0091-3286, Vol.
24
, No.
3
,
1985
, pp. 464–469.
4.
Tishkoff
,
J. M.
, “
Measurements of Particle Size and Velocity in a Fuel Spray
,” in
Proceedings
, Second International Conference on Liquid Atomization and Spray Systems,
Madison, WI
,
1982
, pp. 245–252.
5.
Weiss
,
B. A.
,
Derov
,
P.
,
DeBiase
,
D.
, and
Simmons
,
H. C.
, “
Fluid Particle Sizing Using a Fully Automated Optical Imaging System
,”
Optical Engineering
 0091-3286, Vol.
23
, No.
5
,
1984
, pp. 561–566.
6.
Lo
,
R. S.
,
Matysiewicz
,
E. J.
, and
Hotham
,
G. A.
, “
Fuel Injector Atomization Measurement Using Laser Imaging Techniques
,” SAE Paper 851673,
Society of Automotive Engineers
,
1985
.
7.
Yoshihara
,
K.
,
Abe
,
T.
, and
Goto
,
Y.
, “
Statistical Analysis of Diesel Particle Size and Shape by Digital Picture Processing Method
,”
Journal of the Society of Automotive Engineers Review
,
07
1984
, pp. 9–17.
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