Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
Atomization and Sprays
Facteur d'impact: 1.189 Facteur d'impact sur 5 ans: 1.596 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684

Volumes:
Volume 29, 2019 Volume 28, 2018 Volume 27, 2017 Volume 26, 2016 Volume 25, 2015 Volume 24, 2014 Volume 23, 2013 Volume 22, 2012 Volume 21, 2011 Volume 20, 2010 Volume 19, 2009 Volume 18, 2008 Volume 17, 2007 Volume 16, 2006 Volume 15, 2005 Volume 14, 2004 Volume 13, 2003 Volume 12, 2002 Volume 11, 2001 Volume 10, 2000 Volume 9, 1999 Volume 8, 1998 Volume 7, 1997 Volume 6, 1996 Volume 5, 1995 Volume 4, 1994 Volume 3, 1993 Volume 2, 1992 Volume 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.v11.i4.20
pages 317-333

DETERMINATION OF IN-FOCUS CRITERIA AND DEPTH OF FIELD IN IMAGE PROCESSING OF SPRAY PARTICLES

Kwang Uoong Koh
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Taejon, Korea
Joo Youn Kim
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-Dong, Yusong-Gu, Taejon, 305-701 Korea
Sang Yong Lee
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291, Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea

RÉSUMÉ

In the present study, in-focus criteria and depth of field in image processing of spray particles within the size range 10–300 mm have been examined. As the indices of the in-focus criteria, the critical normalized value of contrast (VCcritical) proposed earlier was carefully reviewed, and the concept of the critical gradient indicator (GIcritical) was newly introduced. The criterion with VCcritical) was confirmed to be appropriate only for the small particle range (Ј 30 mm). In contrast, the criterion with GIcritical was determined to be appropriate for large particles і 30 mm). The dependence of the depth of field on the values of VCcritical and GIcritical was examined. The depth of field decreases with higher values of VCcritical and GIcritical , and varies linearly with particle size in both VC- and GI-applicable ranges. To keep the normalized standard deviation of the measurements below 0.1 while maintaining the continuity of the depth-of-field variation at the borderline of 30 mm, the adjustable constants C and DGI for VCcritical and GIcritical should be set to 0.85 and 0.22, respectively, for the present optical setup.


Articles with similar content:

Effects of Esophageal Stimulation in Healthy Subjects
Critical Reviews™ in Biomedical Engineering, Vol.28, 2000, issue 1&2
Adrian R. M. Upton, Debbie Fitzpatrick, Stephan Hollerbach, Absar Bajwa, Ernest L. Fallen, Andrew May, Gervais Tougas, Glen Shine
TURBULENCE MODIFICATION BY SOLID PARTICLES IN UPWARD GRID TURBULENCE OF WATER
TSFP DIGITAL LIBRARY ONLINE, Vol.3, 2003, issue
Koichi Nishino, Kahoru Torii, Hideo Matsushita
A method of phycocyanin production from Spirulina platensis (Nordst.) Geitl.
International Journal on Algae, Vol.3, 2001, issue 1
V. F. Rudik, V.P. Bul'maga
DROP SIZING AND DEPTH-OF-FIELD CORRECTION IN TV IMAGING
Atomization and Sprays, Vol.4, 1994, issue 1
Ki Seong Kim, Sung-Soo Kim
SPECTROSCOPIC STUDY OF A THERMAL PLASMA JET GENERATED BY A HYBRID WATER-ARGON STABILIZED DC ARC TORCH
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.7, 2003, issue 1
V. Sember