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Atomization and Sprays
Facteur d'impact: 1.262 Facteur d'impact sur 5 ans: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

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

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v1.i4.30
pages 389-400

GRAY LEVEL FACTORS USED IN IMAGE PROCESSING OF TWO-DIMENSIONAL DROP IMAGES

Sang Yong Lee
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291, Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
Byung Suh Park
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-Dong, Yusong-Gu, Taejon, 305-701, Korea
In Goo Kim
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-Dong, Yusung-Gu, Taejon 305-701, Korea

RÉSUMÉ

This paper describes how the threshold gray level should be chosen for accurate measurements of polydispersed spray drops in using image sensing or image processing techniques. For this purpose, reference pictures were prepared to simulate the photographs of spray drops with various sizes based on the Rosin-Rammler and upper-limit distribution functions. Graphical correlations between the optimum threshold level and the distribution parameters are proposed, and a guideline for using those results is provided.


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