On image pre-processing for PIV of single- and two-phase flows over reflecting objects

被引：35
|
作者：
Deen, Niels G. [1 ]
Willems, Paul [1 ]
Annaland, Martin van Sint [1 ]
Kuipers, J. A. M. [1 ]
Lammertink, Rob G. H. [1 ]
Kemperman, Antoine J. B. [1 ]
Wessling, Matthias [1 ]
van der Meer, Walter G. J. [1 ]
机构：
[1] Univ Twente, Fac Sci & Technol, IMPACT, NL-7500 AE Enschede, Netherlands
来源：
EXPERIMENTS IN FLUIDS | 2010年 / 49卷 / 02期
关键词：
Image processing;
D O I：
10.1007/s00348-010-0827-y
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A novel image pre-processing scheme for PIV of single- and two-phase flows over reflecting objects which does not require the use of additional hardware is discussed. The approach for single-phase flow consists of image normalization and intensity stretching followed by background subtraction. For two-phase flow, an additional masking step is added after the background subtraction. The effectiveness of the pre-processing scheme is shown for two examples: PIV of single-phase flow in spacer-filled channels and two-phase flow in these channels. The pre-processing scheme increased the displacement peak detectability significantly and produced high quality vector fields, without the use of additional hardware.
引用
收藏
页码：525 / 530
页数：6
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