High-accuracy measurement of depth-displacement using a focus function and its cross- correlation in holographic PTV
SCIE
SCOPUS
- Title
- High-accuracy measurement of depth-displacement using a focus function and its cross- correlation in holographic PTV
- Authors
- Seo, KW; Lee, SJ
- Date Issued
- 2014-06-30
- Publisher
- OPTICAL SOC AMER
- Abstract
- We propose a method using a focus function and its cross-correlation to measure depth-position and precise depth-displacement. The focus function provides acceptable results in the determination of depth-position of a transparent particle, an opaque particle, and a red blood cell. However, positional errors and a short time interval can cause unreliable results in identifying depth-displacement (Delta z) and depth-directional velocity in digital holographic particle tracking velocimetry (DHPTV). To minimize the errors in Delta z, we propose a method that directly obtains depth displacement from the cross-correlation of focus values between consecutive holograms. The feasibility of this method is demonstrated by quantitatively visualizing a 3D flow using HPTV. (C)2014 Optical Society of America
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14035
- DOI
- 10.1364/OE.22.015542
- ISSN
- 1094-4087
- Article Type
- Article
- Citation
- OPTICS EXPRESS, vol. 22, no. 13, page. 15542 - 15553, 2014-06-30
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