Single-pixel correlation applied to background-oriented schlieren measurement

Hikaru Sugisaki; Chungil Lee; Yuta Ozawa; Kumi Nakai; Yuji Saito; Taku Nonomura; Keisuke Asai; Yu Matsuda

doi:10.1007/s00348-021-03373-7

Single-pixel correlation applied to background-oriented schlieren measurement

Hikaru Sugisaki^*, Chungil Lee, Yuta Ozawa, Kumi Nakai, Yuji Saito, Taku Nonomura, Keisuke Asai, Yu Matsuda

^*Corresponding author for this work

School of Creative Science and Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Abstract: A high-spatial resolution measurement system by the background-oriented schlieren (BOS) method is proposed in this note. The single-pixel correlation method is applied for the image pairs obtained by the BOS method, and the displacement is calculated. The backgrounds are projected by a high-speed projector and changed at 900 Hz for calculation of the pixel-to-pixel correlation. This method is compared with the conventional method which utilizes the constant background and calculates the displacement by the conventional spatial correlation. The results show that the proposed system can obtain the displacement distribution in the single-pixel resolution which is eight times as high resolution as the conventional one. Graphical abstract: [Figure not available: see fulltext.].

Original language	English
Article number	36
Journal	Experiments in Fluids
Volume	63
Issue number	1
DOIs	https://doi.org/10.1007/s00348-021-03373-7
Publication status	Published - 2022 Jan

ASJC Scopus subject areas

Computational Mechanics
Mechanics of Materials
Physics and Astronomy(all)
Fluid Flow and Transfer Processes

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10.1007/s00348-021-03373-7

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title = "Single-pixel correlation applied to background-oriented schlieren measurement",

abstract = "Abstract: A high-spatial resolution measurement system by the background-oriented schlieren (BOS) method is proposed in this note. The single-pixel correlation method is applied for the image pairs obtained by the BOS method, and the displacement is calculated. The backgrounds are projected by a high-speed projector and changed at 900 Hz for calculation of the pixel-to-pixel correlation. This method is compared with the conventional method which utilizes the constant background and calculates the displacement by the conventional spatial correlation. The results show that the proposed system can obtain the displacement distribution in the single-pixel resolution which is eight times as high resolution as the conventional one. Graphical abstract: [Figure not available: see fulltext.].",

author = "Hikaru Sugisaki and Chungil Lee and Yuta Ozawa and Kumi Nakai and Yuji Saito and Taku Nonomura and Keisuke Asai and Yu Matsuda",

note = "Funding Information: The present study was supported by the Japan Society for the Promotion of Science (JSPS), KAKENHI Grant No. 20H00278, and by the Japan Science and Technology Agency (JST), PREST Grant No. JPMJPR187A and FOREST Grant No. JPMJFR202C. Y. Ozawa was supported by JSPS KAKENHI Grant No. 19H00800. K. Nakai was supported by JST CREST Grand No. JPMJCR1763. C. Lee was supported by the Japan Society for the Promotion of Science (JSPS), KAKENHI Grants No. JP21J20744. Publisher Copyright: {\textcopyright} 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.",

year = "2022",

month = jan,

doi = "10.1007/s00348-021-03373-7",

language = "English",

volume = "63",

journal = "Experiments in Fluids",

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TY - JOUR

T1 - Single-pixel correlation applied to background-oriented schlieren measurement

AU - Sugisaki, Hikaru

AU - Lee, Chungil

AU - Ozawa, Yuta

AU - Nakai, Kumi

AU - Saito, Yuji

AU - Nonomura, Taku

AU - Asai, Keisuke

AU - Matsuda, Yu

N1 - Funding Information: The present study was supported by the Japan Society for the Promotion of Science (JSPS), KAKENHI Grant No. 20H00278, and by the Japan Science and Technology Agency (JST), PREST Grant No. JPMJPR187A and FOREST Grant No. JPMJFR202C. Y. Ozawa was supported by JSPS KAKENHI Grant No. 19H00800. K. Nakai was supported by JST CREST Grand No. JPMJCR1763. C. Lee was supported by the Japan Society for the Promotion of Science (JSPS), KAKENHI Grants No. JP21J20744. Publisher Copyright: © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

PY - 2022/1

Y1 - 2022/1

N2 - Abstract: A high-spatial resolution measurement system by the background-oriented schlieren (BOS) method is proposed in this note. The single-pixel correlation method is applied for the image pairs obtained by the BOS method, and the displacement is calculated. The backgrounds are projected by a high-speed projector and changed at 900 Hz for calculation of the pixel-to-pixel correlation. This method is compared with the conventional method which utilizes the constant background and calculates the displacement by the conventional spatial correlation. The results show that the proposed system can obtain the displacement distribution in the single-pixel resolution which is eight times as high resolution as the conventional one. Graphical abstract: [Figure not available: see fulltext.].

AB - Abstract: A high-spatial resolution measurement system by the background-oriented schlieren (BOS) method is proposed in this note. The single-pixel correlation method is applied for the image pairs obtained by the BOS method, and the displacement is calculated. The backgrounds are projected by a high-speed projector and changed at 900 Hz for calculation of the pixel-to-pixel correlation. This method is compared with the conventional method which utilizes the constant background and calculates the displacement by the conventional spatial correlation. The results show that the proposed system can obtain the displacement distribution in the single-pixel resolution which is eight times as high resolution as the conventional one. Graphical abstract: [Figure not available: see fulltext.].

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Single-pixel correlation applied to background-oriented schlieren measurement

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