High-precision sub-pixel interpolation in particle image velocimetry image processing |
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Authors: | Holger Nobach Nils Damaschke Cam Tropea |
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Institution: | (1) Fachgebiet Strömungslehre und Aerodynamik, Technische Universität Darmstadt, Petersenstr. 30, 64289 Darmstadt, Germany |
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Abstract: | The task of image interpolation and re-sampling for particle image velocimetry (PIV) is investigated, which is used for window shifting with sub-pixel accuracy and image or window deformation. A new interpolation scheme based on a Gaussian filter is introduced and compared with commonly used and widely accepted interpolation techniques in terms of the achievable root mean square deviation of the displacement estimates. |
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Keywords: | PIV accuracy Interpolation |
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