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Improvement of Spatial Resolution of W-BOS Analysis Images in Supersonic Flow Using Super-Resolution Technique |
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| รหัสดีโอไอ | |
| Creator | 1. K. Maeda 2. H. Fukuoka 3. A. Suda 4. Y. Taniguchi 5. K. Hiro 6. S. Nakamura |
| Title | Improvement of Spatial Resolution of W-BOS Analysis Images in Supersonic Flow Using Super-Resolution Technique |
| Publisher | Thai Society of Mechanical Engineers (TSME) |
| Publication Year | 2568 |
| Journal Title | Journal of Research and Applications in Mechanical Engineering (JRAME) |
| Journal Vol. | 13 |
| Journal No. | 3 |
| Page no. | JRAME-25-13-046 (p.1-8) |
| Keyword | Supersonic Flow, Shock Wave, Background Oriented Schlieren, Wavelet Transformation, Super-Resolution |
| URL Website | https://ph01.tci-thaijo.org/index.php/jrame/index |
| Website title | Journal of Research and Applications in Mechanical Engineering (JRAME) |
| ISSN | 2229-2152 |
| Abstract | The Wavelet-based Background Oriented Schlieren (W-BOS) method quantitatively evaluates the density gradient. This study achieves high spatial and temporal resolution in the density gradient images by integrating a super-resolution technique and the W-BOS method. This experiment uses a jet and a jet-induced shock wave emitted from an open small-volume shock tube as visualization targets. We investigated the effect of super-resolution model types and restoration magnification ratios. Three established super-resolution models are used to restore. The magnifications of 2, 4 and 8 are evaluated. At magnifications 2 and 4, the processed images were close to the original, with the shock wave and the jet well captured in all super-resolution models. In the restoration of magnification 4 using the EDSR model, a measurement error was about 15% smaller than a Bicubic interpolation. These results suggest that the W-BOS method is capable of super-resolution restoration of high-resolution images with magnifications up to 4. |
