| Droplet Image Super Resolution Based on Sparse Representation and Kernel Regression | |
| Zou, ZZ; Luo, XH; Yu, Q; Yu, Q (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China. | |
| 2018-05-01 | |
| Source Publication | MICROGRAVITY SCIENCE AND TECHNOLOGY
 |
| ISSN | 0938-0108 |
| Volume | 30Issue:3Pages:321-329 |
| Abstract | Microgravity and containerless conditions, which are produced via electrostatic levitation combined with a drop tube, are important when studying the intrinsic properties of new metastable materials. Generally, temperature and image sensors can be used to measure the changes of sample temperature, morphology and volume. Then, the specific heat, surface tension, viscosity changes and sample density can be obtained. Considering that the falling speed of the material sample droplet is approximately 31.3 m/s when it reaches the bottom of a 50-meter-high drop tube, a high-speed camera with a collection rate of up to 10(6) frames/s is required to image the falling droplet. However, at the high-speed mode, very few pixels, approximately 48-120, will be obtained in each exposure time, which results in low image quality. Super-resolution image reconstruction is an algorithm that provides finer details than the sampling grid of a given imaging device by increasing the number of pixels per unit area in the image. In this work, we demonstrate the application of single image-resolution reconstruction in the microgravity and electrostatic levitation for the first time. Here, using the image super-resolution method based on sparse representation, a low-resolution droplet image can be reconstructed. Employed Yang's related dictionary model, high- and low-resolution image patches were combined with dictionary training, and high- and low-resolution-related dictionaries were obtained. The online double-sparse dictionary training algorithm was used in the study of related dictionaries and overcome the shortcomings of the traditional training algorithm with small image patch. During the stage of image reconstruction, the algorithm of kernel regression is added, which effectively overcomes the shortcomings of the Yang image's edge blurs.; Microgravity and containerless conditions, which are produced via electrostatic levitation combined with a drop tube, are important when studying the intrinsic properties of new metastable materials. Generally, temperature and image sensors can be used to measure the changes of sample temperature, morphology and volume. Then, the specific heat, surface tension, viscosity changes and sample density can be obtained. Considering that the falling speed of the material sample droplet is approximately 31.3 m/s when it reaches the bottom of a 50-meter-high drop tube, a high-speed camera with a collection rate of up to 10(6) frames/s is required to image the falling droplet. However, at the high-speed mode, very few pixels, approximately 48-120, will be obtained in each exposure time, which results in low image quality. Super-resolution image reconstruction is an algorithm that provides finer details than the sampling grid of a given imaging device by increasing the number of pixels per unit area in the image. In this work, we demonstrate the application of single image-resolution reconstruction in the microgravity and electrostatic levitation for the first time. Here, using the image super-resolution method based on sparse representation, a low-resolution droplet image can be reconstructed. Employed Yang's related dictionary model, high- and low-resolution image patches were combined with dictionary training, and high- and low-resolution-related dictionaries were obtained. The online double-sparse dictionary training algorithm was used in the study of related dictionaries and overcome the shortcomings of the traditional training algorithm with small image patch. During the stage of image reconstruction, the algorithm of kernel regression is added, which effectively overcomes the shortcomings of the Yang image's edge blurs. |
| description.department | [zou, zhenzhen ; yu, qiang] chinese acad sci, natl space sci ctr, beijing 100190, peoples r china ; [zou, zhenzhen] univ chinese acad sci, sch comp & control engn, 19 a yuquan rd, beijing 100049, peoples r china ; [luo, xinghong] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china |
| Keyword | Superresolution Microgravity Alloy |
| Subject Area | Engineering, Aerospace ; Thermodynamics ; Mechanics |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000431998800016 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/79318 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yu, Q (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Zou, ZZ,Luo, XH,Yu, Q,et al. Droplet Image Super Resolution Based on Sparse Representation and Kernel Regression[J]. MICROGRAVITY SCIENCE AND TECHNOLOGY,2018,30(3):321-329. |
| APA | Zou, ZZ,Luo, XH,Yu, Q,&Yu, Q .(2018).Droplet Image Super Resolution Based on Sparse Representation and Kernel Regression.MICROGRAVITY SCIENCE AND TECHNOLOGY,30(3),321-329. |
| MLA | Zou, ZZ,et al."Droplet Image Super Resolution Based on Sparse Representation and Kernel Regression".MICROGRAVITY SCIENCE AND TECHNOLOGY 30.3(2018):321-329. |
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