Jiang Tingyong, Zhou Heng, Ning Hui, et al. Study of horn antenna loaded with epsilon-near-zero metamaterial[J]. High Power Laser and Particle Beams, 2017, 29: 023001. doi: 10.11884/HPLPB201729.160458
Citation:
Jing Yuefeng, Guan Yonghong, Zhang Xiaolin. Constrained optimization reconstruction for flash radiographic image[J]. High Power Laser and Particle Beams, 2016, 28: 094002. doi: 10.11884/HPLPB201628.150498
Jiang Tingyong, Zhou Heng, Ning Hui, et al. Study of horn antenna loaded with epsilon-near-zero metamaterial[J]. High Power Laser and Particle Beams, 2017, 29: 023001. doi: 10.11884/HPLPB201729.160458
Citation:
Jing Yuefeng, Guan Yonghong, Zhang Xiaolin. Constrained optimization reconstruction for flash radiographic image[J]. High Power Laser and Particle Beams, 2016, 28: 094002. doi: 10.11884/HPLPB201628.150498
Blurring and noise are serious problems in hydro-test with high-energy X-ray radiography and make it difficult to reconstruct density distributions from radiographic images. A constrained optimization reconstruction method to decrease the blurring and noise impact is proposed. In this method, the parallel-beam X-ray projections are modeled by inserting a blurring matrix in. The optimization reconstruction problem is minimized by steepest descent method, and a preconditioned matrix has been adopted to improve the reconstruction efficiency. We focus on the topographic reconstruction of piecewise smooth objects involving sharp edges, so the algorithm is based on generalized-variation-minimization constraints, piecewise constraints and the non-negative density values constraints. We applied the reconstruction algorithm to reconstruct computer-synthesized images of the French Test Object (FTO) and a hydro-test object image. The results show that our method is beneficial to improve the quality of reconstructed image with better performance of noise smoothing and better edge preserving as well.
Jiang Tingyong, Zhou Heng, Ning Hui, et al. Study of horn antenna loaded with epsilon-near-zero metamaterial[J]. High Power Laser and Particle Beams, 2017, 29: 023001. doi: 10.11884/HPLPB201729.160458
Jiang Tingyong, Zhou Heng, Ning Hui, et al. Study of horn antenna loaded with epsilon-near-zero metamaterial[J]. High Power Laser and Particle Beams, 2017, 29: 023001. doi: 10.11884/HPLPB201729.160458