| 含系统模糊的闪光照相正向成像技术研究及应用 |
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| 引用本文： | 刘进,张小琳,景越峰,刘军,张绚.含系统模糊的闪光照相正向成像技术研究及应用[J].强激光与粒子束,2015,27(4):044003-185. |
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| 作者姓名： | 刘进 张小琳 景越峰 刘军 张绚 |
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| 作者单位： | 1.中国工程物理研究院 流体物理研究所, 四川 绵阳 621 900 |
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| 基金项目： | 中国工程物理研究院科学技术发展基金项目(2012A0202006,2013B0202021,2014B0403056);国家自然科学青年基金项目(11304295) |
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| 摘 要： | <正>向成像技术是正向计算与反演相结合的密度重建技术的基础。为了正确获取闪光照相面光源下复杂客体的正向计算数值图像,提出了面光源点源化的思想,并用窗口化的探测系统模糊、径迹法等技术得到了更加准确的、含系统模糊的正向投影矩阵以及方程。利用含系统模糊的正向投影方程计算实验客体的正向投影,获得了与实验结果一致的边界信息。含系统模糊的正向投影方程和逆问题求解的约束共轭梯度法合成了整体密度重建方法。整体密度重建方法应用于FTO客体的模拟图像和实验图像,都能够将模糊控制在1~2个像素。
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| 关 键 词： | 闪光照相 正向成像 系统模糊 径迹法 |
| 收稿时间： | 2014-10-12 |
Research and application of forward imaging technology with systemic blur |
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| Liu Jin;Zhang Xiaolin;Jing Yuefeng;Liu Jun;Zhang Xuan.Research and application of forward imaging technology with systemic blur[J].High Power Laser and Particle Beams,2015,27(4):044003-185. |
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| Authors: | Liu Jin;Zhang Xiaolin;Jing Yuefeng;Liu Jun;Zhang Xuan |
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| Affiliation: | 1.Institute of Fluid Physics,CAEP,P.O.Box 919-105,Mianyang 621900,China |
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| Abstract: | Forward imaging technique is the base of the combined method for density reconstruction with forward calculation and inverse problem solution. This paper proposes the idea of girding the areal source as many point sources. Using the blurring window as the affecting factor of the detector blur, the projecting matrix from any point source to any detector pixel with X-ray trace technique is obtained, the projection equation for the radiographic system with areal source blur and detector blur is introduced. The projection equation is used to gain the same deviation information about the object edge as the experimental image. The forward projection equation is combined with the constrained conjugate gradient method to form a full procedure of density reconstruction, which is applied on a simulated image of French Test Object and an experimental image. The results show that using the projection equation, the affecting range of the blur is decreased and can be controlled in one or two pixels. |
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