| 4种系统矩阵的建模方法在ASD-POCS算法中的比较 |
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| 引用本文： | 邰浩伟,乔志伟,宋文琪,李欣.4种系统矩阵的建模方法在ASD-POCS算法中的比较[J].计算机应用研究,2017,34(7). |
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| 作者姓名： | 邰浩伟 乔志伟 宋文琪 李欣 |
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| 作者单位： | 中北大学 计算机与控制工程学院,山西大学 计算机与信息技术学院,中北大学 计算机与控制工程学院,中北大学 计算机与控制工程学院 |
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| 基金项目： | 海外青年学者合作研究基金 |
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| 摘 要： | 在ASD-POCS算法中,系统矩阵的建模方法对重建有一定的影响。本文设计并实现了4种系统矩阵建模方法：像素驱动,距离驱动,改进的距离驱动以及射线驱动,比较了它们的建模速度、建模精度以及在ASD-POCS算法中的收敛速度,同时比较了它们在有噪声的情况下对噪声的敏感程度。实验表明：距离驱动的建模速度最快；改进的距离驱动的建模精度最高,射线驱动在ASD-POCS算法中的收敛速度最快。
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| 关 键 词： | 像素驱动 距离驱动 射线驱动 代数迭代 ASD-POCS |
| 收稿时间： | 2016/5/13 0:00:00 |
| 修稿时间： | 2016/6/27 0:00:00 |
Comparison of four system modeling methods in ASD-POCS |
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| TAI Hao-wei,QIAO Zhi-wei,SONG Wen-qi and LI Xin.Comparison of four system modeling methods in ASD-POCS[J].Application Research of Computers,2017,34(7). |
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| Authors: | TAI Hao-wei QIAO Zhi-wei SONG Wen-qi and LI Xin |
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| Affiliation: | School of Computer and Control Engineering,North University of China,,School of Computer and Control Engineering,North University of China,School of Computer and Control Engineering,North University of China |
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| Abstract: | In ASD-POCS, there are several difference exist by using kinds of system matrix modeling methods. This paper aimed at designing and finishing these methods: pixel driven, distance driven, improved distance driven and ray driven, then compares their speed of modeling, accuracy and their convergence rate in ASD-POCS algorithm, we also compared their sensitive degree by adding noise in projection data. Experiments prove that, distance driven is faster than others in system modeling, improved distance driven is more accurate and the ray driven has the fastest convergence speed. |
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| Keywords: | pixel driven distance driven ray driven ART ASD-POCS |
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