ISSN 1004-4140
CN 11-3017/P

由相叠低分辨投影数据重建高分辨图像

郭明焕, 张朋

郭明焕, 张朋. 由相叠低分辨投影数据重建高分辨图像[J]. CT理论与应用研究, 2002, 11(2): 12-18.
引用本文: 郭明焕, 张朋. 由相叠低分辨投影数据重建高分辨图像[J]. CT理论与应用研究, 2002, 11(2): 12-18.
GUO Ming-huan, ZHANG Peng. Reconstructing High Resolution Image from Overlapped Low Resolution Projection Data[J]. CT Theory and Applications, 2002, 11(2): 12-18.
Citation: GUO Ming-huan, ZHANG Peng. Reconstructing High Resolution Image from Overlapped Low Resolution Projection Data[J]. CT Theory and Applications, 2002, 11(2): 12-18.

由相叠低分辨投影数据重建高分辨图像

基金项目: 

教育部高等学校骨干教师资助计划资助

国家自然科学基金(No.69931010)

详细信息
    作者简介:

    郭明焕,男,1977-08月出生,陕西横山县人,于1999年西北大学数学系本科毕业,获理学学士学位;现为西北大学与北京信息工程学院联合培养的硕士研究生,专业方向是小波分析与图像信号处理;张朋,男,1957-03月出生,博士,副研究员,中国体视学会理事,中国体视学会CT理论与应用专业委员会副主任委员,北京信息工程学院科研处长,兼应用数学研究室主任

  • 中图分类号: TP391.41

Reconstructing High Resolution Image from Overlapped Low Resolution Projection Data

  • 摘要: 本文提出了由平行的相叠低分辨投影数据重建高分辨图像的两个新算法,即虚拟探测器法和直接重建法,并给出和分析了数值模拟结果。
    Abstract: The authors present two novel algorithms of reconstructing high resolution image from overlapped parallel projection data with low resolution. One is called virtual detector algorithm, and the other is direct reconstruction algorithm. Both of the algorithms are developed from the interpolative algebraic reconstruction technique (IART) contributed by E.J. Mazur and R. Gordon. The main assumption in the paper is that the linear array of detectors can shift along the line of the array with a step which is less than the width of the detectors, and the overlapped projection data can be collected by overlapped sampling. The simulation results show that high resolution images can be reconstructed by means of both algorithms from the overlapped projection data. Moreover, the quality of the image reconstructed by the virtual detector algorithm from the overlapped low resolution projection data is almost as good as that of the image reconstructed directly from the high projection data. Although the resolution of the image reconstructed by direct reconstruction algorithm is slight lower than that of the image reconstructed by the virtual detector algorithm, the direct reconstruction algorithm adapts to any kind of overlapped projection data.
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出版历程
  • 收稿日期:  2002-04-15
  • 网络出版日期:  2022-12-16

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