| 基于脊波变换的三维工业CT图像空间距离测量 |
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| 引用本文： | 刘勇,曾理,邹晓兵.基于脊波变换的三维工业CT图像空间距离测量[J].南昌航空工业学院学报,2007,21(3):66-70. |
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| 作者姓名： | 刘勇 曾理 邹晓兵 |
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| 作者单位： | 重庆大学ICT研究中心，重庆大学ICT研究中心，重庆大学ICT研究中心 重庆400044，重庆大学数理学院，重庆400044，重庆400044，重庆大学数理学院，重庆400044，重庆400044 |
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| 基金项目： | 国家自然科学基金(60672098) |
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| 摘 要： | 工业CT是一种应用广泛的射线无损检测技术,工业CT三维图像的测量是其中重要的组成部分。本文利用脊波变换,初步实现了三维工业CT图像的空间距离测量。首先对三维图像进行三维Radon变换,得到投影值构成的二维图像(称为投影值图像)。然后在待测量位置画一条直线,对直线上的灰度值进行小波变换。根据变换后的小波系数确定投影值图像的边缘位置,从而求出三维图像内两点的距离。仿真实验表明:采用本文的脊波方法测量三维工业CT图像的两点空间距离可达到较高精度。
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| 关 键 词： | 工业CT 三维图像 脊波变换 投影 空间距离测量 |
| 文章编号： | 1001-4926（2007）03-0066-05 |
| 收稿时间： | 2007-08-22 |
| 修稿时间： | 2007年8月22日 |
Space distance measurement of industrial computed tomography based on ridgelet transform |
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| LIU Yong,ZENG Li,ZOU Xiao-bin.Space distance measurement of industrial computed tomography based on ridgelet transform[J].Journal of Nanchang Institute of Aeronautical Technology(Natural Science Edition),2007,21(3):66-70. |
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| Authors: | LIU Yong ZENG Li ZOU Xiao-bin |
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| Abstract: | Industrial computed tomography is widely used in ray non-destructive testing technology.The measurement of 3D image is an important component of industrial computed tomography.In the paper,ridgelet transform is used in 3D image measurement of industrial computed tomography.Radon transform is used on 3D image at first.Then two-dimensional image(called projection image) is gotten by the projections.A straight line was drawn in the measured position.Wavelet transform is used in the pixels which are on the straight line.Then the two edge positions on the line can be judged by the wavelet coefficients and the distance between two points is obtained.The simulation results show that the accuracy of using the ridgelet method to measure the distance between two points in space is high. |
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| Keywords: | industrial computed tomography 3D image ridgelet transform projection space distance measurement |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
