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轴对称图象
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  axile symmetry image
     FAST COMPUTATION REFORMED ALGORITHM OF 2-D AXILE SYMMETRY IMAGE HU′S MOMENT INVARIANTS
     二维轴对称图象高阶胡氏不变矩快速算法的改进
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  相似匹配句对
     On Image Matching Technology
     图象匹配技术
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     On the Dielectric Image Wang Lixiang
     论电介质图象
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     DESIGN OF AXI-SYMMETRIC CONTRACTION
     轴对称收缩段设计
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     Finite-Element Method for Axial Symmetry Problems
     轴对称问题的有限单元法
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     FAST COMPUTATION REFORMED ALGORITHM OF 2-D AXILE SYMMETRY IMAGE HU′S MOMENT INVARIANTS
     二维轴对称图象高阶胡氏不变矩快速算法的改进
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The imaginary symmetric reconstruction algorithm for limited-view tomography proposed in this paper is suitable to the situation in which the limited-view is π/2. We suppose that these objects to be reconstructed are symmetrical about x axis, and then we use this supposition to make up the projection data to full extent and the method of convolution inverse projection to reconstruct the images which are symmetrical about x axis. In the same way we can reconstruct images which are symmetrical about y axis. From...

The imaginary symmetric reconstruction algorithm for limited-view tomography proposed in this paper is suitable to the situation in which the limited-view is π/2. We suppose that these objects to be reconstructed are symmetrical about x axis, and then we use this supposition to make up the projection data to full extent and the method of convolution inverse projection to reconstruct the images which are symmetrical about x axis. In the same way we can reconstruct images which are symmetrical about y axis. From these reconstructed images we can obtain real images of a object to be reconstructed.

本文提出的有限角图象重建的虚拟对称重建算法,此算法适用于有限角为π/2的情形,假设待建物体关于X轴对称,利用此假设补全投影数据,再用卷积反投影法重建出关于X轴对称的图象.同理可重建出关于Y轴对称的图象.根据这些重建图可推断待建物体的实际图象.

A practical project is presented to reform the fast calculation algorithm of 2 D symmetry object image moments in use.The reform is preformed by proved two proposition.One proposition is that the centroid of 2 D symmetry object image is on symmetry axis.By proved this proposition,the fast calculation algorithm of 2 D symmetry object image moments can be used in central moments calculation.Another is that two images have translation relation,which results from two rotations of the same object image in a same...

A practical project is presented to reform the fast calculation algorithm of 2 D symmetry object image moments in use.The reform is preformed by proved two proposition.One proposition is that the centroid of 2 D symmetry object image is on symmetry axis.By proved this proposition,the fast calculation algorithm of 2 D symmetry object image moments can be used in central moments calculation.Another is that two images have translation relation,which results from two rotations of the same object image in a same degree but different centers.Based on these,a new fast calculation algorithm of 2 D symmetry object image Hu′s moment invariant is accomplished.And it can deal with the 2 D symmetry object image with rotated in any degree.Experimental results show that this reformed algorithm can work effectively and efficiently,and low error is introduced.

提出了基于二维轴对称性目标图象矩快速算法的实用化改进方案 算法实用化改进是通过两个命题的证明实现的 一是通过轴对称目标图象质心在对称轴上的命题证明 ,实现了将二维轴对称图象矩快速算法用于轴对称性图象中心矩的计算 ;二是通过目标图象以坐标系中任意两点为圆心 ,旋转相同角度 ,结果图象具有平移性的命题证明 ,实现了算法用于对旋转不同角度的对称目标图象的中心矩的计算改进 在此基础上 ,完成了二维轴对称目标图象高阶胡氏不变矩实用化快速算法的实现 实验证明 ,该算法具有较好的实时性能 ,且具有较小的引入误差

 
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