Polynomial curve fitting method for refraction-angle extraction in diffraction enhanced imaging

Polynomial curve fitting method for refraction-angle extraction in diffraction enhanced imaging
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衍射增强成像折射角提取的多项式曲线拟合方法

DOI:
10.1088/1674-1137/33/11/008
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发表时间:
2009-11
期刊:
影响因子:
3.6
通讯作者:
Wang Zhen-Chang
Wang Zhen-Chang
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zhang Li;Chen Zhi-Qiang;Ding Fei;Zhu Pei-Ping;Huang Zhi-Feng;Yin Hong-Xia;Wang Zhen-Chang

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相似文献

采用x射线衍射增强成像技术(DEI)检测弱吸收低z样品的内部结构。如何从摇摆曲线不同位置测量的原始图像中提取相位信息是DEI的关键问题。本文提出了一种有效的提取方法——多项式曲线拟合法,以便快速准确地提取出信息角。并与现有的多图像统计方法和高斯曲线拟合方法进行了比较。在北京同步辐射设施对塑料圆柱体和黑蚂蚁的实验结果证明,多项式曲线拟合方法可以得到最近似的折射角值,其计算速度比高斯曲线拟合方法快10倍。
X-ray diffraction enhanced imaging (DEI) is applied to inspect internal structures of weakly absorbing low-Z sample. How to extract phase information from raw images measured in different positions of rocking curve is the key problem of DEI. In this paper, we present an effective extraction method called polynomial curve fitting method, in order to extract accurate information angular in a fast speed. It is compared with the existing methods such as multiple-images statistical method and Gaussian curve fitting method. The experiments results on a plastic cylinder and a black ant at the Beijing Synchrotron Radiation Facility prove that the polynomial curve fitting method can obtain most approximate refraction-angle values and its computation speed is 10 times faster than the Gaussian curve fitting method.
DOI: 10.1088/0022-3727/39/19/004
发表时间: 2006-10
期刊: Journal of Physics D: Applied Physics
影响因子: --
作者:
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