摘要
X射线光栅成像技术可以利用传统X射线机在一次成像中同时获取被检测体的衰减、相衬与暗场信息。介绍了当前X射线光栅成像的基本原理与系统结构,分析了同一成像传感器在同一时空场景下获取的三种信息的各自特性以及相互之间的影响与相关特性,利用基于小波变换的图像融合方法对衰减、相衬与暗场信息进行融合。对Pfeiffer等的原始实验数据的仿真验证表明:合理的图像融合技术可以实现对同时包含有多种轻、重元素物质在内的大动态范围高分辨率一次性单图成像检测。
X-ray grating imaging technology can use traditional X-ray machine to get the attenuation, phase contrast and dark information of the object to be tested in one image. The basic principle and system structure of the X-ray grating imaging are introduced. And then, the respective characteristics, mutual influence and relevant features of three kinds of information of the same scence are analyzed, which are obtained by the same sensor in the same space and time. The attenuation, phase contrast and dark information are used to fuse based on the wavelet transform. The simulation results of the original Pfeiffer＇s experimental data show that, reasonable image fusion technology can realize a one-time high resolution imaging detection in large dynamic range, including various light and heavy elements.
出处
《激光与光电子学进展》
CSCD
北大核心
2012年第11期84-89,共6页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61171178
61171179)
博士后科学基金(20110490366)
山西省高等学校优秀青年学术带头人支持计划资助课题
关键词
图像处理
X射线
光栅成像
图像融合
小波变换
image processing
X-ray
grating imaging
image fusion
wavelet transform
