蒙特卡罗方法在高能闪光照相图像边界检测中的应用  

Application of Monte Carlo method to boundary location of flash radiographs

作　　者：张绚[1] 黄娇凤[1] 刘军[1] 管永红[1] 刘进[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2012年第12期2983-2986,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(61007065);中国工程物理研究院发展基金项目(2010B0202021)

摘　　要：提出了采用蒙特卡罗方法来模拟高能闪光照相物理过程,提供模拟图像用于边缘检测,依据模拟图像的边界退化来修正实验图像的边界,通过迭代计算获得较精确的客体边界。利用数值计算来验证和评估方法的精度与可靠性,实验图像处理结果表明:采用Canny算子获得的边界值误差在几个像素尺寸,采用该方法修正后边界值误差降低至1个像素尺寸或更低,相比于修正前精度得到了显著提升。This paper simulates the physical process of high energy radiography with the Monte Carlo method providing the analog image for edge detection,and to fix the boundaries of experimental images based on the analog image boundary degradation.More precise object boundary is obtained by iterative calculation.The accuracy and reliability of the method is validated by the means of numerical calculation,experimental image processing results show that： the error value of the boundary obtained by Canny operator is several pixel size,and after the amendment it is reduced to a pixel size or lower.So compared to the pre-revised accuracy is improved significantly.

关 键 词：闪光照相 边界检测 边界退化 蒙特卡罗方法 

分 类 号：R814.3[医药卫生—影像医学与核医学] O434.1[医药卫生—放射医学]