摘要
在流体力学不稳定性实验中,实际X光强度分布经过成像系统后会发生改变。要准确得到实际的光强分布,必须对系统的调制传递函数进行精确地测量。通过对刀口图像分析得到了系统的线扩散函数,再对其进行傅里叶变换得到调制传递函数,最后通过维纳滤波和约束最小二乘方滤波两种方法对图像进行了重建,得到比较清晰的边界情况和图像轮廓。
In hydrodynamic instability experiments, the X-ray intensity distribution will change after passing through the imaging system. In order to acquire the actual X-ray distribution, the MTF of the imaging system have to be measured accurately. The line spread function（LSF） of the imaging system was given by analyzing the edge image. The fourier transform of the LSF is the MTF of the imaging system. The image reconstruction was completed using Weiner filtering and constrained least square filtering. The boundary of the reconstruction image is clear.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2009年第2期245-248,共4页
High Power Laser and Particle Beams
基金
国家高技术发展计划项目
高温高密度等离子体物理国防科技重点实验室基金项目(9140C6801020801)
关键词
ICF
流体力学不稳定性
调制传递函数
线扩散函数
点扩散函数
图像重建
边缘扩散函数
ICF
hydrodynamic instability
modulation transfer function
line spread function
point spread function
image restoration
edge spread function
