X射线探测器图像的恢复研究

Research on image restoration about X-ray detector

图像退化是引起X射线探测器图像质量下降的主要原因。图像恢复,可以提高系统的分辨率和对比度灵敏度。通过对射线成像系统图像退化的分析,介绍了反滤波信号恢复方法,并提出了一种近似恢复算法,该算法将反滤波恢复近似为除法运算的恢复。给出了恢复前后的图像及标准差的对比,实验结果表明了该算法的有效性。

The degradation of radiography is one of the important factors for X-ray detector. Imaging spatial resolution and contrast sensitivity can be improved by image restoration. By analysis on image degradation of X-ray imaging system, the restoration method of inverse filtering was introduced and an approximate restoration algorithm was proposed. The method approximately transforms inverse filtering algorithm into division algorithm. The images and the standard deviations for the images are given before and after restoration. The approximate restoration capability of the proposed solution is validated by experimental results.