一般认为,样品受入射电子的弹性散射形成高分辨电镜图象的衬度,而非弹性散射电子形成低分辨的非周期性的背底叠加在图像上,使图像的村度降低。本文指出,应用频率域高通滤波法对高分辨电镜图像进行计算机处理,可以大大减弱非弹性散射引起的背底,使图像的村度得到显著改善。 It is generally believed that the sample is elastically scattered by incident electrons to form a contrast layer of high-resolution electron microscopy images, whereas non-elastic scattering electrons form a low-resolution, aperiodic back-ground superimposed on the image, reducing the village size of the image. This paper points out that applying high-pass filtering of frequency domain to the computer processing of high-resolution electron microscope images can greatly reduce the background caused by inelastic scattering and make the village image of the image be significantly improved.