高分辨率透射电子显微镜
光学
光传递函数
对比度传递函数
镜头(地质)
图像分辨率
分辨率(逻辑)
计算机科学
迭代重建
传输(电信)
材料科学
物理
计算机视觉
人工智能
算法
透射电子显微镜
球差
电信
作者
Xiaohan Zhang,Shao-Wen Chen,Shuya Wang,Ying Huang,Chuanhong Jin,Fang Lin
摘要
Abstract High‐resolution transmission electron microscopy (HRTEM) images can capture the atomic‐resolution details of the dynamically changing structure of nanomaterials. Here, we propose a new scheme and an improved reconstruction algorithm to reconstruct the exit wave function for each image in a focal series of HRTEM images to reveal structural changes. In this scheme, the wave reconstructed from the focal series of images is treated as the initial wave in the reconstruction process for each HRTEM image. Additionally, to suppress noise at the frequencies where the signal is weak due to the modulation of the lens transfer function, a weight factor is introduced in the improved reconstruction algorithm. The advantages of the new scheme and algorithms are validated by using the HRTEM images of a natural specimen and a single‐layer molybdenum disulphide. This algorithm enables image resolution enhancement and lens aberration removal, while potentially allowing the visualisation of the structural evolution of nanostructures.
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