Reading Local Structure for Ferroelectric Ceramic by Convergent Beam Electron Diffraction and Artificial Intelligence Method
Autor: | Jinghui Gao, Jingzhe Xu, Tongxin Zhao, Zhixin He, Y. Wang, Wenbo Yan |
---|---|
Rok vydání: | 2019 |
Předmět: |
010302 applied physics
Similarity (geometry) Computer science business.industry Texture (cosmology) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Symmetry (physics) Hough transform law.invention Visualization law 0103 physical sciences Principal component analysis Canny edge detector Artificial intelligence 0210 nano-technology Mirror symmetry business |
Zdroj: | 2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP). |
DOI: | 10.1109/ceidp47102.2019.9009960 |
Popis: | Crystal structures are always considered as origin of properties of dielectric materials, which poses importance for microscopic observation, especially for materials with peculiar local structures. Convergent beam electron diffraction (CBED) is a widely used informative method of reading crystal structure. However, identifying CBED images by traditional artificial methods is a time-consuming process accompanied with certain ambiguity, which limits its application. Here, we identify CBED images by artificial intelligence methods to solve that problem. The method includes segmenting patterns and analyzing mirror symmetry of CBED images. Canny edge detection and Hough transform are used to divide CBED patterns into discs individually, which can successfully extract common key information of all CBED images. Then the direct grey level symmetry similarity evaluation (DGLS) and texture symmetric similarity detection method based on principal component analysis (TSPCA) are both calculated to estimate mirror symmetry performance quantitatively. The average matching rate of accuracy between computer calculation and visual inspection is 96.0% for DGLS and 97% for TSPCA. This method provides a uniform standard for mirror symmetry identification and is more conducive and objective to the analysis of a large number of experimental CBED images, which is of great significance to promote the further research of reading local structure for ferroelectric ceramic. |
Databáze: | OpenAIRE |
Externí odkaz: |