Automatic detection of Kikuchi bands based on Radon transform and PPHT

Area of Science:

• Materials Science
• Crystallography
• Computational Methods

Background:

• Electron Backscatter Diffraction (EBSD) is crucial for determining crystal structure and orientation.
• Accurate analysis of EBSD patterns, specifically Kikuchi bands and their intersections, is vital for reliable crystallographic information.

Purpose of the Study:

• To develop an automated method for precise detection of Kikuchi band locations and intersections in EBSD patterns.
• To enhance the accuracy and reliability of crystallographic information derived from EBSD data.

Main Methods:

• Utilizes Radon transform for detecting straight lines corresponding to Kikuchi band edges.
• Employs progressive probabilistic Hough transform to identify line segments of band edges.
• Fits hyperbolas to the endpoints of detected line segments to represent Kikuchi bands.

Main Results:

• The proposed method automatically obtains accurate locations and intersections of Kikuchi bands.
• Numerical description of Kikuchi band information is achieved.
• Experimental validation demonstrates the robustness and improved accuracy of the method.

Conclusions:

• The developed automated method significantly enhances the analysis of EBSD patterns.
• This technique provides more accurate crystallographic orientation and structure information.
• The approach offers a robust solution for precise Kikuchi band detection and intersection identification.