Digital image correlation

• Main Author: Lin, Sheng
• Other Authors: Qian Kemao
• Format: Final Year Project
• Language: English
• Published: 2014
• Subjects: DRNTU::Engineering::Computer science and engineering::Computing methodologies::Image processing and computer vision
• Online Access: http://hdl.handle.net/10356/59258
• Institution: Nanyang Technological University

As a new and low-cost optical measurement technique to study the displacement and strain distribution on the surface of a planner specimen with high precision, twodimension digital image correlation (2D DIC) is now widely accepted and applied in many areas of picture or image processing. This process, also known as template matching, is used to locate an object in a picture or match pieces of two images to one another in image registration. The 2D DIC technique is an optical method that uses a mathematical correlation analysis to examine digital image data taken. This technique consists of two main steps: consecutive images capturing during the deformation period and analyse the behaviour of the specimen while is subject to incremental loads. In this report, the methodology of implementing the 2D DIC that used in the project is reviewed and discussed. Detailed accuracy measurement and results analysis are provided. Proposals and suggestions for achieving a better accuracy measurement and further improvement are also recommended. The results of this project show a great application potential of the 2D DIC technique for various situations. Based on the simple surface preparation and the ability to acquire displacement/strain measurements over a large range of deformation, 2D DIC should serve as a valuable tool for varieties of researches and applications.