Structure Analysis of the FRP Rebar Using Computer Vision Techniques

Abstract: In this paper we present a method to analyze the inner structure of the composite FRP rebar, namely the shift of the real center of gravity with a respect to the geometrical center of rebar and changes of cross-sectional characteristics. We propose an automated pipeline based on classical computer vision techniques and on the ratio between the glass fibers and epoxy filament in the analyzed cross-section to compute the shift vector of the real center of gravity in respect to the geometrical center together with the cross-section area and its principal moments. We discuss the achieved results over two cross sections in a different portion of the rebar and in the end, we suggest possible direction and improvements for our future work. We also made our code publicly available.