A new method to segment X-ray microtomography images of lamellar titanium alloy based on directional filter banks and gray level gradient

Abstract

This paper presents a method for segmentation of 2D texture images of titanium alloys. The procedure is fully automated and is able to find and recognize so-called α-colonies from the image. The algorithm combines nonsubsampled directional filter banks (NSDFB) from the contourlet transform and gradient gray-level value to recognize directional orientations of α-colony. © 2012 Springer-Verlag Berlin Heidelberg.