Image Analysis Technique for Aggregate Morphology Analysis with Two-Dimensional Fourier Transform Method

测距 骨料(复合) 干涉测量 光学 傅里叶变换 球形 材料科学 分形 生物系统 计算机科学 物理 数学 复合材料 电信 量子力学 生物 数学分析
作者
Wenjuan Sun,Linbing Wang,Erol Tutumluer
出处
期刊:Transportation Research Record [SAGE Publishing]
卷期号:2267 (1): 3-13 被引量:38
标识
DOI:10.3141/2267-01
摘要

This paper presents some results of the NCHRP 4–34 Laser Detection and Ranging project. A high-resolution Fourier transform interferometry (FTI) system was developed for aggregate morphology characterization with the use of a fiber-optic coupler to form a Young's double-pinhole interferometer. The FTI system used a charge-coupled device camera to capture fringe images of aggregates with a size ranging from ¾ in. to No. 50 and to reconstruct three-dimensional surfaces of aggregates on the basis of fringe distortions from the captured digital images. A program was developed in MATLAB to quantify morphologic characteristics of aggregates from a variety of sources. The output results include sphericity, flatness ratio, elongation ratio, angularity, and texture for each individual aggregate particle. In this paper, only the morphologic characteristics of seven types of coarse aggregate with sizes ranging from ¾ in. to No. 4 are presented. These aggregates were also analyzed with the Aggregate Image Measurement System (AIMS) II and the University of Illinois aggregate image analyzer (UIAIA) for further comparison. The FTI system is easy to operate and can rapidly quantify morphologic characteristics of aggregates. The FTI results of these aggregates are generally consistent with the results of AIMS II and UIAIA with regard to roughness rankings despite minor differences for several aggregates.
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