Abstract:
A new computer-vision cellular-phone-based methodology and scheme was developed to determine the
shape properties (Flatness Index, Elongation Index and Roundness Index) of coarse aggregate particles.
This scheme utilizes cellular phones images and image processing techniques (IPT) in determining the
coarse aggregate particles shape properties. This methodology compared with the conventional methods,
which need special laboratory technicians and are time consuming was faster and more accurate procedure.
Fifty coarse aggregate particles were collected and their shape properties were measured manually
(using caliper and AutoCAD) then computed using image processing procedure. To compute these shape
properties using image processing, special data acquisition method was designed and implemented. The
aggregate particles were arranged on a grid of an apparatus designed specifically for this task, and
mapped by the cellular phone from two views; top view and side view. Then cellular phones images were
analyzed with ImageJ software.