STRUCTURA - A C PROGRAM FOR ESTIMATING ATTRIBUTES OF 2-PHASE, HETEROGENEOUS STRUCTURES DIGITIZED FROM PLANAR SPECIMENS

A command-line controlled C program, STRUCTURA, is presented for estimation of attributes describing digital images of vertical sections through two-phase structures. The generation of attributes is in accordance with a horizontally isotropic and vertically heterogeneous structure model. The input to STRUCTURA is binary digital image in the form of a 2-D array of zeros and ones. Two 3-D attributes (surface area and porosity) and two 1-D attributes (horizontal pore and solid lengths) are estimated. The four attributes are placed in the output file; one row for each raster line. A set of test input data and its corresponding output also are given. An example of soil pore structure and possible approaches to other data analysis are described.