Detection Of Distribution Dimension Of The Earth-rock Aggregate Based On Digital Image Process

The "earth-rock" in the title of this paper is a loose rock which is composed of gravel or cobble which used as aggregate and clay or sand which used as filling material. Doctor Xinhua Liu called it as earth-rock aggregate and classified it between rock mass and soil mass. For its special characteristics of physical mechanical, the earth-rock is a import study subject in civil engineering domain.From the establishment of fractal geometry, technician had started to use some parameters including Distribution fractal dimension of coarse grain and coarse grain boundary contour line as a new research method on microstructure of earth-rock aggregate. They combined the parameters and macroscopic properties of physical mechanical of earth-rock aggregate to get their quantitative relation which be used to explain the characteristics of mechanical behavior of earth-rock aggregate. The parameters of distribution fractal dimension can also be classification basis for engineering of earth-rock aggregate.Now technician can only calculate grain-size fractal dimension by sieve analysis in manual operation way to research the microstructure of earth-rock aggregate. Although the way of sieve analysis is accurate and effective, it restricted the technician to research further for its narrow of scope of application and its inconvenient operation.In this paper realized experimentally one process of distribution fractal dimension detection of earth-rock aggregate base on digital image process through a lot of experimental and modify an algorithm of enclosed edge extraction base on the algorithm of 8-direction edge tracing in binary image.At first, this paper get a more effective de-noising algorithm after comparing the result of de-noising algorithm of commonly used. Subsequently, this paper got binary image when found a optimum segmentation algorithm. Later, having compared the result of conventional algorithm of edge detection, this paper modified an algorithm of enclosed edge extraction which accomplish enclosed edge extraction, de-noising and hole-filling in same time and guarantee the accurate of calculating perimeter and area.The Detection of distribution fractal dimension of earth-rock aggregate base on digital image process decreased labor intensity for technician to detect the distribution fractal dimension in manual operation and enriched the research method of microstructure of earth-rock aggregate for technician and enlarged the scope of application for fractal and use for reference to some detection of distribution fractal dimension base on digital image process in other domain.