Investigation On Fractal Characteristics Of Water System Extracted From Remotely-Sensed Imagery

The pattern of water system is formed by the stress in the Earth, and it shows some Characteristics of geology and geography. It can reflect the Characteristics of geological structure and crustal movement that may result information of water system. According to the different forms of water-plane, we can divide into dendritic river water system, braided river system, parallel-water system, radial water system, ring water system, lattice-like water system, and so.This thesis makes use of computer technology, forth fractal mathematics, mathematical morphology, the least squares method, and pattern recognition technology to automatically classify water system of classification methods. Fractal dimension of the water system, classification factor (scale-free interval) to identify, classify, such as standard-setting discussions in detail, and the realization of a fractal river system to deal with the prototype system development and initial test. Prototype system by the graphical input and output, image pre-processing, water statistics, River tributaries point direction angle, the fitting, the water system fractal calculations, classification, water scale - measure out the two-point log-linear regression mapping eight modules, etc. Can automatically determine braided river system, barb-like water system, radial water system, lattice-like water system, dendritic drainage, Horn River, rib-like water system, the parallel-like water system, a total of 9 types of water ring type of water system.The main contents of the study are as follows:1, Combination the theory related to images, that is, the color and model of the links between the pixels, realize the Remote Sensing images from color to gray-scale conversion and binary digital image processing. According to the knowledge of mathematical morphology, Achieved the refinement of digital image processing by uses of hit-miss transform principle, structure of the eight directions. 2, compiled several existing water system in accordance with the type of division of visual interpretation methods of visual interpretation of the basis for division of water.3, introduced in the water system to deal with the application of fractal technology direction and the fractal dimension and scale-free interval to determine the general method of calculation.4, a scale-free to determine, the method used to achieve a number of the scale-free range and to assist the general use of the geometric method for the classification system.5, Calculated the fractal dimension on a number of scale-free interval respectively, and statistical analysis of water systems to have different scales in different range of fractal dimension value. Finally, Map the scale - measure out two-point log-linear regression graph.