Bridge Over Water In The Remote Sensing Image Recognition Method Research

The technology of object automatic recognition in remote sensing image is a very active research field in recent years. Bridge is a typical object in the nature, the research of the automatic recognition of bridge has great meaning to both the military and the civil.Our work is to recognize the object of bridges which are across the rivers in the SPOT remote sensing images, i.e., to automatically find out bridges in complex remote sensing image by using technology of computer vision.To this day, there are two kinds of strategies in the technology of object automatic recognition: one is data driven, and the other is knowledge driven. The algorithm of bridge recognition in this paper adopts the knowledge driven strategy.It is made up of three processing steps--the primary step, intermediate step andadvanced step. Each step will be guided by its corresponding knowledge.Considering the different representation of bridges in the two different kinds of remote sensing images in different resolution(one is 10 meters/pixel , and the other is 20 meters/pixel), this paper respectively presents two suits of algorithms for these two kinds of images. Each step in these two different algorithms will take different processing method, yet they are all driven by knowledge.The method purposed in this paper is much faster and also more general than traditional recognition methods, it does well in realizing the automatic recognition of bridges across the rivers in remote sensing image.