Study of vector method from pixel map
彩色栅格地图矢量化方法研究 *

Based on the idea of gradient edge and fuzzy edge detecting,adopted fuzzy-gradient subarea method and it solved the problem which the general methods could not pick-up the fuzzy foreground elements from the map clearly.After removing the background of the map,this paper presented an optimal-component method to divide one kind foreground elements from the foreground and was successfully used in separating foreground.Then presented a method base on characteristics of gradient.Finally,it processed after-processing with mathematical morphology.The foreground elements getting from the map could reflect the characteristics of the map's space and color.It was accurate and kept the form of the line very well.Experiments prove that running speed and the result are satisfied.