In recent years,with the advancement of machine vision,pattern recognition and content-based image retrieve and the wide use of color images,image segmentation,especially color image segmentation,has played a more and more important role.Therefore,a fast and effective segmentation method for color image was proposed,which mainly included three steps.Firstly RGB color space was transformed into HSV space,and image pixels were divided into singular and non-singular points according to their saturation and intensity;then the singular and non-singular points were segmented respectively based on hue level histogram and grey level histogram respectively;finally region merging method was adopted to merge the previous results of segmentation.The experimental results show that this method can effectively extract color image of the object and have certain robustness.