Active contours driven by local and global intensity fitting energy(LGIF model) is much less sensitive to the initialization of the contours and noise,and it can address the segmentation of images with intensity inhomogeneity.However,the evolution equation of this model needs many Gaussian convolutions per iteration,which make the segmentation speed extremets show that the model is not only able to deal with intensity inhomogeneity,but also the segementation efficiency is more effiicient than LGIF model.