Level set method is an important numerical scheme to PDE image analysis

while the most serious problem is that level set is accompanied with high computation cost

slow speed

and especially frequent re-initialization. The paper carefully researches the disadvantages and presents a new initialization method based on mathematical morphology. The new method includes two schemes

i.e. smoothing scheme and reconstruction scheme

which perform two operations of smoothing inaccurate distance function and rebuilding narrow band separately using open

close and expansion operations. The proposed method is not only of high efficiency

but also can deal with the topology variations adaptively. This method can replace the conventional methods successfully and can also be applied in the real-time image processing.