Abstract: Classical geodesic active contour is sensitive to initial location and noise. So, it often fails to converge to the true edge when the initial location is far from target edge or there is noise interference. The geodesic active contour aided with CV-GVF method is therefore proposed by way of combining the geodesic active contour with the coupling force field composed of gradient vector flow and CV method. Experimental results showed that it can converge exactly to the target edge in noise background from any initial location without special setting, i.e., high adaptability to initial location and background noise.