Abstract: Considering that contour contains a lot of critical information in the image,a new curve matching algorithm is proposed based on the V-system which is a class complete orthogonal function system under the assumption that the two images are similar.Firstly,the distance is calculated between curves using the descriptor of V-system to find the matching curves,and then the matching parameters are evaluated,Finally,the two images are stitched together.Different from the existing approaches,this paper considers contour features as a whole feature curve,thus the difficulty of feature selection is avoided.Through a large number of simulations and real images,in spite of the fact that the images do not satisfy the similar transformation strictly,the result is still satisfactory which verifies the feasibility of the algorithm.