The Circular Seal Identification Method Based on Average Relative Error

This paper proposes a circular seal identification method which based on the average relative error. First it spread out the circular seal into rectangular ones, so as to gain the seal of rectangular image, then it projects the rectangular seal to get projection curve. using projection curve of the reserved seal and the cyclic shift of detected seal projection curve to achieve registration. It calculated the average relative error that according to the registration after the reserved seal and detected seal. With the average relative error of the seal get the authenticity. The experimental results show that this method can simplify the computation and improve the seal authenticity identification effectively, which can also be applied to the actual.