Image registration method

An image registration method, characterized by comprising:

• selecting a registration source image {p} and a registration target image {qj}, wherein 0<i<M, 0<j<N, M and N are positive integers, and M<<N;
• applying a random perturbation to the image {pi} in accordance with a preset random perturbation control parameter σ so that it is deformed to obtain an image {pi′}, and obtaining closest points on the image {q,} corresponding to points on the image {pi′}, the obtained set of points being an image {qj′};
• performing an iterative operation on the image {pi′} and the image {qj′} within a preset step length L in accordance with a preset initial coordinate transformation H0 to obtain a coordinate transformation {Hi}, 0<l<L, between the image {pi′} and the image {qj′},and calculating an average distance {El} corresponding to the coordinate transformation {Hl} in accordance with the coordinate transformation {Hl};
• judging magnitudes of the average distance {El} and a preset ideal average distance Ex, and terminating the registration when the average distance {El} is smaller than or equal to the preset ideal average distance.