The Research Of Automatic Image Registration Algorithm

Automatic image registration is a comprehensive image processing technology that to achieve the high precision and high efficiency image registration automatically. As the core technology of image processing, automatic image registration is one of the key methods in image fusion, image reconstruction, 3D modeling. And it has wide application and high value n the industrial, military, scientific research.This paper discusses the geometric transformation model, feature detection and matching algorithms, and model parameter estimation algorithm in detail. In order to meet the requirements of high precision and efficient, SIFT algorithm and RANSAC algorithm have been changed a lot. But automatic image registration is not the simple combination of these algorithms; it has a complete architecture of itself. From the view of system, this paper introduces the image multiscale analysis technology and related areas analysis technology, proposed method of "bottom to up, layer by layer, step by step". Image multiscale analysis eliminates the image details, and let image feature points be more stable. Related areas analysis detects overlap areas between images, and makes automatic registration be more efficient. Automatic image registration forms a complete organic architecture by combination of these image processing techniques.Simulation results show that the proposed automatic image registration algorithm in this paper can estimate parameters in high precision, small error, and can't affect by the image size. Compared by direct registration method, Group results show that automatic image registration algorithm has been greatly improved, achieved high efficiency. Therefore, this paper's automatic image registration algorithm achieves three requirements of automated, high precision and high efficiency.