Reality augmenting system and method based on image feature matching

The invention relates to a reality augmenting system and method based on image feature matching. By means of the matching technique of processing an image according to natural feature information of the image, the identity-free reality augmenting technology for multiple templates is achieved. In the feature point matching process, the error-removing matching algorithm is used, so that the accuracy of image matching is improved; feature parameters are extracted twice through the coarse-to-fine strategy; when matching fails or tracking fails, a system just needs to execute coarse feature extraction, so the execution speed of the system is increased; in the matching process of feature points of a target image and feature points of an identity image, the tracking algorithm is used for estimating the positions of the matching feature points of a next frame according to the currently matching feature points to obtain feature point pairs which change stably, so that the stability of model display is guaranteed, and user experience is improved.