1. A system for recognizing motion information of an object based on the images of said object, comprising: an imager for taking time-series images of an moving object; image capture means for capturing said time-series images of said object to generate image vectors; a primary component analyzer for obtaining, through principal component analysis, a plurality of eigenvectors of the image vectors of a sample object which are generated by said image capture means; a storage for storing said plurality of eigenvectors; inner product means for performing inner product operations between the image vectors of a recognized object which are generated by said image capture means and said plurality of eigenvectors stored in said storage means; and calculation means for obtaining the motion information of said recognized object based on the result of said inner product operations.