@article {Jogan2003a, title = {Karhunen-Loeve Transform of a Set of Rotated Templates}, abstract = {We propose a novel method for efficiently calculating the eigenvectors of uniformly rotated images of a set of templates. As we show, the images can be optimally approximated by a linear series of eigenvectors which can be calculated without actually decomposing the sample covariance matrix.}, author = {Matja\v{z} Jogan and Emil \v{Z}agar and Ale\v{s} Leonardis}, number = {7}, pages = {817-825}, volume = {12}, year = {2003}, journal = {IEEE Trans. on Image Processing} }