Optimal approximation of uniformly rotated images: relationship between Karhunen-Loeve expansion and discrete cosine transform.

Michihiro Uenohara Takeo Kanade Optimal approximation of uniformly rotated images: relationship between Karhunen-Loeve expansion and discrete cosine transform. 116-119 1998 7 IEEE Transactions on Image Processing 1 http://dx.doi.org/10.1109/83.650856 db/journals/tip/tip7.html#UenoharaK98