It is known to represent a square block of an image which has a maximum horizontal or vertical extension N as N vectors each representing one column or row, and encode it using an N×N discrete cosine transform matrix. We introduce a technique which transforms an input vector, or array, representing...http://www.google.com/patents/USRE42853?utm_source=gb-gplus-sharePatent USRE42853 - Method and apparatus for coding an image object of arbitrary shape
