Implementations of a two-dimensional pyramid filter are disclosed including a two-dimensional pyramid filter architecture of an order 2N−1, where N is a positive integer greater than three. The two-dimensional pyramid filter architecture of order 2N−1 may include one-dimensional pyramid filters of...http://www.google.de/patents/US6889237?utm_source=gb-gplus-sharePatent US6889237 - Two-dimensional pyramid filter architecture
