A method for blurring in signal processing, for example, in digital film processing, is performed with digital artifacts. The digital artifacts are derived, such as by scanning, and include a noisy artifact and a less noisy artifact. The artifacts are subdivided into a plurality of windows, with each...http://www.google.de/patents/US7020344?utm_source=gb-gplus-sharePatent US7020344 - Match blur system and method
