A test target is written in a non image zone at set time intervals. The test target is sensed. At least one of frequency, amplitude and phase of banding, which is inherent in a printing device, is determined based on the sensed test target. At least one banding compensation parameter based at least on...http://www.google.de/patents/US20070052991?utm_source=gb-gplus-sharePatent US20070052991 - Methods and systems for determining banding compensation parameters in printing systems