Image registration using AutoLandmark

AutoLandmark is a fully automated image registration technique capable of performing real time landmark registration. It´s based on a correlation algorithm used to match the shoreline of a measured landmark to the corresponding shoreline extracted from a digital map. A cloud detection process implemented in AutoLandmark identifies cloudy pixels to avoid erroneous measurements from cloudy scenes. The validity of a measurement obtained with Autolandmark is determined by a quality metric (QM) which is calculated using several factors including the goodness-of-fit of the matching algorithm, scene cloudiness, and scene contrast. AutoLandmark is implemented in the Replacement Product Monitor (RPM) for landmark registration of the Geostationary Operational Environmental Satellite (GOES) imagery with subpixel accuracy. The RPM is part of the GOES Spacecraft Ground System and has been operational since 2001, producing more than a thousand daily landmark measurements