2.3.1. Image registration
Image registration is a process whereby an image is resampled to conform to another image or topographicalmap
(e.g. US Navy maps). In this stage, the varying pixel sizes of
the different images were changed into a common map grid
based on a reference image/map. Evenly-distributed GCPs
(Ground Control Points) were selected in the different images
and registered with the referene images/maps . A RMS (R oot
Mean Sq uare) error of less than 0.5 pixels was acce pted for
the transformat ion. Resampling is preformed by converting dif ferent pixel sizes to the same final image pixel sizes