COMPARISON OF AUTOMATIC GEOMETRIC CORRECTION METHODS FOR ORTHORECTIFIED IMAGE STACKS

This work investigates the absolute geometric accuracy, computational efficiency, and trade-off between two common techniques used for improving the geometric consistency of orthorectified image stacks: Coregistration (CR) and Bundle Block Adjustment (BBA). A semi-analytical model is developed and Sentinel-2 data is used to derive realistic model parameters to quantify the differences between these techniques. The study reveals that while BBA shows significantly smaller errors than CR, it also demands substantially more computational resources. This trade-off thus renders the choice of technique highly dependent on the specific application and computational feasibility. By presenting empirical geometric accuracy curves, this paper provides insights that can help inform the selection of georeferencing techniques in the Earth Observation domain.