Análise comparativa entre modelos rigorosos e empíricos na orientação de imagens orbitais

Nowadays, orbital images can be considered the main source of spatial information providing support in several applications such as urban planning, topographic mapping, deforestation management, and so on. However, the quality of the orbital images georeferenced using ephemerides and attitude data is not sufficient in applications that require high metric accuracy. As a consequence, it is necessary to correct these images using ground control points through rigorous or empirical mathematical models. The aim of this work is to compare the results obtained with rigorous and empirical models in the orientation process, which is accomplished before the image geometric correction step. The collinearity model adapted to the pushbroom geometry was used as a rigorous model. The empirical models considered were: the Rational function model, the affine transformation, the polynomial model and the DLT (Direct Linear Transformation) model. The results showed that the rigorous model provided better results when compared to those obtained with the empirical models in the orientation process of ALOS/PRISM images.Pages: 2360-236