METHOD FOR INCREASING THE SPATIAL RESOLUTION OF A MULTISPECTRAL IMAGE FROM A PANCHROMATIC IMAGE

摘要

The invention relates to a method (50) for increasing the spatial resolution of an MS image from a PAN image, which includes, for a portion of the scene: - obtaining (51) parameter values of a scene model based on a similarity between a simulated MS reflectance and the MS reflectance; - determining (52, 53) a relative variation of the simulated MS reflectance with respect to a simulated PAN reflectance in the vicinity of the parameter values obtained; - estimating (54) a difference between the PAN reflectance and a reflectance of a PAN image with reduced spatial resolution; and - determining (54) an MS image with increased spatial resolution, by adding to the MS reflectance a correction factor corresponding to a product of this difference and this relative variation. The invention also relates to a corresponding image-processing system.