Abstract: A method for increasing spatial resolution of a MS image using a PAN image. For a portion of the scene, values of parameters of a scene model are obtained according to a resemblance between a simulated MS reflectance and the MS reflectance. A relative variation in the simulated MS reflectance is determined with respect to a simulated PAN reflectance near the values of parameters obtained. A difference between the PAN reflectance and a reflectance of a PAN image with reduced spatial resolution is estimated. An MS image with increased spatial resolution is determined, by adding to the MS reflectance a correction corresponding to a product of this difference and this relative variation. A corresponding image-processing system is also provided.

Abstract: A method for processing an optical image acquired by a space vehicle or an aerial vehicle having a ground reflectance model and an atmospheric model, the atmospheric model having an aerosol model and a cloud model; determining optimal values of atmospheric model parameters to optimise the atmospheric model with respect to the image; determining correction parameter values for each layer of the atmospheric model, converting the image into a ground image with environmental effects according to the correction parameter values, converting the ground image with environmental effects into a ground image with no environmental effects according to the correction parameter values.

Abstract: A method for processing an optical image acquired by a space vehicle or an aerial vehicle having a ground reflectance model and an atmospheric model, the atmospheric model having an aerosol model and a cloud model; determining optimal values of atmospheric model parameters to optimise the atmospheric model with respect to the image; determining correction parameter values for each layer of the atmospheric model, converting the image into a ground image with environmental effects according to the correction parameter values, converting the ground image with environmental effects into a ground image with no environmental effects according to the correction parameter values.