Method for detecting shifts in line images obtained by a sensor that is airborne or moving in space

摘要

The invention relates to a method for detecting shifts in line images obtained by a sensor that is airborne or moving in space. The invention relates to a method for estimating shifts in line images of an image, referred to as a "composite image", made up of the juxtaposition of J line images. The line images show different portions of a scene on the surface (S) of a celestial body, sequentially acquired by a row of sensitive cells of a sensor (10) on-board a vehicle flying over said celestial body. The shifts in the line images are induced by sighting errors of the sensor (10) during the acquisition of the line image L_j. According to the invention, the lateral and/or longitudinal shift of a line image L_j, relative to a line image L_i, where j is different from i, is determined according to a local model of lateral and/or longitudinal variation of the similarity between different line images. The invention also relates to a method for forming composite images using line images with shifts.