Compute border needed to apply one or several homographies without clipping.
misc/homography_maximal_border homography.json/homographies.json width height out_border.json
The first argument can either be one view homography, or multiple view homographies. (One for each view in a dataset, for example for rectification.) width and height are the size of the images on which these homographies will be applied.
It writes the border in out_border.json, such that applying any of these homographies on an image of the given size, will never result in clipping.