1. A method for processing images to be displayed on a display device, the method comprising: defining a new region to be processed by a transformation application circuit; recording said new region in a list of regions to be processed by said transformation application circuit, each region of said list of regions having associated therewith a transformation of said transformation application circuit, and providing region parameters corresponding to said new region in said transformation application circuit, said transformation application circuit provided at an output of a graphics processing system including a display controller and operable to receive from said display controller of said graphics processing system image data representative of a sequence of images formatted for display on said display device, the image data comprising, for each image of said sequence of images, a formatted set of pixels and synchronization signals, and process each image of said sequence of images by, for each one of the pixels of the image, identifying in said list of regions at least one region the pixel belongs to, identifying the transformation associated with the at least one region, and applying the identified transformation to the pixel; using said transformation application circuit for processing a first image of said sequence of images according to said region parameters; detecting changes in said region parameters; and updating said transformation application circuit for processing a second image of said sequence of images according to said changes in said region parameters.