Head-up display system comprising: - a processing module designed to determine modified data representing a warped image (I') depending on initial data representing an original image and on warping data defining an image warpage D(α, β) to be applied to the original image; - a device for generating a light beam representing said warped image (I'); - a projecting device designed to project the light beam in an adjustable direction onto a semi-transparent plate, said semi-transparent plate being designed to display the warped image by reflecting the light beam in the direction of the user, said adjustable direction allowing the region of the semi-transparent plate that reflects the warped image to be made to vary, and said warping data defining an image warpage being designed to counteract the warpage resulting from reflection from a non-planar surface of the semi-transparent plate, the processing module being designed to select said warping data defining an image warpage from a warping table depending on said adjustable direction, the warping table comprising a first set of warping data defining the image warpage D(α0, β0) to be applied to the original image to determine the modified data representing the warped image (I') when the projecting device projects the light beam in a first direction defining a first region of the semi-transparent plate from which the warped image is reflected, and a second set (E') of data that is different from the first set, defining the image warpage D(α1, β1) to be applied to the original image to determine the modified data representing the warped image (I') when the projecting device projects the light beam in a second direction distinct from the first direction and defining a second region of the semi-transparent plate from which the warped image is reflected, characterized in that the first region and second region of the semi-transparent plate have a common region, and in that the warping data of the warping table that relate to the common region are common to the dataset E and to the dataset E', and are used to determine the modified data representing the warped image for each of the first direction and second direction. - a processing module designed to determine modified data representing a warped image (I') depending on initial data representing an original image and on warping data defining an image warpage D(α, β) to be applied to the original image; - a device for generating a light beam representing said warped image (I'); - a projecting device designed to project the light beam in an adjustable direction onto a semi-transparent plate, said semi-transparent plate being designed to display the warped image by reflecting the light beam in the direction of the user, said adjustable direction allowing the region of the semi-transparent plate that reflects the warped image to be made to vary, and said warping data defining an image warpage being designed to counteract the warpage resulting from reflection from a non-planar surface of the semi-transparent plate, the processing module being designed to select said warping data defining an image warpage from a warping table depending on said adjustable direction, the warping table comprising a first set of warping data defining the image warpage D(α0, β0) to be applied to the original image to determine the modified data representing the warped image (I') when the projecting device projects the light beam in a first direction defining a first region of the semi-transparent plate from which the warped image is reflected, and a second set (E') of data that is different from the first set, defining the image warpage D(α1, β1) to be applied to the original image to determine the modified data representing the warped image (I') when the projecting device projects the light beam in a second direction distinct from the first direction and defining a second region of the semi-transparent plate from which the warped image is reflected, characterized in that the first region and second region of the semi-transparent plate have a common region, and in that the warping data of the warping table that relate to the common region are common to the dataset E and to the dataset E', and are used to determine the modified data representing the warped image for each of the first direction and second direction.