Patent ID: 7403207

Claim:
A method for enhancing the quality of an image on a combiner of a Head Up Display (HUD) which has been distorted by optical aberrations of the optical components of the HUD, comprising the steps of: a) determining intensity of a sub-pixel position within a pixelated source image that is desired to be reproduced on a combiner by gathering data from said pixelated source image, said step of gathering data, comprising the substeps of: i. receiving information from said pixelated source image regarding a first pixel at a position X0,Y0, having an intensity I(X0,Y0); ii. receiving information from said pixelated source image regarding a second pixel at a position X1,Y0, where said second pixel is adjacent to and to the right of said first pixel; iii. receiving information from said pixelated source image regarding a third pixel at a position X0,Y1, where said third pixel is adjacent to and below said first pixel; iv. receiving information from said pixelated source image regarding a fourth pixel at a position X1,Y1, where said fourth pixel is adjacent to and to the right of said third pixel; and, v. calculating a pixel value, I(X,Y), where I(X,Y)=(((Nx−(Nx*(X−X0)))*(Ny−(Ny*(Y−Y0)))*I(X0,Y0))+((Nx−(Nx*(X1−X)))*(Ny−(Ny*(Y−Y0)))*I(X1,Y0))+((Nx−(Nx*(X−X0)))*(Ny−(Ny*(Y1−Y)))*I(X0,Y1))+((Nx−(Nx*(X1−X)))*(Ny−(Ny*(Y1−Y)))*I(X1,Y1)))/(Ny*Nx), wherein the digital granularity is Nx per lateral pixel, Ny per vertical pixel and wherein X,Y is a subpixel position provided from said pixelated source image; and, b) utilizing said I(X,Y) to set the intensity of a pixel in a predistorted image to provide an enhanced image, wherein latency is minimized.