Patent ID: 6590606
Filing Date: 2003-07-08
Classification: H04N

Abstract:
A method for the compensation of geometric image errors in video images with plurality of, at least i, lines, each line having a plurality of image points, wherein the image errors to be compensated influence the length of the lines and the ith line in geometric image errors that have not been compensated begins at a location xai and ends at a location xei on a projection surface, comprising the steps of:deflecting a substantially parallel light bundle on the projection surface in two dimensions for sequential illumination of the image points of the video image; intensity modulating said light bundle for the image point at every location on which the light bundle is deflected at this location in accordance with the image point information of the undistorted video image; defining a value determining the start of the line of the compensated image by xad&gE;Max(xai) and defining a value determining the end of the line of the compensated image by xed&lE;Min(xei), where xed>xad; and deflecting the light bundle for the respective line deflected so that all image points of the line i are displayed sequentially within the area [xad; xed] on the projection surface; wherein the light bundle is scanned framewise diverging from a constant angle deflection with a function on the basis of which the line spacings of adjacent lines in the total image differ from one another by a maximum of 30%.