A method and apparatus for obtaining correction values for convergence setting in video projection devices includes calculating the correction values for the individual video lines at least in part by interpolation between correction interpolation point values. The correction interpolation point values are in this case distributed in the form of a grid over the screen area of the video projection device. During the calculation of correction values for the video lines of a first field of the video frame, a respective set of two intermediate or final values for the interpolation is calculated, which set is applicable to neighbouring lines in different video fields, but in each case only one intermediate or final value is used for the convergence correction in the current video line. As a result, optimal convergence correction can be set for each video line without a high memory outlay and without high computing complexity.