A method for increasing resolution of digital video sequence

摘要

1. A method of increasing the dimensions of the digital image comprising processing a video sequence frame by frame, where each frame processed pixel based on the pixel information about the local region around it, thus performing the following operations: determine boundaries direction at that pixel; ! determining frequency characteristics of the treated area; ! determine the type of interpolation applicable to a given pixel; ! calculating an interpolated pixel value based on the data on the frequency characteristics of the treated area and border areas; ! operate based on the results of the pixel value interpolation operation to improve the boundaries; ! eliminate the multiplier effect by using a finisher function to the proportions adaptive interpolation. ! 2. The method of claim 1, wherein the applicable type of interpolation is determined by means of wavelets, in determining the boundaries of a given pixel areas, determining the type determining portion and belonging to a "checkerboard" region, and primarily calculated number corresponding to the frequency characteristics of the processed portion by a wavelet 5-3, which is used in the horizontal and vertical directions; determine the direction of boundaries in a given pixel using the value of the directional derivatives; define the type of area to be treated on the basis of the threshold principle. ! 3. A method according to claim 2, characterized in that for determining the boundaries of the current direction in the pixel values ​​of the derivatives are used, calculated by the following formulas: horizontal derivative of the pixels of the original image Calc'd