Gradient-based method for pixel interpolation e.g. for TV images, requires initial selection of first and second picture elements each assigned first and second image /picture information values

摘要

A method for interpolating a picture element (pixel) (P(x,y)) in an image/picture having a number of picture elements arranged in a matrix to each of which is assigned an image information value, involves selecting at least one first picture element (P( x+1, y)) assigned a first image information value (L( x+1, y)) and a second picture element assigned a second image information value (L( x-1, y)), determining in each case a gradient of the image information value, ascertaining a picture information value (L(x,y)) of the picture element to be interpolated by using the respective first information value and the second information value, in which the image information value (L( x+1, y)) of the picture element (P(x+1) y));P(x-1, y) is more heavily weighted and its associated gradient is smaller.