Embodiments of the present invention provide a method and an apparatus for acquiring a weight coefficient of a digital filter so as to enhance a processing effect of images or videos and reduce the complexity of operations. The method includes: extracting global block features and local block features of image blocks, where the image blocks include a first image block and a second image block; acquiring an image block distance fs between the first image block and the second image block according to a global block feature and local block features of the first image block as well as a global block feature and local block features of the second image block; and evaluating a value of e fs/θ2.