The present invention relates to a method and a device for enhancing a digital image comprising samples or pixels.The method comprises: defining a patch of samples surrounding any given sample; computing distance values representing similarity between patches of a first sample and other samples to obtain a distance map; computing, using the distance map, weights to obtain a weight map; applying a filter enhancing high spatial frequencies to the weight map to obtain an enhanced weight map; filtering the first sample by averaging the samples using the enhanced weight map, to obtain an enhanced first sample. The invention provides a very efficient enhancement of the digital image since coherent structures that would usually not influence the enhancement of the image, are detected and made more significant thanks to the filtering of the weight map.