1. A method for substantially reducing effects of noise and distortions within a digital image in a single pass of the image, comprising: for each of a plurality of pixels of the digital image, determining a new value for the pixel by using a bilateral filter taking into account values of the pixels within the digital image, and credibility values of the pixel, the credibility value for a pixel corresponding to a likelihood that a value of the pixel is valid in relation to the image and that the value does not correspond to distortions within the digital image; and, outputting the digital image within which the effects of distortions have been reduced, wherein the credibility value for each pixel corresponds to a likelihood that the value of the pixel is valid in relation to the image, regardless of whether the pixel is part of an edge of the image or not part of the edge of the image.