1. A method for identifying banding in a digital image comprising: accessing the digital image; determining by a processor for a particular pixel in the digital image, based on at least two candidate scales that represent sizes of regions that are evaluated for banding, whether at least one portion of the digital image includes one or more bands having a difference in color, the at least one portion including the particular pixel, and wherein determining whether at least one portion includes one or more bands further comprises: determining, for the at least two candidate scales, a result indicating whether banding is present at the particular pixel; and determining a most-likely scale of banding for the particular pixel based on the results for the at least two candidate scales.