1. A method of reducing an artifact at a block boundary in a decompressed digital image comprising the steps of: (a) identifying a plurality of interpolation pixels including at least one pixel on each of a first side and a second side of said block boundary; (b) identifying one said interpolation pixel on said first side of said block boundary as a subject pixel; (c) determining a distribution of a scalar characteristic of said interpolation pixels; (d) selecting a plurality of filter coefficients correlated to said distribution of said scalar characteristic; and (e) modifying an intensity of said subject pixel by applying a filter producing said modified intensity of said subject pixel as a function of said filter coefficients.