15. The method as claimed in claim 11 , wherein the known graph representable distributions are constrained by a measure of relevance of coupling terms between the plurality of pixels.
15. The method as claimed in claim 11 , wherein the known graph representable distributions are constrained by a measure of relevance of coupling terms between the plurality of pixels. 17. The method as claimed in claim 15 , wherein the measure of relevance rel ijk is determined by the relationship of pluralities of triplets of pixels i, j and k in the corrupted image and provided by the equation: rel ijk = 1 6 ⁢ ( α ijk 001 + α ijk 010 + α ijk 100 + α ijk 011 + α ijk 101 + α ijk 110 - 3 ⁢ α ijk 111 - 3 ⁢ α ijk 000 ) .