1. A method for image refining of digital x-ray images, comprising: using a processor to do the following steps; providing an image processing module; supplying to the image processing module a parameter from a current parameter set; displaying an associated model image for a standard parameter set by using a stored image data; selecting at least some standard parameter sets from a plurality of available standard parameter sets; and forming a current parameter set from the selected standard parameter sets, wherein when a parameter set comprises a two-dimensional matrix of parameters p ij (i,j=1, 2, 3,. .. ), then a current parameter set P akt is formed of a linear combination of selected standard parameter sets P Nr.1 (1=k 1 , k 2 ,. .. with k 1 , k 2 ,. .. ε1, 2,. .. , K) from the plurality of available standard parameter sets P Nr.k (k=1, 2,. .. , K), wherein said linear combination is defined by the following equation p ij akt = ∑ l ⁢ ⁢ a l · p ij Nr. l , wherein p ij Nr.1 represents a parameter p ij in a selected standard parameter set P Nr.1 , wherein p ij akt represents a parameter p ij in a current parameter set P akt , wherein a summation defined by said equation extends through each of the selected standard parameter sets P Nr.1 (1=k 1 , k 2 ,. .. ), where a 1 represents a weighting factor of the selected standard parameter set P Nr.1 , wherein each weighting factor a 1 is a number whose value ranges from a value of zero to a value of one, and wherein a sum of all weighting factors a 1 (1=k 1 , k 2 ,. .. ) yields a value of 1.