A computer-implemented process which comprises at least the following steps: - receiving at least one image or a plurality of images, the at least one image having been recorded at a determined measuring geometry, or each image of the plurality of images having been recorded at a different measuring geometry, in relation to a surface of a target coating (43, 130), using an image capture unit (120, 42), - implementing an image analysis for each of the images obtained, executing at least one filter technique in the form of a frequency analysis employing a high-pass filter and/or an edge recognition method in conjunction with a light-intensity filtering procedure, using at least one processor (44, 46), - identifying at least one sparkle point within a respective image, - implementing a features analysis of the at least one identified sparkle point in the respective image in respect of at least one predefined size feature, using the at least one processor (44, 46), - determining at least one value for the at least one predefined size feature for the at least one sparkle point, - calculating a size distribution for the respective image based on the determined value for the at least one predefined size feature, using the processor (44, 46), wherein a correlation is derived for at least one toner with the determined value for the at least one predefined size feature of the at least one sparkle point, the correlation indicating a contribution of the at least one toner to the size distribution of the at least one sparkle point, more particularly of two or more identified sparkle points in the respective image, and is used in order to adapt a quantity for the at least one toner, to be specified when providing a formulation, to the calculated size distribution of the at least one sparkle point, - providing a formulation for a coating which is identical or at least similar in appearance to the target coating (43, 130), taking account of the calculated size distribution and using the processor (44, 46), wherein the provision of the coating formulation comprises the provision of a list of toners together with quantity and/or concentration data. - receiving at least one image or a plurality of images, the at least one image having been recorded at a determined measuring geometry, or each image of the plurality of images having been recorded at a different measuring geometry, in relation to a surface of a target coating (43, 130), using an image capture unit (120, 42), - implementing an image analysis for each of the images obtained, executing at least one filter technique in the form of a frequency analysis employing a high-pass filter and/or an edge recognition method in conjunction with a light-intensity filtering procedure, using at least one processor (44, 46), - identifying at least one sparkle point within a respective image, - implementing a features analysis of the at least one identified sparkle point in the respective image in respect of at least one predefined size feature, using the at least one processor (44, 46), - determining at least one value for the at least one predefined size feature for the at least one sparkle point, - calculating a size distribution for the respective image based on the determined value for the at least one predefined size feature, using the processor (44, 46), wherein a correlation is derived for at least one toner with the determined value for the at least one predefined size feature of the at least one sparkle point, the correlation indicating a contribution of the at least one toner to the size distribution of the at least one sparkle point, more particularly of two or more identified sparkle points in the respective image, and is used in order to adapt a quantity for the at least one toner, to be specified when providing a formulation, to the calculated size distribution of the at least one sparkle point, - providing a formulation for a coating which is identical or at least similar in appearance to the target coating (43, 130), taking account of the calculated size distribution and using the processor (44, 46), wherein the provision of the coating formulation comprises the provision of a list of toners together with quantity and/or concentration data.