Abstract: A method for modifying a transformation from a first space to a second device dependent colorant space of a second color reproduction device, wherein the first space is selected from the group of a first device dependent colorant space of a first color reproduction device and a first device independent color space, the method including (a) selecting a first point in the first space; (b) applying the transformation to the first point, thus obtaining a target value in the second device dependent colorant space; and (c) correcting the target value, thus modifying the transformation, wherein the correction of the target value is based on a measured value of a color patch, reproduced on the second color reproduction device for a second point in the second device dependent colorant space, wherein the second point is (i) a point around the target value and different from the target value, or (ii) the target value.

Abstract: A method for making a dot for dot proof for a printing device, such as a press, on another device, such as a proofer, the method including (a) inputting, at pixel level, binary or pseudo-binary data indicating at a given pixel screened colorant values of the printing device; (b) inputting contone colorant values of the printing device indicating a color in a neighborhood of the given pixel; (c) outputting colorant values for the other device at the given pixel, based on the input contone colorant values and on the input binary or pseudo-binary data, such that a color match is obtained with a given color behavior of the printing device.

Abstract: A method for processing a digitized continuous tone image for reproducing the image by a printing device, including (a) inputting a tone value of an input pixel of the image; (b) applying a plurality of levelsplit curves to the tone value, thus obtaining a plurality of level values, wherein each specific levelsplit curve of the curves corresponds to a level defined by (i) a combination of a dot density and a dot area; or (ii) an overlap of a plurality of such combinations; (c) inputting the plurality of level values to an error diffuser for obtaining an output pixel value for reproducing the image; wherein a fraction of the output pixels to be filled by an overlap of levels depends on the level values and is independent of the error diffuser