Abstract: The invention includes a method for the computer-aided performance of color space transformations with high accuracy that provides a result which is as close as possible to the original. The source color space includes n colors, the target color space includes m values, and combinations of the m components of the target color space are assigned to at least some combinations of the n colors of the source color space via the transformation rule TRV.

Abstract: The invention includes a method for the computer-aided performance of color space transformations with high accuracy that provides a result which is as close as possible to the original. The source color space includes n colors, the target color space includes m values, and combinations of the m components of the target color space are assigned to at least some combinations of the n colors of the source color space via the transformation rule TRV.

Abstract: The invention includes a method for performing transformations of color data, where the results of a transformation rule TRV can be corrected to a verified nominal value data set of the m values of the target color space Z1, which is determined for a set of color data Q1, from the n colors of the source color space. A copy of Q1 is created as data set Q2. The set of color data Q2 is transformed using the provided transformation rule TRV and creates another data set of the m values of the target color space Z2. The data set Q2 is optimized and transformed back to Z2 until the differences between Z1 and Z2 are minimized. The difference between the original data set Q1 and the optimized data set Q2 and the optimized result Z2 and the target data set Z1 can be applied to the transformations of color data.

Abstract: The application is directed to a method for carrying out color space transformations where, despite the use of regular multidimensional tables with the highest possible accuracy, a high throughput is achieved in color transformations and, simultaneously, full control over the transformation in each color space is achieved. The method includes computer-aided execution of transformations of color data for a project from a source color space to a target color space using transformation tables based on a transformation rule where a multiplicity of input color data of the source color space are in each case assigned unambiguous output values of the target color space. The source color space includes n colors and the target color space includes m values. Values for the target color space are generated for all input color data of the project using the transformation tables and are available in a data set.

Abstract: The aim of the invention is to provide a method for estimating a spectral reflectance value to be expected of a layer system consisting of a layer sequence of materials and printing inks that involves reliably predicting the appearance of the desired print. This aim is achieved according to the invention by providing a method for estimating a spectral reflectance value to be expected of a layer system consisting of a layer sequence of materials and printing inks, in which: a) firstly the values are determined for each individual layer in relation to i) the spectral transmission at the interfaces of the layer, ii) the spectral reflectance at the interfaces of the layer, iii) the spectral absorption in the layer volume, and iv) the spectral scattering in the layer volume; b) a resulting reflectance value is ascertained from the determined values in relation to the layer sequence by following the various light paths in a sequential course through the layers.

Abstract: To improve a method for making an overprint prediction to that extent, that the method allows more reliable overprint predictions with a reduced effort, the invention proposes a method for making the overprint prediction for a color combination, in which method a printing substrate and at least two printing colors and one gradation of hue values per printing color including the full tone as well as color combinations are predefined as data of the hue value of the n printing colors, wherein first of all individual color predictions comprising three transmittance components and the associated transmittance spectra for the respective hue value are determined for each of the n printing colors, wherein for an intended color combination up to (3 to the power of n) combinations of the transmittance components and the associated combined transmittance spectra are determined, and an overall reflectance spectrum of an overprint is predicted on the basis of the determined transmittance components with their transmittanc

Abstract: To improve a method for making an overprint prediction to that extent, that the method allows more reliable overprint predictions with a reduced effort, the invention proposes a method for making the overprint prediction for a color combination, in which method a printing substrate and at least two printing colors and one gradation of hue values per printing color including the full tone as well as color combinations are predefined as data of the hue value of the n printing colors, wherein first of all individual color predictions comprising three transmittance components and the associated transmittance spectra for the respective hue value are determined for each of the n printing colors, wherein for an intended color combination up to (3 to the power of n) combinations of the transmittance components and the associated combined transmittance spectra are determined, and an overall reflectance spectrum of an overprint is predicted on the basis of the determined transmittance components with their transmittanc