Abstract: A method and apparatus to predict the color of an overprint of a set of colorants at a set of respective coverage percentages on a substrate of a substrate type using a printing technique. The colorants include some for which a device profile is provided. The method includes determining the colorant parameters of the device profile colorants; determining the spectrum of the substrate, providing spectral colorant parameters for the non-device profile colorants, and determining the color of the overprint. One version including modifying the data of the device profile such that the colorant parameters determined in the step of determining colorant parameters determines the colorant parameters of modified colorants that match the color of the device profile colorants and that cover at least the gamut of the device profile colorants.

Abstract: A method, apparatus, and product to generate trap areas. One embodiment is a method for generating a trap pixel of a trap area surrounding one or more trapping edges of an image that includes, for each trapping edge in the image, and for each pixel within a predefined area around the trapping edge, comparing the distance of the pixel from the trapping edge according to a distance measure with a provided measure indicative of the distance of the pixel from any edge of the image to determine if said each pixel is closer to the trapping edge than to another edge. The method further includes, if said pixel is closer to said edge than to any edge, setting the pixel as a trap pixel of the trap area, including setting a trap color for the trap pixel.

Abstract: A method and apparatus to predict the color of an overprint of a set of colorants at a set of respective coverage percentages on a substrate of a substrate type using a printing technique. The colorants include some for which a device profile is provided. The method includes determining the colorant parameters of the device profile colorants; determining the spectrum of the substrate, providing spectral colorant parameters for the non-device profile colorants, and determining the color of the overprint. One version including modifying the data of the device profile such that the colorant parameters determined in the step of determining colorant parameters determines the colorant parameters of modified colorants that match the color of the device profile colorants and that cover at least the gamut of the device profile colorants.

Abstract: A method, apparatus, and product to generate trap areas. One embodiment is a method for generating a trap pixel of a trap area surrounding one or more trapping edges of an image that includes, for each trapping edge in the image, and for each pixel within a predefined area around the trapping edge, comparing the distance of the pixel from the trapping edge according to a distance measure with a provided measure indicative of the distance of the pixel from any edge of the image to determine if said each pixel is closer to the trapping edge than to another edge. The method further includes, if said pixel is closer to said edge than to any edge, setting the pixel as a trap pixel of the trap area, including setting a trap color for the trap pixel.