System and methods for color matching overprinted documents

A method for color matching an overprinted graphic document for a target device, the method comprising:

• obtaining an overprinted graphic document comprising a plurality of graphic elements, each of the graphic elements comprising at least one color;
• examining the plurality of graphic elements to identify at least one overprint region, the overprint region corresponding to an area wherein a plurality of contributing graphic elements overlap, wherein each contributing graphic element contributes at least some color to the overprint region;
• selecting an overprint graphic element type from a plurality of graphic element types;
• creating at least one overprint graphic element of the overprint graphic element type that paints in the corresponding overprint region;
• establishing at least one color for the overprint graphic element;
• creating a modified document by adding the at least one overprint graphic element to the overprinted graphic document;
• producing a color-matched document by transforming at least one color in the modified document to a target color;
• and
• wherein transforming at least one color in the modified document to a target color comprises, for a color, changing a color space of the color and at least one colorant value of the color based on transformation information associated with the color space of the color and a color space of the target color.

A method for color matching an overprinted graphic document for a target device, the method comprising:

• obtaining an overprinted graphic document comprising a plurality of graphic elements, each of the graphic elements comprising at least one color;
• examining the plurality of graphic elements to identify at least one overprint region, the overprint region corresponding to an area wherein a plurality of contributing graphic elements overlap, wherein each contributing graphic element contributes at least some color to the overprint region;
• selecting an overprint graphic element type from a plurality of graphic element types;
• creating at least one overprint graphic element of the overprint graphic element type that paints in the corresponding overprint region;
• establishing at least one color for the overprint graphic element;
• creating a modified document by adding the at least one overprint graphic element to the overprinted graphic document;
• producing a color-matched document by transforming at least one color in the modified document to a target color;
• and
• wherein transforming at least one color in the modified document to a target color comprises, for a color, performing no transformation if the color is defined in a target color space.

A method for color matching an overprinted graphic document for a target device, the method comprising:

• obtaining an overprinted graphic document comprising a plurality of graphic elements, each of the graphic elements comprising at least one color;
• examining the plurality of graphic elements to identify at least one overprint region, the overprint region corresponding to an area wherein a plurality of contributing graphic elements overlap, wherein each contributing graphic element contributes at least some color to the overprint region;
• selecting an overprint graphic element type from a plurality of graphic element types;
• creating at least one overprint graphic element of the overprint graphic element type that paints in the corresponding overprint region;
• establishing at least one color for the overprint graphic element;
• creating a modified document by adding the at least one overprint graphic element to the overprinted graphic document;
• wherein establishing at least one color for the overprint graphic element comprises, for an overprint color:
• establishing an overprint color space based on a plurality of color contribution rules in conjunction with the plurality of contributing graphic elements;
• and
• establishing at least one overprint colorant value by combining a plurality of contributing colors from the plurality of contributing graphic elements based on a plurality of color contribution rules.