Patent ID: 7990574

Claim:
A method for converting a document including vector graphic elements, the method comprising: obtaining an ordered list of graphic elements from the document; selecting an element from the list; removing the selected element from the list; adding at least one replacement element for the selected element wherein adding includes: configuring the at least one replacement element with the same geometry and position as the selected element; configuring transparency attributes associated with the at least one replacement element; creating a replacement document based on the modified list; wherein selecting comprises selecting an element configured to overprint in a subtractive color space; wherein selecting comprises selecting an element configured to paint opaquely; and wherein adding the at least one replacement element comprises: configuring a first replacement element to paint a zero value for a colorant wherein the selected element is configured to paint a non-zero value for the colorant; configuring the first replacement element with a lighten transparency blend mode; configuring a second replacement element to paint the same colorant values as the selected element; configuring the second replacement element with a darken transparency blend mode; and configuring the second replacement element to paint after the first replacement element.