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A method and apparatus for encoding artistic design intent information, for use when rendering or re-rendering images purposed for an original printing system, to print on severely different printing systems

IP.com Disclosure Number: IPCOM000019199D
Publication Date: 2003-Sep-03
Document File: 6 page(s) / 71K

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention offers a simple mechanism for communicating the artistic aims of the graphic designer from a design phase of a graphic arts workflow, to the automated processes of an output phase of a graphic arts workflow. This encoded information might then be used by any display or print rendering processes that deal with the images as they are incorporated into documents and printed. The encoded information might be associated with an image that has been previously rendered to a particular printing system, or might be associated with an image that has not yet been rendered for output. In either case the encoded design intent information can be used to configure the operational parameters of image and line art rendering processes.

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A method and apparatus for encoding artistic design intent information, for use when rendering or re-rendering images purposed for an original printing system, to print on severely different printing systems

The graphic arts industry today is in transition with respect to encoding practices for digital images. In traditional graphic arts workflows, each image is digitized and encoded appropriately for a particular printing system. The artistic intent of the graphic designer is inextricably encoded with the image rendering necessitated by that targeted output system. When those images are printed, acceptable image appearance can be achieved when the actual printing system is consistent with the printing system targeted by the graphic designer.

However, due to the multi-media and POD transitions in the graphic arts industry, the actual printing system can be severely different from the printing system targeted by the graphic designer. No encoded mechanism is currently available to inform the re-render process regarding the artistic design intent, hence when the actual printing system is severely different from the printing system targeted by the graphic designer, printed image appearance can arbitrarily diverge from the graphic designers artistic intent. The same issues can occur with color (multi-channel) line art data.

The invention offers a simple mechanism for communicating the artistic aims of the graphic designer from a design phase of a graphic arts workflow, to the automated processes of an output phase of a graphic arts workflow. This encoded information might then be used by any display or print rendering processes that deal with the images as they are incorporated into documents and printed. The encoded information might be associated with an image that has been previously rendered to a particular printing system, or might be associated with an image that has not yet been rendered for output. In either case the encoded design intent information can be used to configure the operational parameters of image and line art rendering processes.

The global (pertaining to an entire image object or vector data object [image objects and vector data objects are hence jointly referred to as color objects]) parameters that can affect color object appearance, and can be arbitrarily altered when re-rendering color objects to a printing system that is severely different from the printing system targeted by the graphic designer include:

  1. Gamut mapping
  2. Tone behavior
  3. Separation behavior
  4. Printer ink limit constraint
  5. Printer dot gain constraint

Each of these global parameters corresponds to a degree of freedom (or constraint) in the artistic design process pertaining to that color object. Hence each of these global parameters can be considered as a dimension in an artistic intent design space (i.e., each of these global parameters is an artistic intent dimension).

The gamut mapping dimension contains the sub-dimensions of hue, colorfulness, and lightness....