Simulated paper texture using glossmark on texture-less stock
AssigneeXerox Corporation
InventorsMu Qiao, Marc Rene, William A. Fuss, Shen-ge Wang, Paul Conlon
Life of this patent
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Abstract
A method for simulating a textured appearance on a uniform substrate includes using variable halftone dot orientations. A texture description is provided for generating electronic data representing a three-dimensional texture. Texture regions of the texture description are identified using pixel cells in the electronic data. Halftone dot orientations are assigned for each pixel cell based on a value of the pixel cell. The halftone dot orientation represents a recessed or a raised surface portion.
Claims16
A method for simulating a texture on a uniform substrate, comprising:
- providing a first texture description for generating electronic data representing a three-dimensional texture, including:
- mapping the electronic data to an L*a*b* color space,
- determining a luminance value between 0 and 255 for each pixel cell,
- determining a difference between a maximum and a minimum luminance value for providing a partial dynamic range,
- enhancing the partial dynamic range to a full dynamic range, and,
- computing a halftone dot orientation for the each pixel cell based on the luminance value;
- concatenating a print instruction for the first texture description with a print instruction for at least one primary image to form a textured image description;
- and,
- rendering toner at variable halftone dot orientations to a surface portion of a generally uniform substrate for producing the primary image having a perceived textured, wherein each orientation rendered for a pixel on the surface portion represents a certain height of the three-dimensional texture.
A method for simulating a textured appearance on a uniform substrate, comprising:
- providing a texture description for generating electronic data representing a three-dimensional texture;
- identifying texture regions of the texture description using pixel cells in the electronic data, including:
- mapping the electronic data to an L*a*b* color space,
- determining a luminance value between 0 and 255 for each pixel cell,
- determining a difference between a maximum and a minimum luminance value for providing a partial dynamic range,
- enhancing the partial dynamic range to a full dynamic range, and,
- computing a halftone dot orientation for the each pixel cell based on the luminance value;
- assigning at least two halftone dot orientations to the pixel cells for representing raised and recess texture regions, each halftone dot orientation representing a certain height of the three-dimensional texture;
- and,
- generating a print instruction rendering toner at the at least two halftone dot orientations to a surface portion of a generally uniform substrate for producing a primary image having perceived texture portions.
A system for formulating an output having a simulated texture, comprising:
- a textured image source adapted to provide an original texture description representing a three-dimensional texture;
- a processor adapted to identify texture regions of the original texture description using pixel values, the processor being further adapted to associate a variable halftone dot orientation for each pixel cell of the original texture description by determining a luminance value between 0 and 255 for each pixel cell in the original texture description, determining a difference between a maximum and a minimum luminance value for providing a partial dynamic range, enhancing the partial dynamic range to a full dynamic range, and, computing a halftone dot orientation for the each pixel cell based on the luminance value, wherein each orientation represents a certain height of the three-dimensional texture;
- and,
- an image forming apparatus adapted to render an image having perceived texture portions on a substrate surface by applying a pigmented toner layer to the surface at the variable halftone dot orientations.
Dependencies are inferred from the claim text.