Abstract: The present invention is a system and method for improved rendering of color images, such as by more accurately and/or desirably matching printed outputs to CRT monitor color graphics. A hue rotation system is employed to improve color rendering.

Abstract: A system for reducing toner or ink consumption in rendering images, in which a transfer function is used to modify screening of the image to be rendered. Rendering systems including the use of single or multiple colors can employ the present invention. An algorithm is used in the present system to read in an arbitrary halftone dot and for each pixel in the halftone cell the output is a replicate of the threshold, Ta or Tb, surrounded by three pixels of white thresholds, a smooth transition from white to the now reduced maximum area coverage (such as 25%), while creating or maintaining the appearance of image uniformity at this reduced maximum area coverage.

Abstract: A method and system for determining an equal amount of a plurality of color densities to be removed in rendering a multicolor image using a black toner and the plurality of colored toners. The rendering of the multicolor image is executed with a multicolored digital inputs according to undercolor removal techniques. The includes providing a black toner coverage bit count and a total colored toner coverage bit from a plurality of colored toners (often cyan, magenta and yellow) to be used in rendering the multicolored image. The black toner and colored toner coverage estimations are summed; if this sum exceeds a predetermined maximum total toner density level, an equal amount R of toner to be removed from each colored toner separation is determined by subtracting the predetermined maximum from the sum of the black and colored toner estimations, and then dividing the result by the number of colored toner used to produce gray (again, usually 3-cyan, magenta and yellow).

Abstract: A system for reducing toner or ink consumption in rendering images, in which reduced slope tone reproduction curve(s) is/are used to render images. Rendering systems including the use of single or multiple colors can be employed.

Abstract: A system for reducing toner or ink consumption in rendering images, in which reduced slope tone reproduction curve(s) or other draft/clip mode toner consumption reduction systems to render images on an object-oriented basis are used. Rendering systems including the use of single or multiple colors can be employed.