Abstract: A system and method for handling overprinting in generating a raster page for continuous tone or halftone printing. A color transformation is used to generate tints for each of the colorants for each of the colored shapes. When rendering a shape that is set for overprinting, the tints of colorant for each pixel is determined by comparing the colorant tints determined by the color transformation of the foreground shape with the colorant tints previously determined for the pixel according to the background. The pixel colorant tints are reset with the colorant tints of the foreground shape when the tints of the foreground shape are darker than the tints of the background. Where the tints of the foreground shape are lighter than the background, the background tints are left unchanged producing a transparency effect. The system and method are adaptable to colored shapes comprising a vignette. The system and method are also applicable to negative image production.

Abstract: A system for processing images includes an image file subsystem providing a source signal representing an input image; a color transformation subsystem coupled to the image file subsystem and accepting as input the source signal and producing a target signal therefrom, and an image forming subsystem coupled to the color transformation subsystem and forming a physical manifestation of the input image in response to the target signal, the color transformation subsystem being configured to establish a memory “cube” area representative of possible source signals, to define a sub-cube portion of the memory area as representative of the source signal; to determine possible target signals corresponding to the sub-cube portion; and to determine the target signal responsive to the possible target signals. If interpolation is found to be accurate for a mini-cube portion of the sub-cube, truncation or interpolation are used to derive the target signal; otherwise, the target signal is determined directly.

Abstract: A system for processing images includes an image file subsystem providing a source signal representing an input image; a color transformation subsystem coupled to the image file subsystem and accepting as input the source signal and producing a target signal therefrom, and an image forming subsystem coupled to the color transformation subsystem and forming a physical manifestation of the input image in response to the target signal, the color transformation subsystem being configured to establish a memory "cube" area representative of possible source signals, to define a sub-cube portion of the memory area as representative of the source signal; to determine possible target signals corresponding to the sub-cube portion; and to determine the target signal responsive to the possible target signals. If interpolation is found to be accurate for a mini-cube portion of the sub-cube, truncation or interpolation are used to derive the target signal; otherwise, the target signal is determined directly.