Abstract: A method of characterizing a color imaging system is provided. The method comprises obtaining first data indicative of output of the color imaging system. The first data is processed, to yield second data, according to a color appearance model that varies in accordance with neutrality of colors indicated by the first data. Other methods are provided as well as systems and computer program products for characterizing color imaging systems and devices and for producing colors.

Abstract: In one embodiment, a display device includes an integrated color matching processor that processes color data to facilitate accurate color rendering on the display device. The integrated color matching processor can be internal to the display device or external to the display device. Either way the processor may receive color input, process the color input, and output altered color image data to the display.

Abstract: In one embodiment the invention comprises a display device including at least one illuminant condition sensor. The illuminant condition sensor can provide feedback to the display device regarding the illuminant conditions surrounding the display. Alternatively, the output of the illuminant condition sensor can provide input to a color management module. Either way, illuminant condition information can be provided so that the display device renders color in a manner that accounts for illuminant conditions.

Abstract: In one embodiment, raster image data of an image including pixel intensity, pixel color, or the like, can be varied slightly to encode color profile data within the image without significantly altering the visual appearance of the image. The encoded data may represent color profile data for a source device, and can be extracted by a destination device for use in performing color transformations for improved color image accuracy.

Abstract: A color imaging technique includes setting a target value in a device-independent first color space and mapping the target value to a substantially complete point set in a second color space. The point set may include a plurality of points, each of which define substantially the same colorimetric value via a unique combination of colorants. After mapping the target value to a substantially complete point set, a point may be chosen. Moreover, after choosing a point in the point set, device-dependent colorant values defined by the point may be determined. In this manner, the invention may provide control over the colorants that are used to image a particular color.

Abstract: A color mapping method is used in transforming colors between color imaging systems. The method includes using forward transformation profiles that characterize the color imaging systems to generate respective sets of device-independent color values for the color imaging systems. Color conversions are calculated by reducing differences between the respective sets of device-independent color values. Based on these color conversions, a color map is constructed that describes a relationship between the color imaging systems.

Abstract: Arrangements and methods characterize the calorimetric response of a display device. These arrangements and methods use an analytic model selected based on the type of the display device to characterize the calorimetric response of the display device. A lookup table compensates for individual characteristics of the particular display device by receiving a set of indices and providing a set of adjusted values as inputs to the analytic model.

Abstract: A color mapping method is used in transforming colors between color imaging systems. The method includes using forward transformation profiles that characterize the color imaging systems to generate respective sets of device-independent color values for the color imaging systems. Color conversions are calculated by recursively reducing differences between the respective sets of device-independent color values. Based on these color conversions, a color map is constructed that describes a relationship between the color imaging systems.

Abstract: A method for characterizing a halftone printer uses a reduced number of test patches to simulate the printing characteristics over the printer's full range of realizable color combinations. The method involves obtaining a set of color values from each of a limited number of test patches. Substantially fewer test patches are used than are necessary to adequately sample a full range of realizable color combinations. The method also involves constructing a halftone printer model using at least one device spot size parameter, the sets of color values, and a set of addressable units corresponding to device spot locations on a medium. Each addressable unit is smaller than a device spot. A set of color separations representing a page of color samples spanning the full range is generated.

Abstract: A system and method for representing a multi-color, halftone image on a multi-color, continuous-tone device can be configured to employ an approximation technique for determining areas of overlap regions produced by adjacent device spots in a printed halftone image based on a halftone device model. The approximation technique enables consideration of the effects of a variety of halftone device characteristics such as addressability, device spot size, and color values on the appearance of a printed halftone image. The system and method can be configured to employ the approximation technique in a manner that also enables consideration of the effect of misregistration between color separations on the appearance of a printed halftone image. As an alternative, the system and method can be configured to employ a geometrical abstract that effectively centers device spots on the corners of addressable units.