Hewlett-packard Development Company, L.p.

Mary Nielsen

Orhan E Beckman

Robert D Walton

Michael Stokes

Timothy E Stefl

Denise Zimmerman

Huanzhao Zeng

A method for automatically generating a color separation at a digital press comprises defining a color ink array of n-color inks. A separation model is constructed at the digital press based on parameters of the digital press and ink parameters of each of the n-color inks. The constructed separation model is applied to an input digital file to enable printing an element of the input digital file using the n-color inks.

Dynamic color separation at a digital press

A method is provided for adjusting color output in a digital press. The method comprises providing a digital press including a output color ink array configured to print a first spot color element on a media and including an input color array including a process color subarray and at least one custom color input. The first spot color element is printed on the media from the digital press via a spot color simulation of the at least one custom color input using the output color ink array. The first spot color element is adjusted by modifying, at the digital press, the at least one custom color input without adjusting the process color subarray of the input color array.

Spot color adjuster

A system and method for determining composite grays using device values. Device values are received from image data on which color separation was performed. Gray component replacement are determined on black point device values by using target lightness values, target chromaticity values, and target black device values. A printing device and a computer readable media having computer instructions for implementing the method of determining composite grays are also provided.

Determining composite grays

The method of the invention adaptively assigns an image data color management action to a component of a computing system. The computing system includes control programs such as an application program and a peripheral driver program. The computing system further includes a peripheral device that may have both software color management capability and hardware color management capability. The method of the invention initially examines received image data to determine at least one characteristic thereof. The method then compares the characteristic with one or more decision parameters that enable an assessment of the complexity of the color management actions required for the image data. Thereafter, based upon the result of the comparing action, the image data is subjected to a color management action by a selected one of the control programs or by the peripheral device, dependent upon the determined complexity of the image data.

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Eagle, ID, United States of America

Mary Nielsen