Abstract: A color reproduction system comprises a color imaging output device (e.g., monitor, printer, etc.) and its device characterization (e.g., ICC profile, device link, etc.). A method for assessing the capability and accuracy of a color reproduction system is presented. This method may be used to assess the fit between a color reproduction system and its intended use (e.g., proofing, production, etc.). In addition, it may be used to monitor the color accuracy of a color reproduction system over time, thus informing users of the need to recalibrate and/or recharacterize the system.

Abstract: A color reproduction system comprises a color imaging output device (e.g., monitor, printer, etc.) and its device characterization (e.g., ICC profile, device link, etc.). A method for assessing the capability and accuracy of a color reproduction system is presented. This method may be used to assess the fit between a color reproduction system and its intended use (e.g., proofing, production, etc.). In addition, it may be used to monitor the color accuracy of a color reproduction system over time, thus informing users of the need to recalibrate and/or recharacterize the system.

Abstract: A system is described that uses [device>PCS] transformations for a source and destination device along with user preference information to create a composite [device>device] transformation which is used to convert a color in a source space from a source device into a color in a destination space provided to a destination device. The user preference information can be a default or extracted from an image or from the profiles involved or from a GUI. The system modifies the domain of the [device>PCS] transform from a destination device profile through the use of an ink manifold such that there are three input dimensions. The inking manifold can be an identity transform. The system also modifies the range of the [device>PCS] transform from a source device profile such that the PCS coordinates are all within the range of the modified [device>PCS] transform. The modified destination transform is inverted for values in the source transform domain to produce the [device>device] transform.

Abstract: A system is disclosed that uses input and output color space identifiers and other information about the transforms to automatically determine a size and a class of identity function composite tabular function. The identity function is constructed. The identity function is composed with input and output composite tabular functions to form a net composite tabular function. The identity function is selected based on the characteristics of the input and output spaces, color space, and transform shape. The size of the identity function is determined by the maximum size of the color space functions and the interval spacing that needs to be maintained for the net function.

Abstract: The output response of an image processing system having a color printer and a color printer characterization is linearized by printing a target image having target patches of differing color densities. After measuring printed patches, a calibration transform is generated that incorporates the relationship between requested and measured color densities. The calibration transform is then composed with the characterization, calibrating the printer characterization.

Abstract: A system that combines a reference color image with a color move tracer image creating a combined image capable of being edited as desired by the operator and one which records the actual color edits made on the reference image. The tracer is a color grid that represents the domain of colors in a specified color space encoding. The grid is converted into a color edit transform table and the color edits within the color space on a higher resolution version of the reference image, or on other images, can be performed using a table look-up operation. The invention can also be used to capture effects transforms that modify the input/output and/or screen display of an image without necessarily modifying the original image.

Abstract: A method and apparatus for generating a modified electronic image combines multiple image transforms into a single composite transform, and then modifies the electronic image in accordance with the composite transform. The composite transform includes sample values sequentially modified in accordance with each of the multiple image transforms being combined. The method and apparatus further provides a user interface allowing a user to select individual transforms for composition. The use of a composite transforms allows a user to interact with the image processing system more quickly and interactively while obtaining a desired modified image.

Abstract: A method for communicating a transform definition to a destination device. The transform definition outputs image parameter data based on input image data and has a channel corresponding to each output image parameter. Each channel has at least one input table, an output table and a grid table representing an input/output relation of an image transformation. The destination device is provided with: identification data identifying the communication as that of a transform definition; version data for distinguishing the transform definition from other versions of the transform definition; size data specifying a size of one of the grid table's dimensions for each channel's grid table; with input table, output table, and grid table data of any input, output, and grid table which is shared by a plurality of channels; and with input table, output table and grid table data of any private input, output, and grid tables.

Abstract: An arrangement for producing electrophotographic reproductions of an original image, including a source of digitized data that digitally represents an original image, a photocopier having determinable reproduction characteristics and which produces electrophotographic reproductions, and a printer. The printer is coupled to the source that receives the digitized data and produces an optical intermediate from the digitized data. This optical intermediate compensates for the determinable reproduction characteristics of the photocopier and of the scanner such that photocopying of the optical intermediate by the photocopier produces an accurate electrophotographic reproduction of the original image. The printer is provided with a composite device function table that relates target image pixel values used by the printer to measured color data of the output of the photocopier.