Abstract: A digital printer is equipped with a built-in color measurement device in the form of a colorimeter or spectral photometer, as well as with color management support. The built-in color measurement device is used for control and optimization of the print output, especially for the simplification, optimization and automation of the work processes and for the verification of the output results.

Abstract: A system and method are provided for producing a color palette including a multitude of color patterns for a predetermined coloring process with a multitude of defined base colors and for a predetermined substrate. The individual color patterns are systematically, especially equidistantly, defined in a mathematically defined color space by the way of color coordinates describing the color space. The spectrum of the color pattern is synthesized by calculation for each color pattern in the color space by way of a color mixing model representing the predetermined coloring process and the predetermined substrate, whereby that spectrum is selected having the highest color constancy. The spectra synthesized by calculation are stored in relation to the color coordinates of the underlying color patterns. Through use of a mathematical/physical basis (such as the CIE-system), it is possible to define a visually equidistant color space and assign a spectral curve to individual points having the best color constancy.

Abstract: A digital color document is generated or processed on a first computer by way of a color management enabled graphics application, by using a monitor-profile. The digital data of the color document are packed together with the underlying monitor-profile into a digital container document and transmitted to a second computer. The container document is unpacked in the second computer, whereby the data of the color document and the underlying monitor-profile are recovered. The unpacked monitor-profile is compared with a local monitor-profile active in the second computer and the comparison outcome is displayed on the monitor of the second computer.

Abstract: A method for optimizing a digital document having special colors, the digital document serving as an original in a reproduction process, especially a printing process, the method includes storing data corresponding to special colors, with the goal of a true-color reproduction in the reproduction process; examining the digital document for the presence of special colors; and replacing any of the special colors present in the document by replacement colors with standard color definitions using the stored data. The definitions for the replacement colors can be manually input, selected from a color library, or determined by color measurement on a physical color reference.

Abstract: A digital printer is equipped with a built-in color measurement device (6) in the form of a colorimeter or spectral photometer, as well as with color management support. The built-in color measurement device (6) is used for control and optimization of the print output, especially for the simplification, optimization and automation of the work processes and for the verification of the output results.

Abstract: A method for generating a digital color standard system for the generation and reproduction of standardized colors is provided, wherein a color spectrum is divided into a plurality of discrete spectral color values with predetermined gaps and the discrete spectral color values are digitized in order to be processed in accordance with the color standard. A computer system for for generating a digital color standard system for the generation or reproduction of standardized colors is also provided. The computer system includes a processor that is programmed to (i) divide a color spectrum into a plurality of discrete spectral color values with predetermined gaps between at least some of the discrete spectral color values, (ii) digitize the discrete spectral color values; and (iii) process the digitized color values. A data carrier is also providing for receiving color data that may be generated according to the foregoing method and/or using the foregoing computer system.

Abstract: A device (strip reader) for an automatic photoelectric measurement of measuring fields contained on a sheet or strip-shaped, opaque or transparent original comprising a housing, transport members for automatically pulling the original into the housing and for transporting the original along a transport path, and a spectrophotometric measurement arrangement as well as a controller in co-operation with the transport members and the measurement arrangement. The measurement arrangement is adjustable in a direction transverse to the transport direction and illuminates the measuring fields provided on the original with light of a defined quality, and receives the light remitted or transmitted from the measuring fields in dependence upon the original and converts this measuring light into electrical signals representing the spectra of the measuring fields.

Abstract: In an edition printing process, digital master image data are provided in a pre-printing stage, digital printing data are produced from the master image data, measurement positions and nominal color values in those measurement positions are determined, and the digital printing data as well as the measurement positions and nominal color values are transmitted to the print shop through a data channel. Printing plates are produced in the print shop on the basis of the digital printing data and the edition printing carried out in a printing machine by way of the printing plates. Test image data are thereby produced by image wise colorimetric measurement of one or more edition printing specimens by way of a preferably spectral color measurement system, and used for the color control of the printing machine together with the nominal color values. The test image data produced in the print shop are transmitted through a data channel to the pre-printing stage and there evaluated for quality control.

Abstract: A system and method are provided for producing a color palette including a multitude of color patterns for a predetermined coloring process with a multitude of defined base colors and for a predetermined substrate. The individual color patterns are systematically, especially equidistantly, defined in a mathematically defined color space by the way of color coordinates describing the color space. The spectrum of the color pattern is synthesized by calculation for each color pattern in the color space by way of a color mixing model representing the predetermined coloring process and the predetermined substrate, whereby that spectrum is selected having the highest color constancy. The spectra synthesized by calculation are stored in relation to the color coordinates of the underlying color patterns. Through use of a mathematical/physical basis (such as the CIE-system), it is possible to define a visually equidistant color space and assign a spectral curve to individual points having the best color constancy.

Abstract: A processor controlled measuring device, especially a colour meter or a spectrophotometer, includes a measuring unit, unit detects the parameters to be measured and converts them into corresponding electrical signals, a control arrangement cooperating with the measuring unit, which controls the measuring unit and processes the electrical signals produced thereby, and an input/output unit cooperating with the control arrangement for the manual operation of the measuring device and for the display of measurement results and user instructions. The control arrangement is provided by a processor on which a control program runs which implements the functionalities of the measuring device. Furthermore, an interface is provided which cooperates with the processor and through which the processor can communicate with an external processor, whereby measured data produced by the measuring device can be called up therefrom and control data controlling the processor can be fed to the processor.

Abstract: A color information file is produced in a processor for the communication of colors, which file can include all possible information data assigned to one or several color samples and identifying, characterizing or supplementing them. The information data are stored as data objects in the data information file in an open and expandable hierarchically organized object structure on XML basis in text format. By embedding the data objects in an XML container, it is possible to characterize color samples by way of arbitrary and different combination of information data and to selectively add complementary image or text information. The color information file is produced with the help of a text editor or a composer software, for example with graphic user interface. A viewer software is provided for the reading of the color information file and for interpretation of the information data stored therein.

Abstract: The invention relates to the use of a spectrophotometer connected with a computer to measure and store a solid color atlas in the computer. The halftone percentage values necessary for the adjustment of a given color are calculated by determining the desired color coordinates of the color involved and entered into the computer. The latter calculates from them, using the stored color atlas and a regression method, the halftone percentage values sought. In the process, with the aid of printing characteristics, stored color adaptations to prevailing printing conditions can be brought up to date without the need for the preparation of a new solid color atlas.

Abstract: A computer-controlled device for detecting optical transmission and/or remittance properties of a measuring object has a measuring unit for illuminating the measuring object and for receiving the light transmitted by the measuring object and/or reflected from the measuring object. Furthermore, it has an input unit for selecting the type of measurement and the like, as well as a display unit for displaying the values measured. Moreover, it comprises a first non-volatile memory in which the measuring functions of the device are stored, as well as a control unit for controlling all procedures in the device. In a second non-volatile memory are stored release codes assigned to the individual measuring functions and, with the help of which, the control unit accesses the measuring functions in the first non-volatile memory.

Abstract: A measuring device, designed as a hand-held device, is disclosed, having a housing, an optical measuring head movably arranged in the housing for charging a test object with measuring light and for collecting light reflected by the test object, an opto-electric converter for converting the collected light into electrical signals, a computer processing the electrical signals and controlling the device, a display for displaying the measurement values obtained from the processing of the electrical signals and operating members working with the computer for controlling the device functions. Upon a triggering of the measuring process, the measuring head is moved, by a motor controller by a computer, out of a rest position into a measuring position and back into the rest position. A calibrating position is provided, in the housing, into which the measuring head can be moved and in which a calibration test object is disposed.

Abstract: The invention relates to the use of a spectrophotometer connected with a computer to measure and store a solid color atlas in the computer. The halftone percentage values necessary for the adjustment of a given color are calculated by determining the desired color coordinates of the color involved and entered into the computer. The latter calculates from them, using the stored color atlas and a regression method, the halftone percentage values sought. In the process, with the aid of printing characteristics, stored color adaptations to prevailing printing conditions can be brought up to date without the need for the preparation of a new solid color atlas.