Abstract:
A colorimeter for reading color bars (403, 404) of printed sheets (401) or the like includes a longitudinally extending base (400) including a paper stop (442) along which a sheet to be tested for color may be positioned. An autonomously operating colorimeter head (410) is moved along the base in a direction parallel to the edge of the sheet by means of an electric motor (600) mounted on the base and driving an helical thread lead screw (418) engaging an X-axis carriage supporting the head. The head is moved by operation of the lead screw in a direction parallel to the edge of the sheet, referred to as the direction of the X-axis. The head includes an electric motor and a Y-axis transport supporting an optics unit (510). The optics unit is moved within the head in a direction parallel to a Y-axis, extending perpendicularly to the X-axis.
Abstract:
A method for maintaining substantial reliability of color measurements obtained by a number of color measuring instruments includes by measuring color values of sets of working colors standards on the same instrument to determine calibration values. The working sets are provided to remote locations for use on remote instruments where they are measured on the remote instruments to obtain color measurements which are transmitted to the master lab. The measurements from the remote instruments are compared with the calibration values obtained on the master instrument to generate profiles which are provided to the remote labs. The profiles are applied to measured values for the set of working color standards to obtain corrected values. These values are transmitted to the master lab and analyzed to determine compliance with specifications.
Abstract:
Methods and apparatus are disclosed for correcting spectral measurements, such as are obtained by a spectrophotometer for measuring color. A single matrix is used that operates on a raw measurement vector (spectrum) to obtain a corrected spectrum. The matrix may embody a transform that minimizes the difference between the corrected spectra and a set of reference spectra. The difference may be characterized by a set of basis function weighting vectors which are then used to build the correction matrix. Correction of high resolution spectra (very long measurement vectors) is thereby allowed, without the large number of measurements that would normally be required. The reference spectra can be calibration data, or measurements made by another instrument which is desired to be stimulated.
Abstract:
A method for maintaining substantial reliability of color measurements obtained by a number of color measuring instruments includes by measuring color values of a set of master color standards 16 on a master color measuring instrument 14 at a master color lab 10 and measuring color values of sets of working color standards 26 on the same instruments to determine calibration values. The working sets are provided to remote locations for use on remote color measuring instruments 24 and the working sets are measured on the remote color measuring instruments 24 to obtain color value measurements which are transmitted on the master color lab 10. The measurements from the remote instruments 24 are compared with the calibration values obtained from measurements on the master instrument 14 to generate profiles 28 which are provided to the remote color labs 20. The profiles 28 are applied to measured color values for the set of working color standards 26 to obtain corrected color values. These values are transmitted to the master color lab and analyzed to determine compliance the specifications as to permissible deviations.
Abstract:
An improved spectrophotometer for non-contact measuring of the colors of colored target areas, especially, test patches on moving printed test sheets in an unrestrained normal output path of a color printer, which test patches may be sequentially angularly illuminated with multiple different colors, with a photosensor providing electrical signals in response, the spectrophotometer having a lens system for transmitting that reflected illumination from the test patch to the photosensor with a lens magnification ratio of approximately one to one. The exemplary spectrophotometer provides non-contact color measurements of moving color target areas variably displaced therefrom within normal paper path baffle spacings, with a displacement insensitivity of at least 6 millimeters about a nominal target to spectrophotometer separation.
Abstract:
A system for, and method of, colour matching and/or identifying colour parameters of articles such as teeth, textiles, paints, dyes, car body repairs, picture restoration, metals and gems and for use in the cosmetics industry. The system comprises means for taking a coloured image of an object, means for relaying the coloured image to a place remote from where the image of the object was taken, means for analysing colour values of the image and means for converting the colour values into parameters from which the original colour of the object can be reconstituted or colour parameters may be cross-referenced and/or recorded over time.
Abstract:
Zur optischen Markierung des von einem Farbmessgerät (101) auf einer Messfläche (103) erfassten Zielbereichs (104) wird mittels einer von einem Rechner (102) gesteuerten Anzeigeeinrichtung (100) auf der Messfläche (103) ein zweidimensionales Farbmuster (106) dargestellt, welches in jedem Punkt einen einmaligen eindeutigen Farbwert aufweist. Das Farbmessgerät (101) wird auf die Messfläche (103) gerichtet und der Farbwert des vom Farbmessgerät erfassten Zielbereichs (104) wird gemessen. Aus dem gemessenen Farbwert werden die Koordinaten des Zielbereichs (104) auf der Messfläche (103) berechnet und an dem durch die berechneten Koordinaten des Zielbereichs gegebenen Ort der Messfläche (103) wird eine optische Marke (105) dargestellt, welche die Lage des Zielbereichs (104) auf der Messfläche (103) visualisiert.
Abstract:
A color measurement system includes a measurement patch (200) utilizable on a continuous sample of color printed matter. The patch (200) has a first predefined shape with a color reference area (202) centrally located on the patch (200) and a high contrast feature (204) located proximate to an edge of the patch (200). A camera scans the sample and generates a location signal upon detection of the high contrast feature (204) which permits accurate positioning of a measurement sensor.
Abstract:
Method and system are disclosed for calibrating image capturing for use in beauty analysis. The method may involve instructing a subject to place a body part adjacent a reference image (402) and capturing a calibrating image of the body part adjacent the reference image using an image capture device (410). The method may also involve generating calibration information by processing the calibrating image and information reflective of the reference image, and then calibrating the image capture device and/or a driver for the image capture device using the calibration information.