Abstract:
The present invention relates to a method of displaying colours on an electronic visual display. The colours correspond to a principal colour and one or more auxiliary colours each of which is defined by colour co-ordinates within a colour space. When one or more of the colours is out of the gamut of the display, adjustments are made to the co-ordinates of each colour to allow adjusted colours to be displayed that preserve the colour differences between the principal colour and each of the one or more auxiliary colours.
Abstract:
The invention relates to a method of displaying an image of an effect coating having texture and color properties on an electronic display device, using measured color data and measured texture data as input to generate the image, wherein the textured image is displayed with visual color properties which are maintained on a prescribed level independent of possible variations in texture properties.
Abstract:
[Problem] To provide a technique for calculating the psychophysical value of a color corresponding to an arbitrarily defined tone by modeling a tone concept defined in the PCCS (Practical Color Co-ordinate System). [Solution] A method for, regarding multiple types of tones defined in the PCCS, generating a definitional equation for each saturation to which each of the tones belongs, wherein a computer acquires the Munsell values of colors belonging to respective multiple tones belonging to the same saturation among the multiple types of tones defined in the PCCS, the computer stores the acquired multiple Munsell values in a predetermined storage device, the computer converts each of the multiple Munsell values stored in the storage device into a value in a predetermined color space composed of two axes of values representing lightness and values representing vividness, and the computer performs a predetermined regression calculation on a point group projected to the predetermined color space to find a regression equation passing through the origin of the predetermined color space.
Abstract:
There is described a device (1) for offline inspection and color measurement of printed sheets for the production of banknotes and like printed securities, comprising (i) a console (10) having a supporting surface (10a) for supporting a sample printed sheet (S), (ii) a multipurpose measuring apparatus (20), which multipurpose measuring apparatus (20) comprises multiple sensors (22, 23) including at least one camera (22) for taking images of selected portions of the sample printed sheet (S) and a color measurement sensor (23) for performing spectrophotometric, colorimetric, and/or densitometric measurements at selected locations on the sample printed sheet (S), (iii) a display (30) for displaying the images taken by the camera (22) and the measurements performed by the color measurement sensor (23), and (iv) a control and processing unit (40) coupled to the multipurpose measuring apparatus (20) and the display (30). The device (1) comprises a moveable sensor beam (200) housing the multipurpose measuring apparatus (20), which moveable sensor beam (200) is displaceable along an x-axis over the supporting surface (10a) of the console (10) and over the entire surface of the sample printed sheet (S) located on the supporting surface (10a), the multiple sensors (22, 23) being mounted on a common sensor head (21) which is displaceable within the moveable sensor beam (200) along a y-axis so that the multipurpose measuring apparatus (20) can selectively take images of selected portions of the sample printed sheet (S) by means of the camera (22) or perform measurements at selected locations on the sample printed sheet (S) by means of the color measurement sensor (23). The control and processing unit (40) is configured to control displacement of the moveable sensor beam (200) along the x-axis and of the sensor head (21) along the y-axis.
Abstract:
The invention relates to a method for determining an index for characterizing a quality of a matching color tone of a paint in relation to a color reference, characterized in that colorimetric coordinates of the paint and of the color reference are determined for a number of measuring geometries using a spectrophotometer, color differences are calculated from the colorimetric coordinates of the paint and of the color reference for each of the number of measuring geometries and are normalized, and a pre-established assignment rule is used for assigning a value on a scale to a group of characteristic values calculated from the normalized color differences in order to determine the index.
Abstract:
The invention relates to a method for manufacturing and monitoring a part (1). The method comprises the following steps: a) treating a substrate comprising aluminum by means of a chemical conversion method using a treatment solution comprising chromium at oxidation degree +III such as to obtain a part (1) having a chemical conversion layer (3); and b) monitoring the presence of the chemical conversion layer (3) obtained during Step a) by measuring, through the use of colorimetry, the color of said chemical conversion layer (3) and comparing said measured color with a reference color.
Abstract:
A lighting module with variable colors (1, 2) includes an elastic portion (11), a pressure sensor (12), a color detecting unit (13), and a light emitting unit (14). The elastic portion has an internal space. By applying a force (F), the elastic portion can be deformed so as to generate a pressure change of the internal space. The pressure sensor is coupled to the internal space of the elastic portion, and detects the pressure change of the internal space to output a color transformation signal (S 1 ). The color detecting unit is coupled to the pressure sensor. The color detecting unit receives the color transformation signal and is initiated based on the color transformation signal for detecting a color of a target to generate a color signal (S 2 ). The light emitting unit is disposed in the elastic portion, and emits a light corresponding to the color signal. In addition, a lamp (L) with the lighting module with variable colors is also disclosed.