Abstract:
PROBLEM TO BE SOLVED: To precisely and stably set a color reproduction method. SOLUTION: A color control apparatus includes: a captured image data obtaining unit that obtains captured image data by subjecting a predetermined target to image capturing; a calorimetric data obtaining unit that obtains colorimetric data by subjecting the predetermined target to colorimetry; a first conversion unit that performs a first conversion including gradation conversion on the captured image data and obtains first color data of a predetermined color space; a second conversion unit that performs a second conversion including gradation conversion on the colorimetric data and acquires second color data of a predetermined color space; and a modifying unit that, on the basis of color differences between the first color data and the second color data, performs optimization of the first conversion performed by the first conversion unit. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method that uses a video camera, is relatively inexpensive, can be utilized easily, and moreover, can measure colors of all kinds of objects accurately, reliably, and speedily. SOLUTION: In a transition of control level to a plurality of pixels on the same raster line for correcting the response of a display device 4 having a raster formed of the plurality of pixels, and in a transition of control level of varying the variation in luminance between one pixel on at least the raster line and one pixel immediately after it in the raster scanning direction, the control level of one pixel immediately after it is selected as a function of the variational rate of the luminance of the plurality of pixels, when the control level of the plurality of pixels positioned on the same raster line vary. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for digitalizing coating film irregularities, based on a method for calculating a calculation expression of coating film irregularities for precisely calculating the irregularities of the coating film, and an expression for calculating the irregularities in the coating film calculated by the method for calculating the calculation expression of the irregularities in the coating film, by using data on the surface of a target coating film and the color value of the target coating film. SOLUTION: The calculation expression of irregularities in the coating film is created by the creation and evaluation of a lacquered board for the calculation expression of irregularities in the coating film (S10), calculation of a substituting numerical value of brightness feeling characteristics (S11), measurement of the color value (S12), and the processing of calculation in the calculated expression of irregularities in the coating film (S13). The calculation (S11) of the substituted numerical value of brightness feel characteristics has an image-capturing processing (S11a1) and image processing (S11a2), and the measurement (S12) of the color value has colorimetry processing (S121) and calculation processing (S122) in each color value. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
In evaluating whiteness of light from a light source or a luminaire, whiteness W is given by the following equation, W = -5.3C + 100, wherein chroma C is determined by the CIE 1997 Interim Color Appearance Model (Simple Version).
Abstract:
PURPOSE:To quantify and detect continuously a degree of decoloration without intervention of a worker by irradiating a white light to the surface of a steel sheet and obtaining tristimulus values in accordance with the reflected light and obtaining a whiteness index or color difference value from tristimulus values. CONSTITUTION:A running steel sheet 10 is irradiated with a white light source 14, and the reflected light is separated into spectral components by a reflecting diffraction grating 20, and these spectral components are detected simultaneously in a visible wavelength area by a parallel photodetector array 22. The detected signal is given to an analog/digital operation processing device 24, and tristimulus values X, Y, and Z are obtained from the given signal in the device 24, and a whiteness index W or a color difference DELTAE is operated in accordance with these values X, Y, and Z to convert them to information of a degree of decoloration. Thus, the worker finds the occurrence condition of the degree of decoloration on a basis of the output result of the degree of decoloration and prevents the occurrence of decoloration.
Abstract:
PURPOSE:To provide data for enable more accurate color reproduction to a field of color printing, by measuring optical density having a clear colorimetric definition. CONSTITUTION:The reflected light of a specimen is incident to a spectroscope 18 through a pervious specimen chamber 16 by the light from a light source 14. The spectroscope 18 divides the reflected light into lights classified by wavelength component through a diffraction lattice 19 to allow said lights to irradiate a photodiode array 20. The reflectivity at every wavelength received by the photodiode array 20 is inputted to an operation circuit 21 and three stimulation values X, Y, Z are calculated according to JISZ8722. Further, the operation circuit 21 calculates the density value of each color from three stimulation values X, Y, Z according to a specific formula.
Abstract:
PURPOSE:To improve judgement-making operation by eliminating manual operation, by composing a device of an optical section, a measurement-making section and an indication section, and then, by making it possible to indicate on a CRT deviation of a specimen color from a target color. CONSTITUTION:When a switch on an operating panel 6 of a measurement-making section B is put on, a basic pattern is indicated on a CRT indication section C. And then, when a target color is loaded on an optical section A, a required value is memorized by a microcomputer 5. Further, when a specimen color is loaded on the optical section A, three stimulation values X, Y and Z of the specimen color are sought in the measurement-making section B. And, specimen values Lt, at, bt are sought from X-Z. And DELTAL, DELTAa and DELTAb are sought by subtracting Ls, as, bs of the target color from Lt, at and bt. And then, DELTAL is drawn on DELTAL axis, and a point of intersection between DELTAa and DELTAb is plotted on a target color judging chart. By executing the aforementioned operations, the judging chart is incidated on the CRT, and at the same time, the figure is also indicated by a graphic printer C'.