144 results about "Spectral color" patented technology

An improved apparatus is disclosed for providing a stereoscopic image for viewing by a viewer, with improved resolution. The apparatus includes a generally planar display comprising a two-dimensional array of uniformly spaced pixels, and it further includes a generally planar parallax barrier having an area substantially coextensive with the display and spaced a prescribed uniform distance from the display. The pixel array includes a first set of sub-pixels controllable to project light in a first spectral color, a second set of sub-pixels controllable to project light in a second spectral color, and a third set of sub-pixels controllable to project light in a third spectral color, and the parallax barrier includes a repeating pattern of vertically oriented regions configured to transmit light to the viewer's first eye along light paths defined from only the first set of sub-pixels and to transmit light to the viewer's second eye along light paths defined from only the second and third sets of sub-pixels.

A system and method for performing color correction based on physical measurements (or estimations) of color component spectra (e.g. red, green, blue color component spectra). A color correction system may comprise a spectrum sensing device, a color calibration processor, and a calculation unit. The spectrum sensing device may be configured to measure color component power spectra for pixels generated by one or more display devices on a display surface. The color calibration processor may receive power spectra for a given pixel from the spectrum sensing device and compute a set of transformation parameters in response to the power spectra. The transformation parameters characterize a color correction transformation for the given pixel. The color calibration processor may compute such a transformation parameter set for selected pixels in the pixel array. The calculation unit may be configured to (a) compute initial color values for an arbitrary pixel in the pixel array, (b) compute modified color values in response to the initial color values and one or more of the transformation parameter sets corresponding to one or more of the selected pixels, and (d) transmit the modified color values to the display device.

Methods, systems, and apparatus for mapping a nonspectral representation of a target color, such as an input color tuple, to a set of concentration values for a set of device-specific colorants. The invention includes using the input color tuple to derive a first set of colorant concentration values from a color lookup table; and refining the first set of colorant concentration values by an iterative non-linear process to generate a final set of colorant concentration values. The first set of colorant concentration values can derived by using an input color tuple as an index to obtain grid-point concentration values at two grid points of the color lookup table and calculating the first set of colorant concentration values as a linear interpolation of the grid-point concentration values. In an implementation that provides a color function table of color-additive function values, the iterative non-linear process can include iteratively (a) calculating an interim color tuple from an interim set of colorant concentration values and the color function table, the initial interim set of colorant concentration values being the first set of colorant concentration values, and (b) deriving an interim set of colorant concentration values from a difference between the input color tuple and the interim color tuple. The calculations can include calculating a partial derivative of an error function from the difference between the input color tuple and the interim color tuple; and using the partial derivative to derive a successor interim set of colorant concentration values from a current interim set of colorant concentration values.

A method and apparatus for perfectly lossless and minimal-loss interconversion of digital color data between spectral color spaces (RGB) and perceptually based luma-chroma color spaces (Y′C_BC_R) is disclosed. In particular, the present invention provides a process for converting digital pixels from R′G′B′ space to Y′C_BC_R space and back, or from Y′C_BC_R space to R′G′B′ space and back, with zero error, or, in constant-precision implementations, with guaranteed minimal error. This invention permits digital video editing and image editing systems to repeatedly interconvert between color spaces without accumulating errors. In image codecs, this invention can improve the quality of lossy image compressors independently of their core algorithms, and enables lossless image compressors to operate in a different color space than the source data without thereby becoming lossy. The present invention uses fixed-point arithmetic with signed and unsigned rounding normalization at key points in the process to maintain reversibility.

In the method for creating color patterns for technical applications and visible for the human eye by means of diffraction gratings through light irradiation, diffraction grating arrays are produced directly on a solid body surface in a laser microstructuring process by at least one laser installation in the nanosecond range or in the pico- or femtosecond range, each diffraction grating array being composed of subareas (81) whose longitudinal dimension has a value below the resolving ability of the eye and which contain at least one pixel (81, 82, 83), a pixel being a limited diffraction grating structure for producing a spectral color. The direct application of such color-producing diffraction grating structures to a solid body surface enables a large variety of decorative and authentication possibilities ranging from embossing tools to jewellery.

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.

A perceptible apparatus and method for creating a subtle energy field is disclosed. The apparatus includes a light source and a plurality of configuration elements that are in effectual communication with the light source, wherein the configuration elements are adjustably selectable to produce subtle energy of different vibrations. The plurality of configuration elements are preferably selected from the group consisting essentially of a spectral color analysis of the light source, a brightness of light pulses from the light source, a wave form of light pulses through a duration of light pulse(s), and a frequency of light pulse transitions from “on” to “off,” or transitions between different brightness levels. Also included in the plurality of configuration elements is an emitter in the form of a translucent element that is in light wave communication with the light source to further produce changes in the subtle energy field.

The invention relates to an LED light source of one kind of solar spectrum and a manufacturing method thereof. The fluorescent powder of a light conversion layer only has three components, flour blending is easy to perform during a production process, a flour blending error rate is reduced, a light source color coordinate file falling rate is higher than that of a technical scheme adopting more phosphors, and the file falling rate of an integral product color coordinate is easy to control during a light source production process. A spectrum realized in the invention is similar to a sunlight spectrum, and compared with the quasi-solar spectrum in the prior art, the energy of a purple light portion is increased. In the invention, a purple light chip is adopted, the energy after 430nm is high, and the spectrum is closer to the real solar spectrum. The light quality of an ordinary LED light source is poor due to the lack of dark red portion energy. The dark red phosphor with a 650 nm emission peak is adopted to complement the energy of the dark red portion so as to achieve better light quality. A latest IES Rf-Rg calculator (IES TM30-15) standard is used to assess, and Rf is greater than 95 and Rg is greater than 99. A realized spectral color temperature coverage range is wide and is from 2200K to 10000K.

A backlighting system for liquid crystal displays includes one or more first lighting structure (130, 230), which has a defined radiant flux with spectral color components at one operating point. The radiant flux output from the first lighting structure (130, 230) exits across a radiant surface (A) of the backlighting system and thus provides a defined luminous flux with spectral color components on a liquid crystal glass (10) that can be arranged in front of this radiant surface (A). Also, the backlighting system has one or more additional lighting structure (140, 240, 340). The radiant flux of the additional lighting structure varies. This additional lighting structure (140, 240, 340) is arranged such that the spectral color components of the luminous flux change when the radiant flux of the additional lighting structure (140, 240, 340) is changed. The liquid crystal display is used for controlling and monitoring in an automation system.

What is disclosed is a novel system and method for generating a spectral matching guide for spot color print applications. Spectral matching values are determined for spot colors obtained from a library of spot colors. A spectral matching guide is created from the spot colors and their respective spectral matching values in a manner more fully disclosed herein. Thereafter, when a user desires to render a job in a particular spot color, the associated spectral matching value for that spot color can be obtained from the spectral matching guide. In other embodiments, recommendations in the form of a suggested printer to use, a media type, a halftone screen, and other meaningful assistance can be provided for selection of spot colors for a given print/copy job that are less sensitive to varying illuminations. The present spectral matching guide provides meaningful extensions in spectral color reproduction in print/copy job environments.

Mapping spectral colors in an Interim Connection Space (ICS) of a full spectral space based on an objective function is provided. A spectral color value in the ICS is accessed, and a spectral gamut boundary of the destination gamut is accessed. The spectral color value is mapped into mapped spectral color value based on minimization of an objective function of coordinates of a first subspace of the ICS, by fixing coordinates of a second subspace of the ICS, subject to a constraint that a result is within the spectral gamut boundary. The first subspace is a null space of a transformation from the ICS to a color space, while the second subspace is an orthogonal complement of the first subspace in the ICS. The constraint is determined by a gamut section that is an intersection of the spectral gamut in the ICS and an affine subspace characterized by the fixed coordinates of the second subspace.

The invention relates to the technical field of spectral domain mapping, and especially discloses a method of realizing cross-media color reproduction based on a spectral domain. The method of realizing cross-media color reproduction based on a spectral domain is characterized by comprising the following steps: establishing a chromaticity-gamut space of a target device; judging whether the CIE Lab value of a source device sample point is within the chromaticity-gamut space of the target device; forming a metameric black spectrum according to the CIE Lab value corresponding to each test sample; reducing the dimension of the metameric black spectrum to get a metameric black dimension reduction space; and in the metameric black dimension reduction space, judging whether the dimension reduction space numerical value of each test sample is within the dimension reduction space value numerical range of the target device. The time complexity is reduced. The dimension is low. The method is set up using a spectral color management system, and is convenient for users to use.

The invention relates to a method for mixing colors of solid wood floor paint. The method comprises the following steps: according to six ratios being 1 percent, 2 percent, 3 percent, 4 percent, 5 percent and 6 percent of three color concentrates of red, yellow and black relative to the quality of water-based primer, mixing to prepare an additive color primer sample; coating the black and white paperboard with the additive color primer sample through a coating rod, and thus obtaining a paint film sample; by means of a color measuring and matching system composed of a spectral color measurement instrument and Colibri color matching software, detecting the color data of the paint film sample, and saving the color data in the color matching system; inputting the quality data of the water-based primer used for manufacturing the paint film sample and the three color concentrates of red, yellow and black into the color matching system, computing and processing the quality data with the Colibri color matching software, and thus building a color concentrate database; before the colors of the paint is mixed, detecting the color of a plain floor board as a bottom color and the color of a painted finished product floor as a target color; by means of the color concentrate database, automatically computing the application proportion of the three color concentrates of red, yellow and black of paint films with various thicknesses through the color matching system. The accuracy and efficiency of color mixing of paint are high.

The invention relates to a method for detecting the UV (ultraviolet) light stability of special titanium dioxide for paper making. The method comprises the following steps that the titanium dioxide and carbonate are uniformly dispersed into linseed oil, castor oil, glycerol or petrolatum oil to obtain mixed size which is prepared into a wet film, and the wet film is clamped in the middle through transparent glass sheets to form a film sheet; the CIEL*a*b* of the film sheet is detected through a spectral color photometer; the UV light used by the film sheet is uniformly illuminated, and the film sheet is put into the spectral color photometer to detect the CIEL*a*b*; according to the detected CIEL*a*b* before and after illumination, the triangle E is calculated by the spectral color photometer, namely the capacity of the titanium dioxide to resist the UV light; parallel samples are detected; and when the difference of the parallel detection results is less than 0.15 and the average value of the parallel sample detection results is less than 0.5, the UV light stability of the titanium dioxide conforms to the requirement of the special titanium dioxide for paper making. The method manufactures the samples into a wet film mode, the UV light stability of the titanium dioxide can be rapidly and directly monitored, the precision of the detection results is good, and the detection cost is low.

This invention comprises the means for the capture of full spectrum images in an electronic camera without the use of color primary filters to limit the spectral color gamut of the captured image. The fundamental principle of the invention is that each pixel of the image sensor acts as an independent spectrophotometer and spectral separator.

Electromagnetic energy enters though a slit or collimating optic.

Electromagnetic energy gets diffracted into component spectra by diffraction grating spectrophotometer for each pixel of image

Electromagnetic energy leaves diffraction grating at different angles based on wavelength of the energy

Spectrophotometer separates light for each pixel into its spectral components onto photodetector line array elements.

Individual line array elements which are activated determine the original radiance level of the light source containing that specific wavelength region. The sum of these regions determines the spectral signature of the light at that pixel element.

Many pixels arranged in a two-dimensional matrix would generate the image frame. Sequencing frame yields a full-spectrum moving image.

A digital camera including an imaging device, which is adapted to store electric charges for each spectral color of a plurality of spectral colors from an object image and output image signals corresponding to the object image, is provided. The digital camera further includes a storage time controlling system, which is adapted to control length of storage time of the electric charges for each spectral color independently.

The invention discloses a RAW image radiation temperature measuring method. The method comprises the following steps: a CCD camera outputting image data in a RAW format, and storing the data as a true color RGB image after linearity interpolation; arranging the exposure time of the CCD camera through RAW image gray scale signals obtained from the image data in the RAW format; and extracting a spectral color value of each channel from the true color RGB image; obtaining image detection data from ratios of the spectral color values to the exposure time; taking a conversion proportion coefficient, calibrated through a black-body furnace, between the image detection data and incident radiation intensity, as a calibration constant; through the CCD camera, continuously acquiring radiation images, and extracting spectral color signals and exposure time signals of any two channels in pixels R, G or B; and performing correction through the calibration constant to form correspondingly extracted monochromatic radiation intensity signals under the condition of two primary wavelengths, and according to a colorimetric temperature measurement principle, obtaining an image temperature and a radiation ratio. The temperature measuring apparatus provided by the invention comprises the CCD camera, a stiff rod endoscope, a network switch and a background server.