140 results about "Color response" patented technology

An image sensor for capturing a color image comprising a two dimensional array of light-sensitive pixels including panchromatic pixels and color pixels having at least two different color responses, the pixels being arranged in a repeating pattern having a square minimal repeating unit having at least three rows and three columns, the color pixels being arranged along one of the diagonals of the minimal repeating unit, and all other pixels being panchromatic pixels.

A method of forming a full-color output image from a color filter array image having a plurality of color pixels having at least two different color responses and panchromatic pixels, comprising capturing a color filter array image using an image sensor including panchromatic pixels and color pixels having at least two different color responses, the pixels being arranged in a repeating pattern having a square minimal repeating unit having at least three rows and three columns, the color pixels being arranged along one of the diagonals of the minimal repeating unit, and all other pixels being panchromatic pixels; computing an interpolated panchromatic image from the color filter array image; computing an interpolated color image from the color filter array image; and forming the full color output image from the interpolated panchromatic image and the interpolated color image.

A lighting system is disclosed. The lighting system includes a first lighting module and a second lighting module connected parallel to the first lighting module. The first lighting module generates light at a first color temperature and the second lighting module generates light at a second color temperature. The first lighting module has a first activation voltage and the second lighting module has a second activation voltage. The two lighting modules generate light when the current flow through them. When input voltage is changed, not only does the amount of current flowing through the two modules change, but also ratio of the amount of current flowing through the two lighting modules changes. The change in the ratio changes the color temperature of the light produced by the lighting system which is a combination of the light produced by the two modules.

A method for estimating color measurements of color samples includes printing a color sample based on input data, measuring a color of the printed color sample with an in-line spectral sensor at a first temperature, and estimating a color of the printed color sample which would be output by a reference spectral sensor at a second temperature. The estimation is based on a thermochromatic model which represents relationships between measured colors of printed color samples on the in-line spectral sensor at the first temperature and the reference spectral sensor at the second temperature. The reference spectral sensor is a different type of sensor from the in-line spectral sensor, so the color response of the two spectral sensors is different, even when the measurement conditions are identical. Consequently, a set of printed spot color samples generate different measured colors at the second temperature on the in-line spectral sensor from the reference spectral sensor. The exemplary method allows these differences, as well as measurement temperature differences to be accounted for in the estimation.

An image sensor is disclosed for capturing a color image, comprising a two-dimensional array of pixels having a plurality of minimal repeating unit wherein each repeating unit is composed of eight pixels having five panchromatic pixels and three pixels having different color responses.

Methods and systems are presented for calibrating or characterizing a color printer or determining the color response of a color printer to combat spatial non-uniformity, in which color patches are printed on a test page according to an input matrix of input color in a printer-dependent-color space and the test page is measured to provide a corresponding output matrix of output color in a printer-independent-color space. Initial forward and inverse color transforms between the input and the output colors are generated based on the input and the output matrices. The output values are mapped to the input color space based on the initial inverse transform to form a feedback matrix, and spatial non-uniformities present in the printed test page are estimated according to noise values derived from the input matrix and the feedback matrix. The input matrix is modified according to the estimated spatial non-uniformity to form a modified input matrix of input color, and final forward and inverse transforms are generated for the color printer according to the modified input matrix and the output matrix.

A method is described for forming a full-color output image from a color filter array image comprising capturing an image using an image sensor including panchromatic pixels and color pixels having at least two different color responses, the pixels being arranged in a rectangular minimal repeating unit wherein for a first color response, the color pixels having the first color response alternate with panchromatic pixels in at least two directions, and for each of the other color responses there is at least one row, column or diagonal of the repeating pattern that only has color pixels of the given color response and panchromatic pixels. The method further comprising, computing an interpolated panchromatic image from the color filter array image; computing an interpolated color image from the color filter array image; and forming the full color output image from the interpolated panchromatic image and the interpolated color image.

An image sensor is disclosed for capturing a color image, comprising a two-dimensional array of pixels having a plurality of minimal repeating unit wherein each repeating unit is composed of eight pixels having five panchromatic pixels and three pixels having different color responses.

A method, test reagent and device usable as a test strip for detecting toxic ammonia levels in water samples such as aquarium water. The volume of the water to be tested contacted with a soda lime reagent to raise the pH to at least 10, and simultaneously contacted with a hydrophobic barrier membrane capable of allowing only ammonia gas to pass through. The membrane is coated with a pH chromogenic indicator mixture which changes color if ammonia gas passes through. The color response of the sample is compared with standard color charts to determine the toxic ammonia potential.

Creation of a reverse look-up table from a forward look-up table for a color device. Indexes to the forward look-up table span all possible color stimulus values for the color device in a device dependent color space. Outputs from the forward look-up table span a color gamut of corresponding color response values for the color device in a device independent appearance color space. The reverse look-up table maps a color response value in the device independent appearance color space to a color stimulus value in the device dependent color space. Indexes to the reverse look-up table span beyond the color gamut of color response values for the color device, and outputs from the reverse look-up table span beyond all possible color stimulus values for the color device. According to the invention, a first portion of the reverse look-up table, in which indexes fall within the color gamut, is populated by search and interpolation in the forward look-up table for color stimulus values corresponding to color response values of the indexes to the first portion of the reverse look-up table. A second portion of the reverse look-up table, in which indexes fall outside of the color gamut, is populated by extrapolation from extrapolation color stimulus values. The extrapolation color stimulus values are found by search and interpolation in the forward look-up table for color stimulus values corresponding to color response values near a boundary of the color gamut.

An image sensor for capturing a color image, comprising a two-dimensional array of pixels having a plurality of minimal repeating units wherein each repeating unit is composed of eight pixels having four panchromatic pixels, two pixels having the same color response, and two pixels having different color responses that are different than the pixels having the same color response, with the minimal repeating units tiled to cause each row or each column of the image sensor to have color pixels of a single color or to cause each row and each column to have color pixels of only two colors.

The invention discloses a method for manufacturing an all-solid visualized taste sense sensor array, and belongs to the technical field of sensor array manufacturing methods. The method comprises the steps of selecting hydrophobic porphyrin compounds or phthalocyanine compounds with color response to microchemical substances in a liquid sample as visualized sensitive materials; selecting a hydrophilic mixed cellulose ester microporous membrane, a hydrophobic acrylonitrile-butadiene-styrene (ABS) plastic sheet and waterproof double-faced adhesive tape as substrate manufacturing materials, taking 0.1-10 microliters of visualized sensitive material solutions through a micro-sampling device, and fixing the visualized sensitive material solutions to the mixed cellulose ester microporous membrane in pores of a substrate, wherein one visualized sensitive material is fixed in one pore; drying chloroform to obtain the visualized taste sense sensor array. The all-solid visualized taste sense sensor array has the advantages of being low in cost, high in detection precision, wide in detection range, long in service life, high in batch uniformity and the like.

Embodiments of the invention include systems and methods for predicting video quality through human vision perceptual color response and associated perceptual differences of video relative to a reference. Embodiments include a model of the human vision system developed as an extension to CIECAM02 to predict the macro-behavioral response to light stimuli with the following varying parameters, in addition to the parameters relevant to CIECAM02: spatial frequency, temporal frequency, angular extent, temporal extent, and surround.

The invention pertains to the technical field of gasochromic film, in particular to a method for improving gasochromism speed of the gasochromic film. The invention adopts sol-gel method for preparing the stable solution containing various metal oxides and the compound solution thereof; and various methods are employed for coating transparent and even gasochromic film on common glass or polished silicon wafer, and ultraviolet or high energy ray and high energy-particle mixing with catalyst are employed in the gasochromic film method so as to change the structure of film and enhance the coloring response speed of the gasochromism of the sol-gel technique, shorten coloring saturation time. Compared with the non treatment film, the gasochromism efficiency are greatly improved; and the performance is the same as the gasochromism produced by magnetron sputtering method, while, cost is greatly reduced; and the produced film by the invention also has the same advantages as the electrochromic film. The invention makes up the shortages of gasochromism smart window made by sol-gel preparation method, thus the smart window technique can be more mature.

A method for calibrating specialty toner, the method includes providing a substrate; depositing an invariant or substantially invariant laydown of a color toner on the substrate; depositing a varying laydown of the specialty toner; fusing the color toner and specialty toner to the substrate; measuring a color response signal of the substrate, color toner, and specialty toner; calculating a color response curve as function of the varying laydown of the specialty toner; comparing the color response curve to a target color response curve; and modifying printing parameters of the specialty toner to set the color response curve equal to or substantially equal to the target color response curve.

A display color-correcting system is provided. Color response values are measured that go into the vertices of polyhedra in a cubic color output space of the display. A set of corresponding values for the display is built from intermediate values determined between the measured color response values. The intermediate values are determined by decomposition and interpolation of interpolation volumes in the cubic color output space. Each of the interpolation volumes is the combined volume of a selected polyhedron within the cubic color output space and a predetermined volume of space between the selected polyhedron and the next polyhedron within the cubic color output space. The set of corresponding values is converted into decoupled RGB adjustment values that specify the RGB signals independently for the display to produce corrected colors. The RGB adjustment values are saved into one or more look-up tables.

A method is described for forming a full-color output image from a color filter array image comprising capturing an image using an image sensor including panchromatic pixels and color pixels having at least two different color responses, the pixels being arranged in a rectangular minimal repeating unit wherein for a first color response, the color pixels having the first color response alternate with panchromatic pixels in at least two directions, and for each of the other color responses there is at least one row, column or diagonal of the repeating pattern that only has color pixels of the given color response and panchromatic pixels. The method further comprising, computing an interpolated panchromatic image from the color filter array image; computing an interpolated color image from the color filter array image; and forming the full color output image from the interpolated panchromatic image and the interpolated color image.

The invention provides a pH color-response sensing type micro-nanofiber, a preparation method and application thereof, which relate to a response sensing type micro-nanofiber, a preparation method and application thereof. The invention solves the problems of low sensitivity and long reaction time of the traditional poly-Schiff base film for acidichromism. The diameter of the micro-nanofiber is between 10 nanometers and 2 micrometers, and the micro-nanofiber is prepared from a spinning solution through an electrostatic spinning technology. The preparation method comprises the following steps of: firstly, dissolving the poly-Schiff base into a polymer solution to prepare the spinning solution, and then, preparing the micro-nanofiber by the electrostatic spinning technology. The micro-nanofiber is applied to a pH color response sensor, is evenly distributed, is in bunched fiber or a felty film and has the advantages of sensitive pH color response and short metachromatism time (0.5s-1s). The pH color-response sensing type micro-nanofiber has obvious color response for 0.1-10000ppm response matters. The preparation method is completed at room temperature, has the advantages of short preparation time, convenient operation and low energy consumption, and is convenient to practice.

The invention relates to a color response calibration method in a colored structure light three-dimensional measurement system, which comprises the following steps of: designing an auxiliary calibration image containing six sub-calibration areas, wherein the six sub-calibration areas comprise three basic pure colors, and each pure color has two brightness variation trends; turning the auxiliary calibration image into a white flat plate, carrying out color segmentation on the collected response image, and obtaining six sub-calibration mapping areas; carrying out average operation on the two sub-calibration mapping areas of each basic pure color according to the direction of the same variation trend; taking the result of the average operation as independent variable and ideal response curve as dependent variable for second-order polynomial fit, and obtaining the response function of color response calibration; and finally, according to the response function, calibrating the measurement colored image obtained in colored structure light three-dimensional measurement.

A display device calibration system is provided. The overall color response of a display family is characterized, and the idiosyncratic color response characteristics of the display family are determined. The idiosyncratic color response characteristics of the display family are related to respective idiosyncratic color response points. Individual idiosyncratic color response point values for an individual member of the display family are determined. The color response of the individual member of the display family is specified from the individual idiosyncratic color response point values of the individual member of the display family and the overall color response of the display family.

A method that includes obtaining, using a processor, reflectance data from a target coating and calculating, using the processor, virtual color response data using one of at least one Kepler's laws of planetary motion equation and at least one derivation of at least one Kepler's laws of planetary motion equation. The method also includes generating, using the processor, a coating formulation that is the same or substantially similar in appearance to the target coating.

The invention provides a virtual multi-source spectral reconstruction method based on color constancy. The method is characterized by comprising the following steps that a color response value of a training sample set and a color response value of a to-be-tested sample are obtained through a digital imaging device under an ambient light source; then a color constancy and white balance formula is used for calculating a multi-dimensional color response value of a virtual light source corresponding to the training sample set and the to-be-tested sample; finally, the spectral reflectivity of the to-be-tested sample is obtained through calculation through a linear model method. Therefore, on the premise that the influence of a reference light source is eliminated, the multi-dimensional color response value is constructed in the virtual light source to reconstruct the spectral reflectivity, calculation is simple, the spectral reconstruction precision is high, and the method is relatively convenient for users to use.

The invention discloses a pH color response sensing micro-nano fiber, a preparation method and the application thereof, relating to a response sensing micro-nano fiber, a preparation method and the application thereof, and aiming to solve the problem of low sensitivity and long reaction time existing in current polyschiff base film used in acid-induced discoloration. The diameter of the micro-nano fiber is 10 nanometers to 2 microns and prepared from spinning solution through the electrostatic spinning technology. The preparation method comprises the following steps: dissolving polyschiff base into polymer solution so as to prepare spinning solution firstly; and then using the spinning solution to prepare the micro-nano fiber through the electrostatic spinning technology. The micro-nano fiber is applied to a pH color response sensor. The micro-nano fibers of the invention are distributed uniformly, and displayed as bunched fibers or blanket films; and have the advantages of high pH color response sensitivity and short discoloration reaction time, wherein the discoloration reaction time is 0.5 s to 1s, and the micro-nano fiber has obvious color response to the response substances (0.1 to 10000 ppm). The preparation method is completed at room temperature and convenient in operation, low in energy consumption, and facilitates to practical use.

The invention discloses a color response testing and correcting device and method for industrial color cameras. The device comprises an RGB three-color LED (Light-Emitting Diode) array light source, an LED driving controller, an integrating sphere, a colorimeter, industrial cameras to be detected, a data acquisition card and a computer. The method comprises the following specific steps: adjusting the RGB three-color LED array light source to output standard testing light, acquiring data of a plurality of images, calculating a mean value of camera RGB pixel output responses of different images, and building a response coefficient correction table with consistent RGB pixel point response outputs under the same RGB illumination intensity; and adjusting the light source to other standard illumination conditions, acquiring data of a plurality of images under corresponding illumination conditions, and calculating a mean value of the camera RGB pixel output responses of different images. Camera color correction models under different standard illumination conditions are subjected to least square fitting in order to match camera output colors with standard colors. Moreover, the models are input into a camera color correction module to finish correction.