In one embodiment, an apparatus for measuring a color of a non-solid colored sample includes an integrating sphere having a sensor port, a sample port, and a plurality of registration marks affixed to an interior surface of the integrating sphere, outside a periphery of the sample port, a camera positioned near the sensor port, and a plurality of filters positioned between the integrating sphere and camera. An optical axis of the camera extends from the camera, through at least one of the plurality of filters, through the sensor port, to the sample port.
A system and method for correcting the color of microscope images is described wherein a microscope, equipped with a variable light source and at least one microscope setting selector operates in conjunction with an image recording device having at least one image setting selector with a plurality of settings, and is configured to record at least one white balanced sample image of a sample. The system and method also includes the use of at least one white balanced calibration image of an integral transmissive color filter array of known transmission values in combination with an image processor executing code in order to color calibrate the sample images based on the calibration image.
The present invention is a microscope slide apparatus and method of use thereof, wherein the slide has an integrated color calibration array of filter elements, each element having a given dimension, each element also having a known transmission spectrum. The complete filter array is observable in the field of view of a microscope under at least one magnification setting of a microscope. The invention further characterized with a secondary integrated filter array that is completely observable at a second magnification setting.
A method for evaluating a color of a sample includes acquiring a color calibrated swatch of the sample, the color calibrated swatch comprising a plurality of pixels, and comparing all pixels that are of a first color in a swatch of a standard to all of the plurality of pixels that are of a second color, wherein the second color is a color in the swatch of the sample that is most similar to the first color in the swatch of the standard.
A system and method are disclosed for correcting the color of microscope images for different illuminants. The system includes a microscope having at least one image setting value selector with a plurality of pre-set positions, and an optical train having a distal end and a proximal end and being configured to convey illumination, The optical train is further configured to allow introduction of a calibration slide into the optical train of the microscope at a plurality of possible positions, each position being a conjugate plane of the sample plane, when the sample is in focus. The calibration slide incorporates an integral transmission filter array of known transmission values.
Aligning measurements taken by a second color measurement instrument with measurements taken by first color measurement instrument, wherein the first instrument has access to a first set of standards but not a second set of standards, and the second instrument has access to the second set of standards but not the first set of standards, includes using a third color measurement instrument to generate a profile that mathematically transforms a value measured on the second set of standards to a value measured on the first set of standards, wherein the third instrument has access to the first and second sets of standards, mathematically transforming measurements of the second set of standards taken by the second instrument into virtual measurements of the first set of standards, using the profile, and aligning the measurements taken by the second instrument to the measurements taken by the first instrument, using the virtual measurements.
One embodiment of a method for aligning measurements taken by a plurality of color measurement instruments with measurements taken by an industry standard color measurement instrument includes receiving a first set of spectral data from the plurality of instruments, receiving a second set of spectral data from the industry standard instrument, generating initial profiles for the plurality of instruments (by producing, for each given instrument, a first correction that aligns the spectral data taken by the given instrument with the second set of spectral data), mathematically correcting the first set of spectral data using the initial profiles to produce a third set of spectral data, and generating new profiles for the plurality of instruments (by calculating a mean of the third set of spectral data, and producing, for each given instrument, a second correction that aligns the spectral data taken by the given instrument with the mean.
One embodiment of a method for calibrating a test color measurement device in conjunction with an emissive display includes measuring spectral sensitivities of at least four channels of a more-than-three-channel sensor in the test color measurement device, linearly regressing the spectral sensitivities to a least-square best fit to Commission International de l'clairage (CIE) color matching functions, wherein the linearly regressing is performed using a weighting function that is based on a square root of a spectral power distribution characteristic of the emissive display or of a type of the emissive display, and computing a set of initial fitting coefficient values from the linearly regressing.
G09G 5/02 - Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
9.
METHOD AND APPARATUS FOR EVALUATING COLOR IN AN IMAGE
A method for evaluating a color of a sample includes acquiring an image having a plurality of pixels from a sample and a plurality of pixels from known color calibration patches. The image is color calibrated using the known color patches to endow the pixels from the sample with the tristimulus values they would have under one or more known illuminants. The calibrated image is transmitted, together with metadata, to a remote location where further computations and an approval process are performed. The further computations include comparing all of the pixels in the image of a standard that are of a first color to all pixels of a second color in the similarly calibrated image of the sample, where the second color is a color in the image of the sample that is most similar to the first color from the image of the standard.
One embodiment of a solid-state color-measuring device includes a plurality of photodetectors and a plurality of filters permanently deposited on the photodetectors, where at least one of the filters includes a single colorant layer having a transmission coefficient as a function of wavelength that descends from a maximum value between approximately 445 and 450nm to fifteen percent of the maximum value between approximately 485 and 495nm.
In one embodiment, the present invention is a beaker type dyeing machine. One embodiment of an apparatus for dyeing a material in a beaker includes a cylinder body having a first end and a second end, the first end being configured for coupling to the lid of the beaker, a check valve incorporated into the first end of the cylinder body, and a plug incorporated into the second end of the cylinder body, the plug being operable to control opening and closing of the check valve.
D06B 23/00 - Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups
In one embodiment, the invention is a spectrophotometer with a modular 45/0 head. One embodiment of an apparatus for measuring a reflectance of a sample includes a plurality of light emitting diodes for emitting light, a reflective housing positioned above the plurality of light emitting diodes, where the reflective housing is a dome having a plurality of apertures formed around its perimeter, a sample channel for capturing a first portion of the light, where the first portion of the light interacts with the sample, and a reference channel for capturing a second portion of the light, where the second portion of the light is independent of the sample.
In one embodiment, the present invention is a method and apparatus for cleaning an integrating sphere (102), such as an integrating sphere (102) used in an integrating sphere spectrophotometer (100). One embodiment of a spectrophotometer includes an integrating sphere (102) having a reflective interior surface, a primary light source (116) configured to illuminate the interior surface when enabled, and a secondary light source (118) configured to emit ionizing radiation onto the interior surface.
One embodiment of a method for calibrating a test color measurement device in conjunction with an emissive display includes measuring initial spectral sensitivities of at least four channels of the test color measurement device, linearly regressing the spectral sensitivities to a least-square best fit to CIE color matching functions, measuring CIE tristimulus values of test colors on the display using a reference color measurement device, measuring the CIE tristimulus values on the display using the test color measurement device, transforming the CIE tristimulus values measured by the test color measurement device to CIE tristimulus values that would have been measured by the reference color measurement device, using a nonlinear function with variable fitting coefficients, and storing initial fitting coefficient values that provide a least-square best fit of the CIE tristimulus values measured by the test color measurement device and the CIE tristimulus values measured by the reference color measurement device.
H04N 9/24 - Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position
15.
METHOD AND APPARATUS FOR CALIBRATING VIDEO SIGNALS
In one embodiment, the present invention is a method and apparatus for calibrating video signals. One embodiment of a method for calibrating chrominance/luminance of a video signal for display on a display device includes receiving an uncalibrated video signal from a video source, calculating a correction necessary to calibrate the color of the uncalibrated video signal, using stored correction data, and applying the correction to produce a calibrated video signal in substantially real time.
G09G 5/02 - Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
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