21 results about "Color index" patented technology

The invention provides an LED light source uniformity and color deviation detection method, which comprises the following steps: setting environmental parameters of a constant temperature and humidity test box, monitoring the environment in the box in real time through a temperature and humidity sensor, and triggering a temperature and humidity control system to adjust when detecting that the temperature and humidity deviate from a set value; according to the initial color characteristic database, placing an LED light source in the constant-temperature and constant-humidity test box for an accelerated aging test, and obtaining spectral data of the light source at different time points by adopting a spectrum analyzer; calculating chromaticity coordinates, color temperatures and color rendering indexes corresponding to the spectral data at different time points, calculating a color deviation value of the LED light source, and fitting a change curve of the color deviation along with time; and according to an accelerated aging test result of the LED light source, calculating the color maintenance life of the light source in a high-temperature and high-humidity environment, and completing color deviation detection through a color stability uniformity index of the LED light source.

A music rhythm control method for a vehicle-mounted atmosphere lamp comprises the following steps: dynamically mapping colors of the atmosphere lamp to a cold color system, a middle color system and a warm color system based on a predefined color system division rule; establishing a real-time mapping relationship between frequencies and color systems, and enabling different audio frequency intervals to trigger target color indexes of different color systems; establishing a hierarchical mapping relationship between the amplitude and the brightness; receiving a frequency signal and an amplitude signal generated by audio decoding in real time; determining a target color index and a brightness level through the mapping relation according to the currently received frequency signal and amplitude signal; according to the method and the device, the cold color system, the medium color system and the warm color system can be distinguished to achieve music rhythm, the music rhythm atmosphere better fitting user definition is achieved, and the problem that algorithms are not uniform due to the fact that atmosphere lamps on the market are too many in color type is solved.

The application discloses a kind of detection methods of energetic material mixing uniformity, belong to material uniformity inspection technical field, including steps S1: energetic material is mixed with tracer to obtain mixed sample with different mass ratio, image is illuminated and photographed;Step S2: image is analyzed, and mixed sample with the linear relationship between tracer concentration and the color index is selected as standard sample;Step S3: the standard sample of different concentration is added to mixing device and is mixed, and image is photographed;Step S4: the image of the standard sample after mixing is sampled and the variation coefficient of color index is calculated to evaluate mixing uniformity.The method provided by the application can realize real-time monitoring and detection analysis of the mixing process of energetic material, which is simple, easy to operate and efficient, and can evaluate the mixing uniformity of energetic material by obtaining the image of energetic material with tracer, thus widening the application of online detection in the field of energetic material detection.

This invention discloses an LED spectral distribution optimization design method and an LED light source. The design method includes the following steps: S1, establishing a basis function library based on the Gaussian emission spectral function of phosphor materials; S2, defining the full spectral distribution function and optimization variables of the phosphor mixture; S3, constructing a comprehensive evaluation function and constraints based on color temperature, spectral efficacy, and color rendering index; S4, applying simulated annealing algorithm for optimization, aiming to minimize the comprehensive evaluation function, and globally optimizing the basis function weight vector w; S5, adjusting the comprehensive evaluation function and constraints and iteratively optimizing. This design method is applicable to the spectral control of white LEDs excited by multi-color phosphors, and can achieve synergistic optimization of color rendering index, color temperature accuracy, and luminous efficacy over a wide color temperature range, significantly improving the overall light quality and design efficiency of the LED light source.

The invention discloses a light source arrangement method and device of a multicolor light source module, electronic equipment, a storage medium and a computer program product. The method comprises the following steps: dividing a to-be-arranged color segment range to obtain a low color temperature segment and a high color temperature segment; determining a first auxiliary color set corresponding to the low color temperature segment and a second auxiliary color set corresponding to the high color temperature segment according to the light source efficiency maximization demand and the color rendering index maximization demand; based on the preset maximum target brightness, the preset multicolor light source white light mixing power, the color rendering index maximization requirement, the preset basic color set, the first auxiliary color set and the second auxiliary color set, light source number matching is carried out, and the light source number of each color is obtained; and performing light source arrangement based on a preset light mixing effect optimal arrangement principle and the number of the light sources of each color to obtain a uniformly-distributed multi-color light source module. By implementing the method, the problems that a traditional RGB light source is insufficient in color development and poor in color uniformity can be solved.

The application provides a metamerism-based spectral optimization method and related products, and relates to the optical technology field, and the specific implementation scheme is: according to the light color index corresponding to the set light source hue of a multi-spectral light source, the different spectral channels of the multi-spectral light source are proportioned to obtain an initial spectral data set, wherein the number of spectral channels of the multi-spectral light source is greater than or equal to the number of spectral channels of the lighting light source required to achieve the metamerism effect under the actual lighting environment; the initial spectral data set, the object spectral reflection curve and the light color index corresponding to the set object hue are combined to obtain the initial spectral data set; and the target spectral data set is selected from the initial spectral data set to form an optimized spectral data set according to the reference lighting environment demand index value. Through the implementation of the application scheme, the spectral level optimization of the light source is adapted to the light source color, the object color and the object reflection characteristics, the more precise light source control is realized by comprehensively considering multiple factors, and the environmental lighting demand under the complex scene can be effectively met.

To provide LED light-emitting devices and lighting fixtures with excellent color rendering at high color temperatures. [Solution] A light-emitting device comprising one or more LED elements and multiple phosphors, wherein the extracted light from the light-emitting device has a color temperature of 8400 to 10000K, an average color rendering index Ra of 95 or higher, and a special color rendering index R9 of 88 or higher. Furthermore, the extracted light from the light-emitting device has chromaticity coordinates of 0.27 to 0.29 and 0.30 to 0.32 in the chromaticity diagram of the CIE1931 color system.

The present invention provides a white point detection method, an automatic white balance method, a calibration method, a medium and a device. The white point detection method comprises: acquiring a target image, the target image corresponds to a target light source; performing color transformation on the target image to transform the target image into a target color space to generate a target color space image, the target color space image is represented by a first color value and a second color value, the first color value is used to represent the color temperature, and the second color value is used to represent the color rendering index; and determining a pixel point located in a white point area in the target color space image as a white point in the target image. The white point detection result obtained by the white point detection method has a high accuracy.

A method for illuminating an object (200) to be observed and the background, the method comprising the steps of: determining a color matching function and obtaining an xy color value diagram using the color matching function; obtaining a relationship between wavelength and spectral radiance of the object (200) to be observed while the object (200) to be observed and the background are illuminated by a first light source emitting light having an average color rendering index of 40 or more, a color temperature in the range of 3000 K to 10000 K and a continuous spectrum in the wavelength range of 380 nanometers and 780 nanometers; and determining a representative wavelength value corresponding to a local maximum value of the spectral radiance of the object (200) to be observed plotted against the wavelength; and selecting the wavelength.which is closest to the complementary wavelength of the single representative wavelength value in the xy color value diagram, as a reference wavelength value, and illuminating the object to be observed (200) and the background with the light of the representative wavelength value and light of the reference wavelength value.

A method for adjusting color rendering index of a light source and a stage light fixture are provided. The light source has a first LED chip set with a first color rendering index and a second LED chip set with a second color rendering index. The range of chromaticity differences of a target spectrum and color differences of 14 Munsell color samples of the target spectrum are defined according to a target spectral power distribution of a reference light source under a target color rending index and a target color temperature. The light intensity control parameter K1, K2 of the first LED chip set and the second LED chip set are adjusted, and a relative spectral power distribution of synthesized lighting of the controlled light source is calculated to search for values of K1 and K2 enabling the relative spectral power distribution to fall within the range.

The invention relates to a mariculture identification method based on active and passive remote sensing wave band coupling color features. The method comprises the following steps: acquiring optical remote sensing data and radar remote sensing data of a seawater area to be identified; performing feature extraction on the radar remote sensing data to obtain structural feature information; performing feature extraction on the optical remote sensing data to obtain spectral feature information; mapping the structural feature information and the spectral feature information to a CIE color space to obtain CIE color index features; and performing classification prediction based on the CIE color index features, and dividing the seawater region to be identified into a seawater culture region and a non-culture region. By adopting the method, the detection accuracy of the mariculture area can be improved.

The application provides an LED multi-light color regulation method and system based on a multi-target evolution algorithm, which firstly acquires the spectrum and electric power data of each single-color LED, and pre-processes the data by combining a cubic spline interpolation method and a fitting function; then each light color index such as a color coordinate, a color rendering index, a color temperature, an SDCM value and power consumption is optimized by designing an evaluation function; the core of the algorithm is to use a multi-target genetic algorithm to iteratively optimize the population through individual evaluation, survival of the fittest, genetic and mutation operations until the optimal PWM combination meeting all the light color index requirements is found. Specifically, the method has the advantages of strong flexibility, good expansibility and the like, can adapt to different LED channel configurations, and provides a light color regulation scheme with strong pertinence, and is particularly suitable for factory adjustment of a phosphor-free multi-primary color LED lamp, and provides an efficient and automated solution for light color optimization.

The application relates to a pipeline water quality monitoring and automatic control device based on color detection, relating to the technical field of water quality monitoring and pipeline control, which comprises a color detection device, a control module, a sewage discharge valve and a recycled water control valve. The color detection device is arranged on a sampling branch connected with a main pipeline, adopts a self-provided light source to detect the color index of water flowing through the sampling branch, and provides a water quality state signal for the control module. The sewage discharge valve is arranged on a pipeline between the main pipeline and a sewage discharge port. The recycled water control valve is arranged on a pipeline between the main pipeline and a recycled water outlet. The control module connects the sewage discharge valve or the recycled water control valve to be opened according to the water quality state signal provided by the color detection device. The device can eliminate the interference of ambient light, has high detection precision, can realize a double-threshold judgment mechanism, and is automatically controlled without needing personnel on duty.

The present invention proposes a consistency correction method and device based on multi-source satellite inversion of water color index. The method comprises: converting the surface reflectance of the multi-source satellite sensor of the target water area into remote sensing reflectance, performing water body range extraction on the multi-source satellite sensor to determine the water body range, and removing multi-category interference pixels from the image of the surface reflectance within the water body range to obtain an effective remote sensing reflectance; calculating the chromaticity angle inverted by the multi-source satellite sensor based on the effective remote sensing reflectance and the CIE chromaticity system; performing spectral response correction on the chromaticity angle inverted by the multi-source satellite sensor using a polynomial spectral correction model constructed based on a water body optical simulation data set; performing systematic deviation correction on the chromaticity angle of the multi-source satellite sensor after the spectral response correction using a cross-calibration correction model established based on synchronous observation data of the multi-source satellite sensors; and determining the water color index of the target water area based on the chromaticity angle after the systematic deviation correction.

The application provides a kind of LED light source uniformity and color deviation detection method, comprising: setting the environmental parameter of constant temperature and humidity test chamber, the environment in the box is monitored in real time by temperature and humidity sensor, when detecting that temperature and humidity deviate from set value, trigger temperature and humidity control system to adjust;According to the initial color characteristic database, LED light source is placed in the constant temperature and humidity test chamber to carry out accelerated aging test, and the spectral data of light source at different time points are obtained by using spectral analyzer;The chromaticity coordinates, color temperature and color rendering index corresponding to the spectral data at different time points are calculated, the color deviation amount of LED light source is calculated, and the change curve of color deviation with time is fitted;According to the accelerated aging test result of LED light source, the color maintenance life of light source under high temperature and high humidity environment is calculated, and the color deviation detection is completed through the color stability uniformity index of LED light source.

This invention provides a method, system, and readable storage medium for searching white dwarfs using a multicolor photometric system, comprising: S1: acquiring a multicolor magnitude table containing extinction-corrected magnitudes for the u, g, and i bands; S2: calculating the color index g-i and composite color index (u-g)-1.5(g-i) for each star based on the multicolor magnitude table; S3: marking the positions of all stars on a two-color map with g-i as the abscissa and (u-g)-1.5(g-i) as the ordinate; S4: selecting stars falling within a pre-defined white dwarf distribution region as white dwarf candidates. This invention analyzes SAGES multicolor photometric data to find an optimal color combination, constructs a two-color map, and delineates exclusive distribution regions for white dwarfs, thereby achieving rapid and high-purity screening of white dwarfs from large-sample survey data.

Illumination method for an object to be observed and a background, the illumination method comprising the following steps: while irradiating the object to be observed and the background with a first light source, obtaining the relationship between wavelength and spectral radiant luminance for the object to be observed, determining one or more representative wavelengths based on the wavelength corresponding to the maximum value of the spectral radiant luminance related to the object to be observed and the wavelength, the first light source being a light source that emits light having an average color rendering index of 40 or more, a color temperature in the range of 3000 K to 10000 K, and a continuous spectrum in the wavelength range of 380 nm to 780 nm; while irradiating the object to be observed and the background with the first light source, obtaining the relationship between wavelength and spectral radiant luminance for the background, determining one or more comparison wavelengths based on the wavelength corresponding to the maximum or minimum value of the spectral radiant luminance related to the background and the wavelength; and irradiating the object to be observed and the background with light of the representative wavelength and the comparison wavelength.

The present invention discloses a method and system for extracting the effective leaf area index (ELAI) based on point cloud data. First, three-dimensional point cloud data containing planted areas is acquired. Then, using the color and geometric information of the point cloud data, the color index (EXG) of the point cloud data is calculated, along with a set of height and slope thresholds. The Otsu filter method, combined with an improved slope-based filtering method, is used to filter out exposed ground points, thereby obtaining a crop point cloud. The crop point cloud is then projected onto an upper hemisphere with a radius of 1, then onto a plane and binarized to obtain a hemispherical image. Finally, the hemispherical image is divided into 18 concentric rings at a zenithal perspective, and the porosity at specific perspectives is calculated to estimate the ELAI. This method filters out remaining exposed ground points, avoiding the problem of using only the Otsu filter method to automatically determine the color index (EXG) threshold to filter out ground points, which can result in a small number of ground points remaining and thus lead to an overestimation of the ELAI.

A sensor device 10 includes a light projection unit 14, a light reception unit 15, an RGB value acquisition unit 22, a color index value calculation unit 24, and a determination unit 16. The light projection unit 14 projects light. The light reception unit 15 detects reflected light from an area illuminated with the light projected from the light projection unit 14. The RGB value acquisition unit 22 acquires color information about an object present in the illumination area on the basis of the reflected light detected by the light reception unit 15. The color index value calculation unit 24 calculates a single color index value on the basis of the R value, G value, and B value included in the color information acquired by the RGB value acquisition unit 22. The determination unit 16 compares the color index value calculated by the color index value calculation unit 24 with a specific threshold value to determine whether or not an object has been detected.