176 results about "Color chart" patented technology

The invention relates to the technical field of computer vision, and discloses a vehicle paint make-up color matching method based on computer vision, and the method comprises the steps: collecting a vehicle paint image in real time through an industrial camera, constructing a multi-dimensional color feature extraction system after preprocessing, and building a color feature database through a color space conversion technology; and positioning a target color card by combining a feature matching algorithm. Meanwhile, a historical paint make-up case information base is constructed, a multi-factor weight distribution model is established, an optimal matching scheme is solved by adopting an improved particle swarm optimization algorithm, and finally a result is output through an interactive verification platform and tracked and fed back. According to the method, multiple factors are comprehensively considered, the precision and efficiency of color matching are improved, and the method is suitable for paint make-up color matching of vehicles of different vehicle types, years and paint surface types and has high practicability and popularization value.

The invention discloses a method and device for detecting color reducibility of a mobile phone camera and a medium, and relates to the technical field of image quality detection.The method comprises the steps that after geometric alignment is conducted on a color card image set, color block areas are divided, and a cross-light-source color block observation matrix is obtained through color block feature extraction; converting the cross-light-source color block observation matrix into a target color space coordinate, and performing illumination correction to obtain a cross-light-source color coordinate matrix; inputting the cross-light-source color coordinate matrix into a deep learning model, outputting a color block level high-dimensional color embedding matrix, and obtaining a high-dimensional color embedding vector set corresponding to the tested mobile phone camera in combination with an attention weight; calculating a color reducibility error index based on the high-dimensional color embedding vector set in combination with the standard reference library; and performing qualification judgment according to the color reducibility error index to generate a qualification detection conclusion. According to the invention, a stable and reliable technical basis is provided for camera quality detection under a multi-light-source imaging condition.

The invention discloses a color correction method, system and device based on cooperative flight of double unmanned aerial vehicles, a medium and a product, and relates to the technical field of agricultural detection. According to the method, a double-unmanned-aerial-vehicle cooperative flight mode is adopted, one unmanned aerial vehicle (namely the first unmanned aerial vehicle) flies at a high height for aerial photographing, the other unmanned aerial vehicle (namely the second unmanned aerial vehicle) carries a color card to synchronously fly at a low height, multiple farmland images containing the color card are obtained, a color correction matrix is constructed based on the RGB value of the color card in the farmland images and the actual RGB value of the color card, and the color correction matrix is obtained. Color correction under a dynamic illumination condition is realized, the problem of color distortion in a low-altitude remote sensing imaging process of the unmanned aerial vehicle is overcome, the reusability of cross-sensor data is improved, accurate acquisition of crop colors by the unmanned aerial vehicle in a field environment is realized, and reliable data support is provided for accurate crop management.

The invention discloses a semi-supervised non-contact neonatal jaundice home intelligent early warning method based on image calibration, and the method comprises the steps: building a camera response function database, and building a color constancy depth model and a skin region segmentation network; designing a strong and weak enhancement strategy by using a large amount of label-free home data, constructing a time and context comparison learning module, and performing self-supervised training on a feature encoder; a small amount of labeled hospital data and a large amount of unlabeled family data are combined, and semi-supervised fine tuning is realized through pseudo label generation and supervised comparative learning; image sequences continuously uploaded by a user are input into the model, multi-day prediction of the bilirubin level is achieved, prediction uncertainty is quantified in combination with a Bayesian method, the risk boundary is dynamically adjusted, and personalized early warning is provided. According to the method, a user does not need to use a physical colorimetric card, color measurement errors caused by model differences of mobile equipment and variability of household illumination are inhibited from a data source, and the accuracy and robustness of subsequent jaundice assessment are improved; through a training framework combining self-supervised pre-training and semi-supervised fine tuning, the understanding ability and generalization performance of the model for the sequential characteristics of jaundice are improved.

The invention discloses synchronous test paper for Fe < 3 + > and Fe < 2 + > as well as a preparation method and application of the synchronous test paper, and effectively solves the problem that high-concentration Fe < 3 + > and Fe < 2 + > in a boiler chemical cleaning solution are difficult to rapidly, accurately and simultaneously detect. The detection test paper is provided with isolated first and second color developing regions, provides an independent space for Fe < 3 + > and total iron detection, and is anti-interference and accurate. A potassium thiocyanate-hydrochloric acid color developing agent is specially used for measuring Fe < 3 + > in the first color developing area, a phenanthroline-ascorbic acid color developing agent is used for measuring total iron in the second color developing area, and the concentration of Fe < 2 + > is calculated in a combined mode. A standard colorimetric card is matched, color blocks accurately correspond to the concentration range (0-5000 mg / L), the common iron ion concentration is covered, and a comparison basis is provided for detection. During detection, information can be rapidly and visually obtained by comparing the color of the color developing area with the color chart, operation is easy and convenient, complex equipment and professionals are not needed, and field requirements are met. And the scheme is resistant to interference of high-concentration and complex components, and the result is real and reliable.

Provided are a color correction matrix optimization method, an electronic device, and a medium. The method includes performing correction processing on a color source matrix of an acquired color chart image based on a color correction matrix to obtain an output color matrix; determining a global hue error and a saturation constraint regularization term based on Lab coordinates of the output color matrix and Lab coordinates of a target color matrix of a target color chart image and constructing a loss function; and updating the color correction matrix based on a value of the loss function until the value of the loss function converges to obtain an optimal color correction matrix to perform color correction on a to-be-processed image based on the optimal color correction matrix.

An inkjet printing apparatus includes: a positional displacement amount calculation unit configured to, during printing processing, calculate a positional displacement amount of printing paper in a paper width direction based on colorimetric data obtained by colorimetry of a color chart by a colorimeter; a colorimeter movement mechanism configured to move the colorimeter; and a colorimeter movement control unit configured to control an operation of the colorimeter movement mechanism based on the positional displacement amount calculated by the positional displacement amount calculation unit.

The invention relates to the technical field of multi-spectral colorimeter inter-table difference reduction, and discloses a method and device for reducing multi-spectral colorimeter inter-table difference, electronic equipment and a medium, and the method comprises the steps: measuring a set number of color cards to obtain measurement matrixes of different colorimeters, and then selecting one colorimeter from the preset colorimeter group as a standard colorimeter, taking the rest colorimeters as to-be-calibrated colorimeters, and establishing a conversion relation between the standard measurement matrix and the to-be-calibrated matrix. The method has the beneficial effects that the consistency between the to-be-calibrated colorimeter and the standard colorimeter is greatly improved, the calibration procedure is simplified, the reliability and consistency of the calibrated colorimeter in practical application are also improved, the applicability of the multispectral sensor in the corresponding color measurement field is enhanced, and the method is suitable for popularization and application. The cost performance and application universality of the multispectral colorimeter are remarkably improved, and a more stable and accurate color measurement solution is provided for various industries.

To provide an absorbent article in which it is easy to recognize that the absorbent article is a product suitable for wearing for a long time and which can be used by a user without anxiety.SOLUTION: An absorbent article (1) includes an absorbent core (11) in which an average basis weight of a superabsorbent polymer is equal to or greater than 270 g / m2. The absorbent article includes a first colored region (51) and a second colored region (52) in a case where the diaper (1) in a developed and stretched state is viewed from a non-skin side in a thickness direction, a total area of the first colored region (51) being equal to or greater than 50% of an area of the absorbent article (1). When 2071U, 2072U, 2073U, etc. in a color sample of PANTONE are represented as first color group, the first colored region (51) is a region of a color corresponding to any of the first color group, When 100U, 101U, 102U, etc. in the color sample of PANTONE are represented as a second color group, the second colored region (52) is a region of a color corresponding to any of the second color group.SELECTED DRAWING: Figure 1

An information processing device acquires a learning image in which a subject for learning and a color chart appear. The information processing device calculates a correction coefficient for correcting a color appearing in the color chart in the learning image to a reference color as a reference. The information processing device generates learning data in which an image of a portion of the subject for learning in the learning image is associated with the correction coefficient. The information processing device generates a trained model that outputs a correction coefficient for correcting a color of an image in which a subject appears in response to an input of the image based on the learning data.

The present disclosure relates to a color card generation method, an image processing method, apparatuses, and a readable storage medium. The method includes: transferring first standard colors in a first color display standard into colors in a second color display standard, to obtain a first color set; performing channel separation on the second standard colors in the first color set, to acquire color components of the second standard colors respectively in a target color channel; adjusting the color components of the second standard colors respectively in the target color channel, to obtain a second color set; and generating a target color card in the second color display standard, according to the second color set, wherein, the target color card is used for implementing a target effect.

The present application belongs to the technical field of oil use peony phenotype parameter automatic extraction method, especially relates to a kind of oil use peony phenotype parameter automatic extraction method and system based on multi-organ image analysis, obtain the high-resolution original image of oil use peony multi-organ containing ColorChecker24 standard color card, the organ at least includes petal, blade, fruit pod;Color correction and geometric correction are executed to original image, 24 color blocks of color card are positioned using computer vision algorithm, color conversion matrix is constructed to map image from device-dependent RGB space to standard color space, while calculating pixel scale based on color block physical size;Four corner points of bearing tray are detected for fruit pod image, and perspective transformation matrix is constructed to complete perspective distortion correction.

In a printing device, a print head performs printing based on image data. The image data represents an original image including a plurality of original pixels. The controller displays a preview image based on the image data. In the preview image, each preview-image pixel corresponds to one of the plurality of original pixels and has a color based on a color of the corresponding original pixel. The controller receives information on a preview-image pixel specified by a user. The controller sets an expanded region in the original image on the basis of a printing resolution. The expanded region includes original pixels having an original pixel corresponding to the specified preview pixel. The controller generates patch chart print data based on color values of original pixels in the expanded region. The controller controls the print head to print the patch chart image.

The application discloses a color camera color correction method, system, device and medium, the correction method comprises: through shooting the area light source to complete the lens shadow correction and white balance correction of the color camera; the XYZ value of the area light source is measured using a color measuring device, and the light source correction coefficient corresponding to the different areas of the area light source is calculated; the transmission color card is placed, and the transmission light of the area light source passing through the color card is measured using the color measuring device to obtain target color data; the color camera is started and the measured color data is collected, so that the correction matrix is fitted based on the target color data. The application carries out color correction of the color camera based on the color card under the irradiation of the actual area light source, avoids the influence of the actual area light source on the true value of the color card provided by the manufacturer, solves the area light source shielding problem during the measurement of the target color data through the transmission color card, solves the uniformity problem of the area light source through the light source correction coefficient, and significantly improves the accuracy of the color correction as a whole.

The present application discloses a method for spectral prediction and closed-loop feedback wide-width corrugated box extended gamut flexographic pre-printing, belonging to the field of packaging engineering and printing technology. The method comprises: establishing a dot gain mapping function based on the Yule-Nielsen correction model by testing the roughness, ink absorption and surface energy of the corrugated paper; printing a CMYKOGV seven-color characteristic color card to generate an adaptive ICC profile; using the CIEDE2000 color difference formula and constant hue angle mapping algorithm for gamut compression and color separation; selecting a low-hardness flat-top dot flexographic plate and configuring a anisotropic screen roller; introducing the Walker-Fetsko rheological ink transfer equation during printing, combining with real-time feedback of an online spectrophotometer to dynamically adjust the printing pressure and ink viscosity, and realizing closed-loop compensation. The present application realizes high-precision simulation of more than 90% of the PANTONE spot color library, completely gets rid of the dependence on spot colors, significantly improves the color stability and production efficiency of wide-width flexographic printing, and is suitable for extended gamut pre-printing production of high-quality corrugated boxes.

This invention provides a colorimetric detection method and related apparatus for meat freshness based on a dynamic reference library. The method includes: acquiring a test strip image and meat type information of the meat sample to be tested; determining the region of interest (ROI) of the test strip image, extracting features from the ROI to obtain a feature vector, wherein the feature vector is a feature vector composed of RGB feature values; calculating a predicted concentration value and a confidence index based on the feature vector and a user-defined dynamic reference library using a K-nearest neighbor regression algorithm, wherein the dynamic reference library is constructed based on the mapping relationship between concentration gradient values ​​and RGB feature values ​​of a standard color chart image set and freshness threshold ranges for different meats; and comparing the predicted concentration value with the corresponding freshness threshold range for the meat to determine the freshness level information of the corresponding meat sample. Based on this, this invention can achieve high-precision detection of the freshness of different meats.

The utility model relates to concentration test strip comparison technical field, specifically is a kind of positioning structure for concentration test strip comparison, including locating disc, clamping groove, comparison groove, slide rail and test strip groove, the clamping groove is filled with colorimetric card;The moving disc is equipped in the comparison groove, and the test strip holder is equipped in the moving disc corresponding test strip groove;The clamping groove on the surface of locating disc is positioned to colorimetric card, the comparison groove is fixed to slide rail and stores moving disc, the test strip holder is put into test strip holder by the test strip groove in the moving disc top, the test strip is carried by test strip holder, under the cooperation of slide rail, the moving disc makes test strip to carry out comparison work by left and right sliding at the bottom of corresponding colorimetric card, after comparison, personnel can hold handle and take out test strip holder from test strip groove and replace test strip, and it is convenient to operate.

1. The name of the design product: color card (C11). 2. The use of the design product: used for nail polish color color selection. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.

The invention discloses a color correction method and system, and belongs to the technical field of image processing, and the method comprises the steps: extracting a chromaticity quantization DCT coefficient, an initial chromaticity quantization table and a standard color card calibration matrix of a compressed image; wherein the chroma quantization DCT coefficient comprises a DCT coefficient of a blue chroma component and a DCT coefficient of a red chroma component; generating a chromaticity correction matrix according to the DCT coefficient of the blue chromaticity component of the compressed image, the DCT coefficient of the red chromaticity component of the compressed image and the standard color card calibration matrix; correcting the frequency domain chromaticity of the compressed image according to the chromaticity correction matrix; generating a final chroma quantization DCT coefficient according to the initial chroma quantization table and the chroma correction matrix; outputting a compressed image code stream according to the final chromaticity quantization DCT coefficient and the entropy coding table; according to the method, chromaticity correction is directly carried out in the frequency domain of the compressed image, quantization table optimization and chromaticity statistical feature modeling are combined, the problems of calculation complexity and distortion caused by decompression processing are avoided, and the color fidelity of the compressed image is improved.

This invention relates to an automatic image color matrix optimization processing method and apparatus. The method includes: acquiring a test color chart image; determining a first color matrix corresponding to the test color chart image, a standard color matrix corresponding to a standard color chart image, and a color difference correction matrix; processing the first color matrix using the standard color matrix and the color difference correction matrix to obtain a first correction matrix; determining a first saturation corresponding to the first correction matrix; processing the first correction matrix using the first saturation and a preset saturation to obtain a second correction matrix; and determining the second correction matrix as the target color matrix corresponding to the test color chart image. Therefore, this invention can automatically adjust the color matrix in terms of chroma and saturation, ensuring the image quality of the camera meets requirements, improving work efficiency, and is easy to operate.

The application discloses a kind of based on the color card construction and color loading method, device and equipment of printing material, it is related to inkjet printing technical field.The method is by creating standard electronic color card and standard color card database, then standard electronic color card is printed to the surface of several different printing material materials, obtains several standard physical color cards, then according to the material quality of printing material selects the standard physical color card of same material (marked as reference color card), finds target color and its color number name in the reference color card, then according to the color number name of target color, obtains corresponding color value from standard color card database and loads into the to-be-printed artwork, so as to ensure that the to-be-printed artwork after being input into digital printing equipment for printing is completed, and the color of the printed artwork is consistent with the target color.

This invention discloses a color calibration method for a structured light camera based on color temperature consistency, belonging to the field of camera calibration technology. The method includes: constraining color temperature consistency based on the linear relationship between the exposure time of the RGB light source and the image grayscale in the structured light camera; performing light uniformity correction on the structured light camera based on color temperature consistency; performing white balance correction on the structured light camera after completing the light uniformity correction; and completing the color calibration of the structured light camera using a color chart while ensuring the white balance constraint. Utilizing a grayscale sensor combined with an RGB light source for color calibration reduces hardware costs and system complexity while maintaining the high sensitivity and high signal-to-noise ratio advantages of the structured light camera.

The invention relates to a high-voltage component, in particular for an electric vehicle, comprising a polymer composition based on at least one polyester and 10, 10 '-oxybis-12H-phthalazin-12-one, and to the use of 10, 10'-oxybis-12H-phthalazin-12-one for the production of a polyester-based product, in particular a high-voltage component for an electric vehicle, comprising a polymer composition based on at least one polyester and 10, 10 '-oxybis-12H-phthalazin-12-one. With the proviso that the color difference [Delta] E lt of the L * a * b * coordinate of the color number starting from '2' in the RAL colorimetric chart; the invention further relates to the use of 10, 10 '-oxybis-12H-phthalazin-12-one for marking polyester-based products as high-voltage components, in particular for marking polyester-based products as high-voltage components.

The system comprises a laminated 5 diagnostic strip including a backing layer (105), an absorbent pad layer (106) configured for controlled capillary transport of milk, and a reagent deposit layer (107) defining multiple spatially separated dry reagent zones. The reagent zones include a pH indicator zone (101), a leukocyte esterase detection zone (102), a hemoglobin detection zone (103), and a nitrite detection zone (104), each adapted 10 for operation in the milk matrix. A calibrated sample application point (108) receives a predefined volume of untreated milk and fluidically communicates the sample to the reagent zones via the absorbent pad layer. Colorimetric reactions develop in a result window area (109), enabling simultaneous visual interpretation without analytical instruments, typically within three minutes. The invention further 15 includes a moisture-controlled storage container comprising desiccant elements (204, 205), a reference color chart (208), and a calibrated pipette (209), ensuring reagent stability and standardized use.

The invention relates to the field of image processing and machine learning, and particularly discloses a pericarpium citri reticulatae aging year detection method based on color characteristics, which comprises the following steps: S1, pericarpium citri reticulatae sample treatment and image acquisition calibration: crushing and tabletting dried pericarpium citri reticulatae, shooting together with a standard color card in a preset light environment, and fixing shooting parameters; s2, color feature extraction and enhancement: performing color correction based on a known color value of a standard color card, and extracting an RGB value and an RGB derivative ratio of the dried orange peel tablets; and S3, year prediction: inputting the features extracted in S2 into a multiple linear regression model, fitting to obtain a function of the aging year Y and RGB, and obtaining the aging year of the dried orange peel. The method is high in detection accuracy, the color features of the dried orange peel are analyzed through the multiple linear regression model, the reliability of year identification is effectively improved, the whole detection process does not need to depend on expensive instruments such as an infrared spectrum and a high-resolution mass spectrum, operation is easy and convenient, and the method is easy to popularize and apply in medium and small-scale production and circulation scenes.

The invention relates to fluorescent test paper for visually, efficiently and accurately detecting Cu < 2 + > and a preparation method of the fluorescent test paper, and particularly relates to fluorescent carbon dots synthesized by taking citric acid and diethylenetriamine as raw materials and using a micro-channel reactor, and relates to the technical field of nanomaterials. The fluorescent test paper is prepared by the following steps: i) taking cellulose test paper as a carrier and uniformly carrying a large number of carbon dots; and ii) a copper ion solution can be dropwise added on the test paper to analyze the change of RGB values to prepare a colorimetric card, and the color change of the test paper is judged by combining the colorimetric card and a fluorescent flashlight, so that the copper ions are visually and quantitatively analyzed. During detection, the carbon dots and Cu < 2 + > are subjected to fluorescence quenching reaction, so that visual accurate detection can be realized. The method is accurate, rapid and convenient to operate, visual detection of ions is achieved, and a novel efficient scheme is provided for real-time detection of Cu < 2 + > in the industry.

The invention relates to a color distance [Delta] Elt from Lab coordinates to the number of colors of a RAL color card starting with '2'; the invention relates to an electric vehicle component comprising a polymer composition based on at least one polyamide and a colorant having an average particle size d50 in the range of 1 to 12 m, which can be determined by laser diffraction according to ISO 13320, containing 9, 9, 10, 20 in a ratio of 1: 1: 0.8-1.5 to 1: 1.5: 0.8-1.5, and comprising at least one polymer composition based on at least one polyamide and a colorant having an average particle size d50 in the range of 1 to 12 m, which can be determined by laser diffraction according to ISO 13320. The compound is prepared from 9, 10, 9 '-oxybis-12H-phthalocyanine-12-ketone, 9, 10-oxybis-12H-phthalocyanine-12-ketone, 9, 10-oxybis-12H-phthalocyanine-12-ketone, 10, 10'-oxybis-12H-phthalocyanine-12-ketone, 9, 10-oxybis-12H-phthalocyanine-12-ketone and 10, 10 ' And to a composition having an average particle size d50, measurable according to ISO 13320, in the range of 1 to 12 m, containing 9, 9, 10, 11, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, the colorants of 9, 10-oxybis-12H-phthalazin-12-one, 9, 10-oxybis-12H-phthalazin-12-one, and 10, 10 '-oxybis-12H-phthalazin-12-one are used in the polymer composition to produce a color distance [Delta] Elt from the Lab coordinate to the color number of the RAL color card starting at "2"; and the colorants of 9, 10-oxybis-12H-phthalazin-12-one, 9, 10-oxybis-12H-phthalazin-12-one, and 10, 10'-oxybis-12H-phthalazin-12-one. The invention relates to a polyamide-based electric vehicle component, in particular for reducing color streaks in the production of polyamide-based electric vehicle components.