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19 results about "Color target" patented technology
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Printing color closed-loop control system based on spectral analysis
The invention discloses a printing color closed-loop control system based on spectral analysis, and relates to the technical field of computer processing, and the system comprises the following steps: S01, collecting the spectral reflectivity data of a plurality of key color blocks on a printed matter measurement and control strip in real time through an online high-speed spectrometer at the frequency of not less than 100 color blocks per second; s02, constructing a color prediction model, wherein the model receives the spectral reflectivity data and outputs absorption scattering characteristics, the spectral transmittance of ink and dot expansion, trapping and overprinting effects in the printing process; s03, setting a dynamic tolerance threshold value delta Et based on a chromatic aberration formula according to the color precision requirement of the printed matter, and judging the absorption and scattering characteristics, the spectral transmittance of the ink and a grading tolerance interval in which the dot expansion, trapping and overprinting effects in the printing process are consistent with visual perception; and S04, converting the spectral reflectivity data acquired in real time into a CIELAB color space irrelevant to equipment, and comparing the spectral reflectivity data with a preset standard color target value. According to the method, the problems of different standards and color drift caused by artificial experience difference and visual fatigue are solved.
Owner:HANGZHOU DEKA DECORATION NEW MATERIAL CO LTD
A tooth three-dimensional reconstruction method and device based on multi-view geometric prior and mirror Gaussian representation
This invention provides a method and apparatus for 3D tooth reconstruction based on multi-view geometric priors and specular Gaussian representation. The method first acquires multi-view image data containing teeth and gingiva. A multi-view geometric estimation module predicts and globally aligns dense 3D point maps to obtain an initial point cloud, camera intrinsic and extrinsic parameters, and a depth map. Based on this, a Gaussian primitive set is initialized and input into a specular Gaussian reconstruction module, where relevant parameters are combined to optimize the reconstruction. This module introduces depth and normal losses based on the color target, supervises and reduces the weight of highlight regions within the region of interest, and finally outputs the 3D reconstruction result. This invention can improve the stability and geometric accuracy of tooth reconstruction under high reflectivity and weak texture, enhance specular reflection and highlight expression capabilities, and balance the detailed reconstruction of tooth hard tissue with the geometric and appearance effects of gingival soft tissue, thereby improving the integrity of oral scene reconstruction and its clinical application value.
Owner:NANJING STOMATOLOGICAL HOSPITAL
A single-photon multi-wavelength imaging system and method based on a physical driving model
The application provides a single-photon multi-wavelength imaging system and method based on a physical driving model, and belongs to the technical field of single-pixel multi-wavelength imaging; the application solves the problems of being easily affected by noise and poor imaging quality of existing single-photon multi-wavelength imaging schemes in extreme environments; the application comprises a multi-wavelength modulation illumination module, a spatial modulation coding module and a detection imaging module; the multi-wavelength modulation illumination module uses signal light with different modulation repetition frequencies to illuminate a color target object and scatter the color target object to the spatial modulation coding module; the spatial modulation coding module spatially encodes the color target object and transmits the color target object to the detection imaging module; the detection imaging module captures the modulation signal light and transmits the modulation signal light to a computer; a physical driving model program is prewritten in the computer; the physical driving model comprises a measurement value denoising module and a physical driving image reconstruction module; and finally, a high-quality color target object reconstruction image is obtained; the application is applied to photon imaging.
Owner:TAIYUAN UNIVERSITY OF TECHNOLOGY
Symmetrical narrow-band spectral image driven multi-primary color display method and device
The application discloses a kind of symmetric narrow-band spectral image driven multi-primary color display method and device, it is related to color image display technical field, method includes: based on the spectral reflectivity of target to be photographed calculation three stimulus value;Based on the spectral transmittance of any channel in the narrow-band spectral camera to be used, the spectral emission power of corresponding primary color channel in the multi-primary color display screen to be used and the spectral reflectivity of target to be photographed, the three stimulus value of color output by the multi-primary color display screen to be used is calculated;According to the three stimulus value of target to be photographed and the three stimulus value of color output by the multi-primary color display screen to be used, color difference data is calculated;Based on color difference data, the center wavelength and bandwidth of any channel in the narrow-band spectral camera to be used are adjusted;Image shooting is carried out to target to be photographed by the adjusted narrow-band spectral camera to be used, and the image obtained by shooting is used as the driving image of the multi-primary color display screen to be used, to obtain target color display image.The application improves the accuracy of color reproduction of color target scene.
Owner:BEIJING INST OF TECH +1
Slow-moving small target trajectory detection method based on multi-frame coloring in reverberation background
This invention proposes a slow, small target trajectory detection method based on multi-frame coloring in a reverberant background. It employs the GMM or RPCA method, and obtains a spliced tensor through direct or selective splicing. The spliced tensor is then colorized to obtain a colored trajectory detection result. This invention utilizes the inter-frame positional migration continuity of slow, small targets, the inter-frame positional randomness of dynamic reverberation, and the inter-frame positional invariance of static reverberation to detect continuous target trajectories. In the detection results, static and dynamic reverberation are colored with a single color, and the continuous target trajectory is represented by color gradient stripes. The basic principles and implementation scheme of this invention have been verified through synthetic data processing results. The results show that, compared with traditional methods, the proposed colored trajectory detection method fully utilizes the frame-domain differences between slow, small target trajectories and dynamic and static reverberation, resulting in better continuous trajectory detection performance.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Method, device, medium and equipment for preparing gingival shade guide
The invention relates to the technical field of oral medicine, and particularly provides a method, device, medium and equipment for preparing a gingival shade guide, and the method can comprise the following steps: clustering color data sets measured at gingival color measurement positions of different objects to obtain a plurality of color clusters; wherein the color data set comprises color data of a plurality of data points; the color data comprises a plurality of dimension values; determining a color target of each color cluster in the plurality of color clusters; screening a candidate cluster set according with a preset coverage rate from the plurality of color clusters; inputting the color target of each candidate cluster in the candidate cluster set into a pre-trained color prediction model to obtain a preparation formula; the preparation formula is used for preparing the gingival shade guide. According to the embodiment of the invention, the preparation accuracy of the gingival shade guide can be improved.
Owner:PEKING UNIV SCHOOL OF STOMATOLOGY
Method and system for electronic component soldering inspection on a bga substrate
The application relates to the technical field of welding detection, in particular to a BGA substrate electronic component welding detection method and system, which comprises the following steps: acquiring a color target image and performing color space conversion on the color target image, extracting a brightness component and a chrominance component; calculating a color difference value of the BGA substrate in the color target image compared with a standard BGA substrate based on the brightness component and the chrominance component; adjusting a standard threshold corresponding to the standard BGA substrate based on the color difference value to obtain an adaptive threshold corresponding to the BGA substrate in the color target image; extracting the electronic component welding position in the color target image by using the adaptive threshold corresponding to the BGA substrate in the color target image, detecting the welding position, and outputting a detection result. The application can accurately separate the red electronic component welding area from the blue substrate background in the case that the substrate has color difference, so that the stability and reliability of the welding position detection are maintained.
Owner:MICA TECHSUZHOUCO
Method and system for color point calibration of light source projector
The present invention relates to image projection and provides a method and system for performing color calibration of light sources and correction towards a color target, for example a whitepoint target. The calibration and correction considers the ambient temperature and that the projector output has an arbitrary dimming level. The correction can be made automatic and can be performed by an operator in the field by pressing a button.
Owner:BARCO NV
Target color identification and out-of-control control method for unmanned aerial vehicle
The invention provides a target color identification and out-of-control control method for an unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. The method comprises the following steps: identifying a static color target through an HSV color space model and a threshold segmentation algorithm; executing an impact task on the color target by using an unmanned aerial vehicle propeller; performing failure detection on the unmanned aerial vehicle after the task is completed; and determining an unmanned aerial vehicle control strategy according to the failure detection result. According to the method, an image collected by an unmanned aerial vehicle is converted into an HSV (hue, saturation and value) space after being pre-processed, and a color area of a target is segmented through preset hue, saturation and brightness thresholds; and the target potential identification accuracy is improved. The failure detection result of the unmanned aerial vehicle is firstly judged, the control strategy after failure is determined according to the failure detection result, stable landing of the unmanned aerial vehicle is achieved, and damage to the unmanned aerial vehicle is reduced.
Owner:SHENYANG AEROSPACE UNIVERSITY
Gradient color rapid matching method and device, equipment and storage medium
The invention discloses a gradient color rapid matching method and device, equipment and a storage medium, and relates to the technical field of image processing. The method comprises the following steps: adjusting an original highest color value and an original lowest color value of a to-be-processed gradient color block in an original image, and obtaining a first gradient color target map; printing the first gradient color target map to obtain a second gradient color target map; comparing the to-be-processed gradient color block with the second gradient color target map to obtain a replacement gradient color block with the printing effect closest to the to-be-processed gradient color block; and adjusting the color value corresponding to the to-be-processed gradient color block according to the color value of the replaced gradient color block, thereby ensuring that the color effect of the gradient color block part image in the subsequent printing image is consistent with that of the to-be-processed gradient color block image part in the original image. According to the method, the color value does not need to be repeatedly modified or adjusted, only one-time printing adjustment is needed, the method is simple and rapid, the gradual change color reduction effect is good, and the color effect is highly matched with the color effect of the gradual change part in the original image.
Owner:SHENZHEN HOSONSOFT CO LTD
An industrial endoscope packaging box
The present application relates to a kind of industrial endoscope packaging box for performance detection, including square packaging box body, at least one inner surface of the box cover, box bottom, side wall and dust wing of packaging box body is printed with target pattern for detecting the performance of industrial endoscope, target pattern includes one or more of color target pattern for color detection, resolution target pattern for resolution detection, depth of field target pattern for depth of field test, distortion target pattern for testing the geometric distortion of imaging system and defect simulation pattern for simulating defect;Any one side wall of packaging box body is provided with side wall through hole in the center.The present application makes the packaging box can be used as the target of industrial endoscope performance detection in addition to packaging, facilitates the quick detection verification of user to industrial endoscope.
Owner:SHENZHEN WEISHI OPTOELECTRONIC TECH CO LTD
Electronic component welding detection method and system for BGA substrate
The invention relates to the technical field of welding detection, in particular to a welding detection method and system for an electronic element on a BGA substrate, and the method comprises the steps: obtaining a color target image, carrying out the color space conversion of the color target image, and extracting a brightness component and a chrominance component; calculating a color difference value of the BGA substrate in the color target image relative to a standard BGA substrate based on the brightness component and the chrominance component; adjusting a standard threshold value corresponding to the standard BGA substrate based on the color difference value to obtain an adaptive threshold value corresponding to the BGA substrate in the color target image; and extracting the welding position of the electronic component in the color target image by using the self-adaptive threshold value corresponding to the BGA substrate in the color target image, detecting the welding position, and outputting a detection result. According to the invention, the red electronic component welding area and the blue substrate background can be accurately separated under the condition that the substrate has chromatic aberration, so that the stability and reliability of welding position detection are kept.
Owner:MICA TECHSUZHOUCO
A luminaire control method and device, a washing apparatus, and a storage medium
ActiveCN115623637BTableware washing/rinsing machine detailsElectrical apparatusColor targetEngineering
Owner:FOSHAN BEST ELECTRIC APPLIANCE TECH CO LTD
Displaying virtual objects in real scenes
In a method for displaying a virtual object (140), a scene (100) is imaged. The scene includes a target device (120). The target device includes a set of color target elements (121) having known reflectance properties and at least one illumination target element (122) having a plurality of known surface normals. At least one image of the scene is processed to determine measured colors of the color target elements and illumination and viewing conditions of the scene. Color transform parameters are computed by comparing the measured colors of the color target elements to the known reflectance properties. The virtual object is rendered for the determined illumination and viewing conditions. The rendered virtual object is aligned with the scene. A color transform is applied to the imaged scene and / or to the virtual object, and a superposition of the rendered virtual object and the imaged scene is displayed in real time on a display device (220) as illumination and / or viewing conditions change.
Owner:X RITE EUROPE GMBH
Water quality multi-parameter monitoring method, device and equipment
PendingCN121324280ATransmissivity measurementsColor/spectral properties measurementsColor targetEngineering
The invention relates to a water quality multi-parameter monitoring method, device and equipment. According to the water quality multi-parameter monitoring method, a shell is included, and a measuring cavity is defined by the shell; the light supplementing system is used for supplementing light to the measuring cavity; the ambient light catcher is used for detecting the intensity of ambient light in the measuring cavity; the target is provided with a plurality of color blocks; the image sensor module is used for penetrating through the water body in the measuring cavity to collect an image of the target; the self-cleaning mechanism is used for scraping dirt on the inner wall of the cavity; the main control processing unit is electrically connected with the light supplementing system, the ambient light catcher, the image sensor module and the self-cleaning mechanism. According to the invention, the ambient light capturer is used for coordinating the light supplementing system to supplement light to the measuring cavity, so that the background stability of the measuring light source is ensured, the acquisition and human eye errors are reduced by assisting the multi-color target, and the stability of the measuring cavity is always ensured through the self-cleaning mechanism.
Owner:GUOHONG ENVIRONMENTAL PROTECTION INSTR (KUNSHAN) CO LTD
Thermal transfer image printing method, apparatus, device, and storage medium
ActiveCN117944386BDuplicating/marking methodsPattern printingComputer graphics (images)Imaging quality
The application discloses a heat transfer image printing method, device and equipment and a storage medium, and relates to the field of inkjet printing technology. The method comprises the following steps: generating a first color target which does not include a black component, adjusting a white ink channel curve of a printer, printing the first color target onto a heat transfer medium to obtain a to-be-transferred color target; transferring the to-be-transferred color target onto a black printing substrate to obtain a second color target; and obtaining a color management configuration file of the printer according to the second color target. After the color management configuration file is obtained, the printer prints a to-be-printed image onto the heat transfer medium according to the color management configuration file, and the obtained heat transfer image can utilize the base color of the black printing substrate to form an image, thereby saving ink cost and improving the heat transfer image quality.
Owner:SHENZHEN HOSONSOFT CO LTD
Colorful holographic display transverse chromatic aberration compensation method
The invention discloses a compensation method for transverse chromatic aberration in color holographic display, and belongs to the technical field of holographic display. The method comprises the following steps: respectively extracting information of three scenes of red, green and blue in a color target image, and carrying out zoom compensation of chromatic aberration of magnification on the information of each channel; respectively calculating sub-holograms under the three channels by adopting an iterative algorithm; any color channel is selected as a reference wavelength, and the transverse chromatic aberration angle compensation amount required by the other two non-reference channels is calculated according to the difference among the red, green and blue wavelengths; the sub-holograms are loaded on the spatial light modulator, and on the basis of time division multiplexing, the transverse chromatic aberration of color holographic display is compensated by adjusting the incident angles of the two non-standard lasers irradiating on the spatial light modulator. The method is efficient, calculation is convenient and fast, compensation errors generated by a traditional method are effectively eliminated through accurate angle compensation, and the method has the advantages of being simple, low in cost, high in reproduction result quality and the like.
Owner:XIAN TECH UNIV
Methods, electronic devices, and storage media for determining a target colorant combination
The present application relates to a method, an electronic device and a storage medium for determining a target colorant combination. The method comprises: determining, based on a recipe adjustment intention for a target color and a device characteristic file of a device, color characteristics of ink channels of the device, constraint relationships between at least some of the ink channels, and influence weights of the ink channels on the target color, the device being configured with a plurality of ink channels; and determining, based on the recipe adjustment intention, the constraint relationships, the color characteristics of the ink channels and the influence weights of the ink channels on the target color, a target colorant combination corresponding to the target color, so that the device outputs the target color based on the target colorant combination, and a color difference between a color represented by the target colorant combination and the target color is less than a color difference threshold. The present application can significantly improve the automation and efficiency of determining the target colorant combination, and realize adaptive adaptation to different process requirements while maintaining color conversion accuracy.
Owner:HANGZHOU HONGHUA DIGITAL TECH
Displaying a virtual object in a real-life scene
In a method for displaying a virtual object (140), a scene (100) is imaged. The scene comprises a target apparatus (120). The target apparatus comprises a set of color target elements (121) having known reflectance properties and at least one illumination target element (122) having a plurality of known surface normals. At least one image of the scene is processed to determine measured colors for the color target elements and illumination and viewing conditions for the scene. Color transformation parameters are calculated by comparing the measured colors and the known reflectance properties of the color target elements. The virtual object is rendered for the determined illumination and viewing conditions. The rendered virtual object is aligned with the scene. A color transformation is applied to the imaged scene and / or to the virtual object, and an overlay of the rendered virtual object with the imaged scene is displayed on a display device (220) in real time while the illumination and / or viewing conditions are changed.
Owner:X RITE EUROPE GMBH