224 results about "White point" patented technology

The invention relates to a color calibration method and system based on a display driving chip, and the method comprises the following steps: carrying out the sub-pixel spectrum reconstruction of an original spectrum data stream based on a color gamut boundary vector group, and obtaining a sub-pixel spectrum matrix; performing white point chromaticity estimation on the sub-pixel spectrum matrix to obtain white point chromaticity coordinates; performing gamma curve correction on the sub-pixel spectrum matrix based on the white point chromaticity coordinates to obtain a gamma correction coefficient matrix; performing color space conversion on the gamma correction coefficient matrix through a preset three-dimensional lookup table to obtain color control parameters, and inputting the color control parameters into a preset display driving chip to drive sub-pixels of each pixel unit in the display panel to emit light to obtain color calibration display output, the defects of a traditional display driving chip in the aspect of color calibration are overcome, and the defects are mainly embodied in the technical problems that color differences between different display panels cannot be effectively processed and the color drift phenomenon occurs along with time lapse.

The invention discloses an endoscope multi-region semantic perception time domain fusion adaptive white balance algorithm. The algorithm comprises the following steps: acquiring an endoscope image; performing tissue region division on the endoscope image through a lightweight semantic segmentation network to obtain a plurality of region images; converting each regional image from an RGB space to a YCbCr color space, separating a brightness channel Y from chrominance channels Cb and Cr, and calculating a channel mean value of the chrominance channels Cb and Cr; calculating the average offset of the chrominance channels Cb and Cr according to the calculated channel average of the chrominance channels Cb and Cr; performing white point detection on each regional image to obtain an RGB three-channel mean value; combining the calculated mean offset of the chromaticity channels Cb and Cr, the RGB three-channel mean obtained by white point detection of each regional image and a statistical index to form a multi-dimensional regional color feature vector; and fusing historical frame features with the regional color feature vector to obtain a feature vector based on space-time fusion.

The invention provides a display control method and system for a liquid crystal display screen, and the method comprises the steps: carrying out the nonlinear spectrum mapping processing of an input RGB drive value, and obtaining a theoretical emission spectrum through combining with the response characteristics of liquid crystal molecules; calculating a reflection spectrum component in the multilayer structure according to the ambient light spectrum, and superposing the reflection spectrum component with the theoretical emission spectrum to obtain an actual observation spectrum; calculating a difference value between the actual observation spectrum and the target spectrum, and converting the difference value into an RGB correction value through a constraint optimization algorithm to obtain an RGB driving value after ambient light compensation; and calculating actual white point color coordinates, and adjusting the actual white point color coordinates to a standard white point position through a progressive white point migration algorithm. Display parameters can be dynamically adjusted according to real-time ambient light conditions, the influence of ambient light reflection on colors is effectively compensated, meanwhile, color temperature consistency and color accuracy are ensured through white point correction, the display quality under different ambient lights is remarkably improved, and the visual experience of a user is improved.

The present technique relates to an imaging device and an electronic device that can further suppress the occurrence of white spots and dark current.The imaging device includes: a photoelectric conversion region including a first semiconductor region containing a first impurity and a second semiconductor region containing a second impurity; and a layer region including at least a first layer containing a high concentration of the first impurity and a second layer made of a predetermined material on a light incident surface side of the photoelectric conversion region. The imaging device further includes a pixel array part including the photoelectric conversion region disposed therein in an array form; and a pixel peripheral part including a processing unit that is disposed therein and processes a signal from the pixel array part. The pixel peripheral part is provided with a layer region not including the first layer. The present technique is applicable to, for example, an imaging device such as an image sensor.

A head-mounted device may have an inner display that displays images for a user and an outer display that informs nearby people of the status of the user and inner display. For example, the outer display may display an image of a face, an abstract layer, or both, depending on whether the inner display is operating in passthrough mode, mixed reality mode, or virtual reality mode. An ambient light sensor in the head-mounted device may be used to measure the brightness and color of ambient light. The white point of the face layer on the outer display may be adapted to the color of ambient light, whereas the white point of the abstract layer on the outer display may remain fixed. The white point of a display may be a correlated color temperature setting (e.g., measured in degrees Kelvin) that determines the warmth or coolness of displayed colors.

The invention discloses a liquid crystal display device, an image display method, electronic equipment and a readable storage medium. In a first working mode, a control circuit of the device receives display data of an mth frame of image, and controls the device to display n sub-field images to obtain the mth frame of image; the display data comprises initial gray scales under n primary colors; in one sub-field image of the mth frame of image, pixels comprise a target pixel, and the actual gray scale of the target pixel is an average value of the middle gray scale and the initial gray scales of T non-target pixels; the actual gray scale of at least part of non-target pixels is the initial gray scale; the target pixel at least meets one of a first condition and a second condition; the first condition is that the distance between a target point reflecting the color of the target pixel in the reference color space and a white point is smaller than a distance threshold value; the second condition is that the reference brightness of the target pixel is greater than a brightness threshold; and / or the contrast ratio of the target pixel is greater than a contrast ratio threshold value.

The invention relates to a 3D LUT color space correction method and system, a terminal and a storage medium. The method comprises the following steps: realizing EOTF correction and white point correction of a display based on a post-stage 1D LUT; checking whether the 1DLUT takes effect or not, if so, entering the next step, and otherwise, prompting; color correction of the display is realized based on the 3D LUT of the preceding stage; by adopting the mode and method provided by the invention, the advantages of the 1D LUT and the 3DLUT are integrated, the 3D LUT is adopted for accurate color correction in the preceding stage, and the 1D LUT is adopted for processing the EOTF curve in the later stage, so that the accuracy of color correction is ensured, the smooth EOTF curve can be obtained, and the problems encountered in the current industry are solved.

The invention relates to the technical field of lens module detection, in particular to lens module EOL detection equipment and method, and the equipment comprises a four-station turntable mechanism which is provided with a plurality of bearing test seats for placing lens modules after code scanning; and a plurality of functional modules arranged around the four-station turntable mechanism, wherein the functional modules comprise a surface light test module for optical test, a white field detection assembly, a collimator test module and a black field test assembly. By integrating a multi-station automatic detection process, multiple performance detections such as electrical test, definition, color, signal-to-noise ratio, FOV angle of view, COD decentration, white balance, dark corner, stain and black field of the lens module can be synchronously completed, the coverage of detection items is comprehensive, and compared with traditional equipment only performing white field or black field detection, the full-automatic lens module detection equipment has the advantages that the full-automatic lens module detection equipment is simple in structure and convenient to operate.

The invention discloses a one-kiln two-line production process for energy-saving glass, and relates to the technical field of energy-saving glass plate production. A shunting pressure stabilizing chamber, a central partition wall and an electromagnetic-platinum combined stirring device are arranged at the tail end of a melting furnace, and are matched with prolonging of clarification residence time and a microbubble bubbling device, so that a highly uniform temperature field and component distribution can be obtained before molten glass enters a feeding channel, and bubbles and inclusions are fully eliminated. By means of the collaborative measure, the melt cleanliness is remarkably improved, optical defects such as stripes, stones and white points in the subsequent forming process are greatly reduced, and the appearance and the physical strength of a finished product are more reliable. By means of the Y-shaped double feeding channels and the independent temperature control tin bath, ultra-thin glass and medium-thickness glass can be produced at the same time in the same melting furnace and do not interfere with each other. The main line focuses on the flatness and the optical quality of the energy-saving glass of the building curtain wall, and the branch line focuses on the thickness control and the surface smoothness of the ultrathin energy-saving glass.

Machine vision markers and systems and methods for using and manufacturing machine vision markers are provided. The marker includes a first black target element comprising a black square; a square encoding stripe that extends around a perimeter of and encloses the black square and that is composed of a plurality of square encoding elements collectively encoding a binary data bit sequence encoding identification information about the target object, wherein each respective one of the plurality of square encoding elements is either a black square or a white square representing a data bit of 0 or 1 in the binary data bit sequence, respectively; a white target element comprising a white square ring that extends around a perimeter of and encloses the square encoding stripe; a second black target element comprising a black square ring that extends around a perimeter of the white square ring; and an out of plane white dot post disposed above or below a plane of the marker and positioned centrally on the marker.

The invention discloses an image processing method and device and a storage medium, and belongs to the technical field of shooting. The method is applied to the electronic equipment comprising a plurality of cameras, the plurality of cameras comprise a reference camera, and the method comprises the following steps: under the condition that a first camera is called for shooting, determining a first white point of a current frame shot by the first camera and a first environment color temperature of a shooting environment corresponding to the current frame; according to an environment color temperature difference between the first environment color temperature and a second environment color temperature of a shooting environment corresponding to a memory frame of a reference camera, carrying out fusion processing on white point information of the first white point and white point information of a second white point of the memory frame to obtain white point information of a third white point; and performing white balance correction on the current frame according to the white point information of the third white point. Therefore, the color difference of the images shot by other cameras and the reference camera in the same scene and the visual difference caused by the color difference can be reduced, and the color consistency of multi-camera shooting in the same scene is improved.

The invention provides a large yellow croaker body surface white spot disease image acquisition device based on a YOLOv5 algorithm. The large yellow croaker body surface white spot disease image acquisition device comprises a flow velocity simulation water tank (1); the flow velocity simulation water tank comprises a large yellow croaker image acquisition area (5), a flow velocity control area (25) and a water environment control area (13); an image data acquisition system is arranged at the large yellow croaker image acquisition area and comprises a plurality of cameras connected with a computer; the flow velocity simulation water tank firstly limits the swimming action of the detected pseudosciaena crocea to enable the action of the pseudosciaena crocea to be matched with the working parameters of the image data acquisition system, and then the image data acquisition system acquires the body surface image of the pseudosciaena crocea, analyzes the image based on a YOLOv5 algorithm, or trains the YOLOv5 algorithm by the acquired image; according to the invention, a large amount of independent, multi-angle and clear image data of the sick pseudosciaena crocea can be acquired, and the image data of the sick pseudosciaena crocea under the conditions of different turbidity, different illumination intensities and group movement in a culture environment can be simulated, so that the training effect of the YOLOv5 algorithm is more remarkable.

Systems and methods for a multi-primary color system for display. A multi-primary color system increases the number of primary colors available in a color system and color system equipment. Increasing the number of primary colors reduces metameric errors from viewer to viewer. One embodiment of the multi-primary color system includes Red, Green, Blue, Cyan, Yellow, and Magenta primaries. The systems of the present invention maintain compatibility with existing color systems and equipment and provide systems for backwards compatibility with older color systems.

Disclosed are dynamic system optical-to-optical transfer functions (OOTF), which adapt displayed content to provide a so-called "perceptual reference" effect for the viewer, wherein, as the current viewing conditions depart from a "reference" viewing scenario, the dynamic system OOTF adapts the content and / or display to provide the viewer with as close as possible to the perceptual effect of the "reference" viewing scenario. The dynamic system OOTF may perform one or more of the following adaptation processes: adapting media content from a source color space to a linear XYZ color space; adapting media content from a linear XYZ color space to a display device's color space; automatically adjusting display device brightness, white point, and / or black point; adapting media content from an intended viewing environment to a common compositing space's fixed viewing environment; and / or adapting media content from the common compositing space's fixed viewing environment to that of the viewer's current viewing conditions.

This invention provides a testing device for cameras. Its aging mechanism includes a first aging machine, a second aging machine, and a first conveying component; its airtightness mechanism includes a first airtightness testing platform, a second conveying component, and a first robotic arm; its testing mechanism includes a first testing machine and a second testing machine; its camera mechanism includes a first camera testing machine, a second camera testing machine, and a third camera testing machine; and its unloading mechanism includes a machine base, a second robotic arm, a first lifting component, and a second lifting component. This camera testing device uses the first and second aging machines to perform aging tests on the cameras, the airtightness mechanism to perform airtightness tests, the testing mechanism to correct imaging distortion, the camera mechanism to test black-and-white points, parallel light, and image quality, and finally, the unloading mechanism unloads the cameras. This eliminates the need to distribute the cameras across multiple independent devices for testing, reducing manual operation and increasing the efficiency of camera testing.

Disclosed are dynamic system optical-to-optical transfer functions (OOTF), which adapt displayed content to provide a so-called "perceptual reference" effect for the viewer, wherein, as the current viewing conditions depart from a "reference" viewing environment, the dynamic system OOTF adapts the content and / or display to provide the viewer with as close as possible to the perceptual effect of the reference viewing environment. The dynamic system OOTF may perform one or more of the following adaptation processes: adapting media content from a source color space to a linear XYZ color space; adapting media content from a linear XYZ color space to a display device's color space; automatically adjusting display device brightness, white point, and / or black point; adapting media content from an intended viewing environment to a common compositing space's fixed viewing environment; and / or adapting media content from the common compositing space's fixed viewing environment to that of the viewer's current viewing environment.

The invention relates to a carbon fiber cloth surface defect detection device based on artificial intelligence. The technical problem of how to improve the accuracy and speed of carbon fiber cloth surface defect detection is solved. The carbon fiber cloth surface defect detection device comprises a CIS line-scan digital camera, an image acquisition card and a controller, the CIS line-scan digital camera is arranged above carbon fiber cloth, the image acquisition card is electrically connected with the controller, the CIS line-scan digital camera is electrically connected with the image acquisition card, and the carbon fiber cloth surface defect detection device is configured to detect white point defects and judge white points according to gray values of images acquired by the CIS line-scan digital camera. The method is widely applied to a carbon fiber cloth production process.

This application provides an isolation structure and its manufacturing method. The isolation structure includes a substrate, an isolation trench, a flexible dielectric layer, and a filling layer located within the substrate. The flexible dielectric layer is made of hydroxyl-para-xylene. The filling layer covers the surface of the flexible dielectric layer and fills the isolation trench. This flexible dielectric layer can reduce cracks caused by excessive stress in subsequent thermal processes and can adapt to spatial distortion caused by the expansion of residual gas in the isolation trench through deformation under thermal conditions, reducing damage to the substrate, enhancing the electron coupling ability of the HiK material, improving the yield of devices on the substrate, and reducing dark current in devices and white spots in display images from the source. In addition, this flexible dielectric layer does not contain metal, so it will not cause metal ion contamination to the substrate. It eliminates the need for an additional isolation layer, improving the performance of devices on the substrate while simplifying device structure and processes and reducing manufacturing costs.

The invention discloses a machine-readable card image recognition method based on YOLOv7 model positioning and multi-clustering recognition, which comprises the following steps of: firstly, recognizing a user-defined mark through a YOLOv7 model, determining four corners of a quadrilateral of a selection question region, then extracting an image of a machine-readable card part according to the four corners, then firstly performing trapezoidal correction on the machine-readable card image, and finally performing multi-clustering recognition on the machine-readable card image. Performing denoising, closed operation and graying preprocessing on the image of the region, converting the original image of the machine-readable card to be identified into a black and white binary image, searching rectangles of various scales by adopting the contour in the CV2, then determining each rectangle according to a clustering method, finding out a central point on an X axis and a Y axis, and finally, obtaining the original image of the machine-readable card. And according to the rectangular area ratio of the white points, determining whether filling is carried out, determining a filling position, obtaining an answer, and carrying out comparison. According to the method, verification of multiple examples is carried out, experiments prove that the method is high in automation degree, accurate in recognition and high in speed, the test paper cost is greatly reduced, the paper marking efficiency is improved, and the method has wide popularization value.

The invention relates to an LCM (liquid crystal module) product burning white balance brightness decay reduction burning process method, which controls brightness decay in the burning process through burning process improvement so as to ensure the product display effect. In large-scale production, the display effect of each device can be ensured to be as close as possible and the difference between batches can be reduced by burning the white balance parameters, and by using the process provided by the invention, the reduction of the product brightness in the white balance adjustment process can be reduced and the display effect can be optimized. The burning process is improved, so that in the burning process, brightness attenuation is controlled, the product display effect is guaranteed, badness caused by burning is controlled, production loss is reduced, and the production cost is reduced. After burning according to the process, the adjusted white point coordinates are relatively divergent, the adjusting range of the white point Y coordinates is small, the brightness attenuation can be controlled, and the brightness is made to meet the requirement specification.

The application provides an automatic white balance method based on white point detection and weight fusion, comprising the following steps: S1, calibrating color temperature Planck curve: S1.1, segmenting an image to obtain image parameters; S1.2, calculating Rgain and Bgain block by block; S2, judging whether each block is a white point; if it is a non-white point, the non-white point block is removed; if it is a white point, step S5 is performed; S3, calculating the color temperature of each white point and giving a corresponding weight; S4, clustering to find locally optimal Rgain and Bgain according to the weight and the falling point; S5, iteratively finding the globally optimal awb gain value in a gradient descent manner. Through the globally optimal solution, the awb gain values calculated from the front and rear image frames of the video stream converge and remain consistent, color jumping between the front and rear frames of the video stream is not easy to occur, and the stability of the video image is better maintained.

The invention discloses a display panel and a display device, the display panel comprises a substrate, a pixel definition layer, a light emitting unit, a compensation light emitting structure and an excitation layer, the light emitting unit is arranged on the substrate and is arranged in an opening area; the compensation light-emitting structures are arranged on the pixel definition layer and extend from a non-opening area to the opening area, and each compensation light-emitting structure is arranged around one light-emitting unit; the excitation layer is arranged under the compensation light-emitting structure and used for emitting ultraviolet light to the compensation light-emitting structure, and the compensation light-emitting structure emits visible light under excitation of the ultraviolet light; wherein the compensation light-emitting structure is made of a lanthanide series metal organic framework material. Light compensation is carried out on the light-emitting unit through the compensation light-emitting structure, the coordinates of the white points are adjusted, the offset color points are recovered, and therefore color cast caused by color point offset of the light-emitting unit is improved.

The utility model relates to a narrow-frame shockproof display screen which solves the problem that an existing display screen is prone to generating scratches and poor white points in a micro-drop test. Comprising a rubber frame, a backlight module, a display module, an LED lamp panel and a back frame, the backlight module comprises a backlight film material and a light guide plate, the light guide plate is located in the back frame, the backlight film material is located on the light guide plate, the LED lamp panel is located on the side face of the light guide plate, the rubber frame is of an annular structure with a notch, and the back frame is provided with an inverted-U-shaped bending structure corresponding to the notch. A backlight module installation groove is formed by the inner side face of the rubber frame and the back frame, the backlight module is located in the backlight module installation groove, the LED lamp panel is located in an inverted-U-shaped bent structure, bosses are arranged on the two sides of the end, close to the LED lamp panel, of the inner side of the rubber frame, inclined faces are arranged at the ends, away from the LED lamp panel, of the bosses, and the distance between the bosses and the light guide plate ranges from 0.13 mm to 0.18 mm. The vibration amplitude of the light guide plate in the micro-drop test is reduced, so that friction between backlight materials is kept, and scratches or poor white points occurring in the micro-drop test of products are reduced.

The application discloses a light source color resolution evaluation method, device and equipment and a storage medium, and relates to the technical field of light source quality testing. The spectral power distribution of a test light source is acquired under multiple exit angles, and the bidirectional reflectance factor of a test color sample is combined to calculate three stimulus values and white point three stimulus values. The hue angle, brightness value and saturation value of each test color sample under the exit angle are calculated according to the three stimulus values and the white point three stimulus values. The comprehensive color error value of the test light source relative to a reference light source under the exit angle is obtained according to the aforementioned three parameters. The color resolution index of the test light source is obtained according to the neutral density index of the test light source and the comprehensive color error value corresponding to each exit angle. The spectral power distribution is collected under multiple exit angles, the color rendering performance of the light source in the front is considered, and the spectral output difference under different angles is also considered, so that the color rendering consistency and the directional characteristics of the light source in the spatial distribution can be comprehensively reflected.

This application provides an image processing method, electronic device, and storage medium, relating to the field of image processing. The method includes: launching a camera application in response to a first operation; displaying a first interface, the first interface including a preview area; determining the shooting scene corresponding to the image to be processed; determining a high-confidence white point corresponding to the image to be processed based on the shooting scene, the high-confidence white point being used to characterize the true light source color of the shooting environment corresponding to the image to be processed; performing white balance processing on the image to be processed using the high-confidence white point to obtain a preview image, and displaying the preview image in the preview area. This method can determine the high-confidence white point corresponding to the image to be processed under different shooting scenes, and perform white balance processing on the image to be processed based on the high-confidence white point, which can effectively improve the white balance effect, enabling the preview image obtained after white balance processing to accurately restore the true colors of the image, and significantly improving the overall image quality.

To provide a reverse-type light control film and transparent conductive film, which offer reduced white spots and superior appearance quality.SOLUTION: A light control film according to an embodiment comprises a pair of transparent base materials, alignment layers provided on inner sides of the transparent base materials, and a light control layer with liquid crystal molecules provided on the inner sides of the alignment layers, where surfaces of transparent electrode layers facing the alignment layers have an arithmetic average roughness Sa of 2.5 nm or less.SELECTED DRAWING: Figure 1

Provided are a display panel and a display device. In the display panel, first sub-pixels are configured to emit light of a first color, second sub-pixels are configured to emit light of a second color, and third sub-pixels are configured to emit light of a third color. The first sub-pixels, the second sub-pixels, and the third sub-pixels at least satisfy one of the following relationships: relationship I: the difference between the color gamut x-coordinate of the light of the second color and the color gamut x-coordinate of the light of the third color is within the range of ±0.02 of the color gamut y-coordinate of the light of the third color, and the color gamut y-coordinate of the light of the first color is not greater than the color gamut x-coordinate and / or the color gamut y-coordinate of a white point formed by synthesizing the light of the first color, the light of the second color, and the light of the third color; and relationship II: the difference between the maximum value and the minimum value of the half-peak widths of the electroluminescence spectra of the first sub-pixels, the second sub-pixels, and the third sub-pixels is less than or equal to 11 nm, and the difference between the half-peak widths of the electroluminescence spectrum and photoluminescence spectrum of each sub-pixel is less than or equal to 16 nm.

Embodiments of the disclosed subject matter provide a device having a full-color organic light emitting device (OLED) display having a plurality of pixels, with each pixel having a plurality of sub-pixels and where no individual sub-pixel of the plurality of sub-pixels emits white light. The OLED display may be configured to operate with a luminance of at least 1,000 cd / m2 at the D65 or higher white point, and using not more than a 0.5 mA / cm2 drive current for a blue sub-pixel of the plurality of sub-pixels based on an overall active area of the full-color OLED display.

This application discloses a color adaptation method and an electronic device. The electronic device has a shooting end and a display end. At the shooting end, the electronic device can capture a first original image under a first ambient color temperature, and generate and save a first image file based on the first original image. The first image file includes a first image and first metadata, which includes the first ambient color temperature, the expected white point color temperature of the first image when displayed under the first ambient color temperature, and the white point color temperature of the first image in the first image file. At the display end, the electronic device can generate and display a color-adapted first image based on a second ambient color temperature. The white point color temperature of the color-adapted first image is determined based on the aforementioned first metadata. Therefore, the electronic device can restore the image to the color temperature perceived by the human eye after color adaptation to the greatest extent possible, thereby providing users with a more realistic shooting and viewing experience.

This invention discloses an image sensor and its fabrication method, belonging to the field of semiconductor technology. The image sensor includes at least: a substrate with a first isolation structure and a second isolation structure spaced apart within it; a photodiode, spaced apart from the first isolation structure and disposed within the substrate; a transmission gate, disposed on the substrate away from the photodiode and the first isolation structure; a floating diffusion region disposed within the substrate between the transmission gate and the second isolation structure, wherein the height of the side of the second isolation structure closest to the floating diffusion region is lower than the substrate surface, and a groove is formed therein; a source follower gate, spaced apart from the transmission gate and partially covering the second isolation structure; and a sidewall structure disposed around the transmission gate and the source follower gate, wherein the distance between the side edge of the transmission gate and the edge of the floating diffusion region is greater than the distance between the side edge of the transmission gate and the edge of the sidewall structure. The image sensor and its fabrication method provided by this invention can reduce white spot phenomena and dark current during imaging.