202 results about "Moiré pattern" patented technology

The invention provides a mechanical arm motion precision detection system and method based on moire fringes, and relates to the field of image data processing, and the system comprises a grating projection module which is used for determining grating parameters based on motion information of a mechanical arm and projecting a grating pattern to a detection surface of the mechanical arm based on the grating parameters, the grating parameters at least comprise grating density, grating angle and grating type; the image acquisition module is used for acquiring continuous frames of moire fringe images in the movement process of the mechanical arm; and the data processing module is used for carrying out phase calculation on the continuous frames of moire fringe images and resolving the displacement error, the rotation angle error and the vibration error of the mechanical arm, and the motion detection precision of the mechanical arm is improved.

The invention provides a deformation monitoring system and method based on phase information, and relates to the technical field of engineering surveying, and the system comprises a shooting equipment group which collects a time sequence image of a monitoring area and transmits the time sequence image to a data processing unit, and a plurality of deformation monitoring targets and control targets which are respectively arranged on the surface and the peripheral area of a target deformation body, the data processing unit is used for extracting the center coordinates of the targets according to the time sequence images, correcting the center coordinates of the deformation monitoring targets, correcting the time sequence images after the center coordinates of the deformation monitoring targets are corrected according to the center coordinates of the control targets, and outputting the corrected time sequence images. And calculating the displacement variation of the control target according to the corrected time sequence image through a Moire fringe method, obtaining the correction coordinate of the control target, carrying out fine compensation on the position of the deformation monitoring target in the corrected time sequence image according to the correction coordinate, and determining the deformation monitoring result of the target deformation body. And real-time and high-resolution deformation monitoring is realized.

The invention discloses a moire fringe signal compensation method and system based on an MSPSO optimization VMD algorithm. The method comprises the following steps: establishing a mathematical model of moire fringe signals; parameters of a multi-target particle swarm optimization algorithm MSPSO are set and initialized; obtaining a mathematical model of the optimized moire fringe signal; mapping the position of each particle into a parameter combination of a VMD algorithm; decomposing by using a VMD algorithm to obtain a plurality of intrinsic mode function IMF components; envelope entropy corresponding to the IMF component is calculated, and the minimum envelope entropy is used as a fitness function value; the optimal position corresponding to the minimum envelope entropy is recorded, and population extreme value updating is carried out to update the individual optimal position Pbest and the population optimal position Gbest; judging whether an iteration termination condition is met or not; and outputting a calculation result, performing error compensation on the grating moire fringe signal according to actual parameters obtained by calculation, namely decomposing and reconstructing the moire fringe signal, and outputting the compensated signal. According to the invention, noise compensation is realized; and resource occupation and hardware realization difficulty are reduced.

The invention provides a high-precision alignment method and equipment for laminated iron, and relates to the technical field of laminated iron processing. Wire grid moire fringe marking and concentric circle moire fringe marking are conducted on a substrate and a laminated film, composite marking is achieved, the phase difference of the film is calculated and analyzed by collecting wire grid moire fringe image data, and the alignment precision of the laminated iron is improved. The method comprises the following steps: collecting concentric circle moire fringe image data, fitting a circle center coordinate and a wire grating angle by using Hough transformation to obtain a rotation deviation, and carrying out deviation coupling on the rotation deviation, the transverse deviation and the longitudinal deviation to generate a deviation coupling matrix. The deviation coupling matrix is used for compensating and adjusting the laminating position and compensating errors, high-precision decoupling detection and dynamic correction of translation deviation and rotation deviation are achieved, the transverse, longitudinal and rotation precision is greatly improved, the effective area occupied by the marking size on a base plate is small, and the method is more suitable for production of laminated steel with narrow breadth and high-density typesetting.

The invention discloses an optical film capable of effectively improving moire patterns, a composite brightness enhancement film and a backlight module. The optical film comprises a base material layer and a prism structure layer attached to the surface of one side of the base material layer. The prism structure layer comprises a first protrusion located in the middle and a plurality of second protrusions continuously arranged on the two sides of the first protrusion. Seen from the cross section, the first bulge is an isosceles triangle; the second protrusion is of an M-shaped prism structure and comprises a first bevel edge, a second bevel edge, a third bevel edge and a fourth bevel edge which are sequentially adjacent, the first bevel edge starts from the surface of the base material layer, and the fourth bevel edge ends at the surface of the base material layer. The first bevel edge and the second bevel edge form an included angle to form a first peak, and the third bevel edge and the fourth bevel edge form an included angle to form a second peak; the distance between the first peak and the second peak gradually increases or decreases along with the distance away from the first protrusion. The invention provides a novel anti-interference prism structure which can balance optical performance and is beneficial to improving production efficiency and controlling cost.

The invention relates to the technical field of virtual reality imaging devices, and discloses a moire-based virtual image display device, which comprises an image generation unit and a curved surface reflector, and is characterized in that light emitted by the image generation unit is reflected by the curved surface reflector to form an amplified virtual image; the image generation unit comprises a light source, an imaging unit and a grating which are sequentially arranged in the light propagation direction, the transverse size of an eye box of the virtual image display device is D, and the period of moire patterns formed by the imaging unit and the grating is larger than the eye box area size D by two times. By actively utilizing the moire effect, stray light energy is transferred to an effective visual area, the light utilization rate is improved, and the adverse effect of moire on an image is avoided; meanwhile, an existing peep-proof film is omitted, the material cost is reduced, and the adverse effect on definition caused by moire patterns generated by the peep-proof film and a pixel dual-period structure is avoided.

The embodiment of the invention provides a model training method and a focusing processing method, and relates to the technical field of terminals. The method includes training a focus model using moire-enhanced image data, and applying the model in a focus processing flow. When a user uses a terminal to shoot an electronic screen and moire patterns appear in an image, so that a traditional automatic focusing method is limited, the phase difference can be obtained through model reasoning, or the phase difference can be obtained based on laser ranging. Therefore, according to the obtained phase difference, the horse is adjusted to reach the corresponding position, focusing is achieved, picture focusing jitter in the terminal is avoided, and a user can shoot a clear image.

The invention relates to the technical field of intelligent design of optical lenses, and discloses a multi-series superposed complex periodic structure arrangement method and system.The method comprises the steps of normalized coordinate transformation, multiple sine wave superposition, an iterative function system, a Julia set algorithm, an LSystem grammar system, parameter adjustment, moire fringe fusion and the like; and a complex periodic structure with high complexity, adaptability resistance and natural morphological characteristics is generated. Advanced technologies such as logarithm uniform distribution wave number generation, a chaos game algorithm, linear mapping complex number conversion, a turn graph interpreter, multi-scale entropy complexity quantification and an Otsu automatic threshold method are adopted, and accurate parameterization control and manufacturing adaptation are achieved. The system comprises a coordinate transformation module, a wave interference calculation module, a fractal generation module, a complex power system module, an LSystem processing module, a parameter control module and a contour surface extraction module. According to the invention, a systematic solution can be provided for complex structure design of optical devices such as myopia prevention and control lenses.

The invention provides a screen information anti-leakage method and system, and relates to the field of information security, and the method comprises the steps: calculating and generating a target moire fringe pattern which can strongly interfere with secret photographing equipment based on preset secret photographing equipment parameters and the energy distribution of original information in a transform domain; the Hash value of the original information content and the dynamic safety parameters are subjected to logical operation and then input into a hyperchaotic system, a chaotic phase mask bound with the content and time is generated, amplitude-frequency information and a mask of moire fringes are combined, a preset imaging light path model is subjected to reverse optimization calculation, and a stable and effective anti-divulging disturbance pattern within a preset range is obtained. And carrying out pixel-level superposition on the anti-leakage disturbance pattern and the original information through a multi-scale fusion algorithm, generating a display frame, outputting the display frame to a screen, and updating the disturbance pattern along with the frame or the period to resist the attack of multi-frame average interference elimination.

The invention provides an image moire removing method and system based on wavelet transform, and the method comprises the steps: carrying out the frequency decomposition processing of a to-be-processed image through employing a wavelet transform mode, determining a high-frequency image and a low-frequency image, and enabling the to-be-processed image to have moire; performing texture distortion removal processing on the high-frequency image to determine a high-frequency image without texture distortion, and performing color distortion removal processing on the low-frequency image to determine a low-frequency image without color distortion; and carrying out fusion processing on the high-frequency image without the texture distortion and the low-frequency image without the color distortion by adopting a self-adaptive learnable fusion mechanism, and determining an image without the moire patterns. According to the image fusion method and device, the low-frequency color distortion component and the high-frequency texture distortion component are effectively and thoroughly separated by adopting a wavelet transform mode, and the image fusion process is adaptively adjusted by adopting an adaptive learnable fusion mechanism, so that the image reconstruction error is reduced, and the image quality and accuracy are improved.

A metrology system may receive one or more first images of an overlay target on a sample from a first detector, where the overlay target includes one or more Moiré structures, which may be formed as first-layer features and second-layer features that at least partially overlap and have different pitches. In the first images, the first-layer features and the second-layer features may be unresolved, but a Moiré pitch may be resolved. The system may further receive one or more second images of the overlay target from a second detector, where at least one of the first-layer features or the second-layer features are resolved in the one or more second images. The controller may generate a metrology measurement based on the one or more first images and generate a measurement of a systematic error associated with the metrology measurement based on the one or more second images.

Provided is an optical film requirement that does not use fine particles for light diffusion, is entirely composed of a transparent resin, and has a self-moire pattern that cannot be visually recognized by the naked eye, said optical film requirement having high front brightness without luminance unevenness on the light emission surface of a backlight when mounted on an edge-light backlight. A light-collecting auxiliary film inserted between the light emission surface of a light guide plate and the light incidence surface of a brightness enhancement film (BEF) in an edge-light backlight unit using discrete LED point light sources, the light-collecting auxiliary film being characterized by comprising: an optical waveguide layer comprising a light-transmitting base film, and a light-collecting layer comprising a light-transmitting base film, the light-collecting auxiliary film being interposed between the light emission surface of the light guide plate and the light incidence surface of the brightness enhancement film (BEF), the light-collecting auxiliary film being interposed between the light-emitting surface of the light guide plate and the light incidence surface of the brightness enhancement film (BEF); a light extraction layer that is formed on one surface of the optical waveguide layer and has a plurality of inverted rectangular pyramid-shaped unit recesses; and a light introduction layer formed on the other surface of the optical waveguide layer and having a plurality of unit triangular prisms extending in parallel in one direction, the light extraction layer constituting a light emission surface, and prism surfaces of the plurality of unit triangular prisms constituting the light introduction layer constituting a light incidence surface. The direction of the ridge lines of the plurality of unit recesses and the direction of the ridge lines of the plurality of unit triangular prisms intersect at an angle of 42 DEG to 48 DEG, and the light extraction layer, the optical waveguide layer, and the light introduction layer do not contain fine particles for light diffusion. The self-moire pattern generated by the plurality of unit recesses and the plurality of unit triangular prism lenses cannot be visually recognized by naked eyes.

The present invention discloses an optical film, composite brightness enhancement film, and backlight module that effectively improve moiré patterns. The film comprises a substrate layer and a prismatic structure layer attached to one surface of the substrate layer. The prismatic structure layer includes a first protrusion located in the middle and a plurality of second protrusions arranged continuously on both sides of the first protrusion. In cross-section, the first protrusion is an isosceles triangle. The second protrusion is an "M"-shaped prism structure, comprising first, second, and fourth adjacent hypotenuses, with the first hypotenuse originating from the substrate layer surface and the fourth hypotenuse terminating therefrom. The first and second hypotenuses are arranged at an angle to form a first peak, while the third and fourth hypotenuses are arranged at an angle to form a second peak. The spacing between the first and second peaks gradually increases or decreases as the distance from the first protrusion increases. The present invention provides a novel anti-interference prism structure that balances optical performance, improves production efficiency, and controls costs.

The invention relates to the technical field of optical measurement, in particular to an optical measurement system and a measurement method thereof.The optical measurement system comprises a light source, a projection assembly, an imaging assembly and a receiving assembly, the projection assembly modulates light beams emitted by the light source through an optical mask, generates detection light carrying geometric patterns and projects the detection light to the surface of a sample to be measured; the detection light forms return light comprising reflected light and diffracted light on the surface of the to-be-detected sample, and the diffracted light is formed by diffraction of the detection light through a physical structure on the surface of the to-be-detected sample; the imaging assembly generates signal light carrying moire fringe information and diffracted light information by superposing the return light through a reference pattern structure; the receiving assembly comprises a filtering structure and a receiving module, diffraction light of the signal light is filtered out through the filtering structure to form target signal light, and the receiving module obtains defocus data based on the target signal light. According to the invention, diffracted light in signal light can be effectively filtered out, optical interference is avoided, and the accuracy of automatic focusing is improved.

A personalizable security document including a combination of two secure features, namely, a laser-engravable material embedded in a substrate of the security document and an embossed pattern formed in an outer surface of the substrate and overlapping the laser-engravable material. The combination of the laser-engravable material and the embossed pattern may result in a change in appearance of the embossed pattern when the security document is viewed at different observation angles. Security can be further enhanced by providing a watermark below the laser-engravable material. Further, by providing appropriate structures in the embossed pattern and the laser-engravable material, a personalized security document exhibiting a moiré effect can be obtained.

This utility model discloses an anti-glare glass and an electronic device. The anti-glare glass includes: at least one anti-glare surface; a groove array formed by multiple irregularly arranged grooves on the anti-glare surface; all grooves in the groove array have the same diameter, and the center distance between adjacent grooves is not exactly the same, and adjacent grooves share the same edge; the diameter of the grooves ranges from 15 to 150 μm, and the difference between the maximum and minimum diameter of the grooves is 3 to 70 μm; the depth of the grooves is the same; and the center distance between adjacent grooves is 15 to 120 μm. While possessing high anti-glare performance, it also eliminates flash points, moiré patterns, and rainbow patterns.

The invention provides a light field 3D display moire simulation and suppression method. The method comprises the following steps: establishing a light field 3D display simulation model, simulating moire of a microlens array at different rotation angles, and performing frequency domain analysis to obtain an optimal rotation angle. The moire patterns generated by the micro-lens array at different rotation angles are simulated, and the high-frequency energy ratio of the moire patterns is calculated by using two-dimensional fast Fourier transform, so that the optimal rotation angle for suppressing the moire patterns is accurately obtained, and an effective solution can be provided for developing a high-definition light field 3D display screen without moire patterns.

The invention relates to the field of optical display and material engineering, in particular to an optical film with a 3D light splitting function and a manufacturing method of the optical film. An optical film with a 3D light splitting function comprises a transparent optical base material and a microstructure layer integrally formed with the surface of the transparent optical base material, the microstructure layer comprises a cylindrical lens grating layer and a parallax barrier layer, and the cylindrical lens grating layer is integrally formed on the surface of the transparent optical base material. The cylindrical lens grating layer is of a micro-nano structure formed by a nano-scale grating and a micron-scale cylindrical micro-lens array; the parallax barrier layer is located on the side, away from the transparent optical base material, of the cylindrical lens grating layer. The optical film has excellent optical efficiency, wider visual angle, excellent brightness uniformity and excellent moire inhibition capability, has 2D / 3D switching, peep-proof and other functions, can adapt to light requirements of different scenes, can serve as a core display optical element to be directly integrated in various display devices, and has wide application prospects. And the application limitation of an externally-pasted protective film is broken.

This invention belongs to the field of optical film technology, specifically high-definition optical composite coating films and their preparation methods. This invention aims to solve the problem that existing optical composite films cannot simultaneously achieve both optical enhancement and viewing angle. This invention involves mixing a nano-conductive polymer, a silicone additive, and a diffusion liquid to obtain a diffusion layer coating liquid; dispersing PMMA-PS microspheres in the diffusion layer coating liquid to obtain a composite coating liquid; mixing a prism layer resin and nano-silica to obtain a prism layer coating liquid; coating the back of a PET substrate with the composite coating liquid and passing it through a microlens array to obtain a diffusion layer; coating the front of the substrate with the prism layer coating liquid to obtain a prism layer; and finally, after curing, attaching a PE protective film to one side of the prism layer to obtain the composite coating film product. The composite coating film prepared by this invention has excellent optical enhancement, a good viewing angle, and effectively suppresses moiré patterns.

The present invention discloses a method, device and storage medium for extracting an effective area of moiré fringes. The method comprises the following steps: obtaining a straight fringe image and a deflected fringe image of exactly the same size and position; converting the straight fringe image and the deflected fringe image into grayscale images, and performing binarization processing on the two grayscale images to obtain two binarized images; subtracting the values of corresponding pixel points of the two binarized images and taking the absolute values to obtain a processed image D; projecting the processed image D onto the horizontal axis and the vertical axis respectively, finding the starting and ending positions of the fringe deflection and the coordinates of a circumscribed rectangle of the image; obtaining the side length of the effective area by averaging the fringe deflection length and the side length of the circumscribed rectangle; placing the fringe deflection at the center according to the side length of the effective area, and finally extracting the effective area of the fringe image. The present invention realizes intelligent and precise extraction of the effective area of moiré fringes and has better universality.

The present invention discloses a display panel and display device. By ensuring that the orthographic projections of each effective light-emitting area on a substrate overlap with the orthographic projections of signal traces on the substrate, and that the first overlapping region is non-linear, light emitted from the effective light-emitting area can form optical interference through the signal traces in the first overlapping region. Consequently, when the display panel is used in a 3D display device, moiré patterns can be reduced, enhancing the display quality.

The invention discloses an ultra-high-definition image moire removal method based on cross-band adaptive fusion and a terminal, which are applied to camera equipment in a camera shooting screen scene, and the method comprises the following steps: obtaining paired ultra-high-definition images polluted by moire and a moire-free ultra-high-definition image data set in different scenes; randomly dividing the data set into a training set and a test set, and preprocessing an ultra-high-definition image polluted by moire and an ultra-high-definition image without moire; training an ultra-high-definition image moire removal model based on cross-band adaptive fusion through the training set data to obtain a trained ultra-high-definition image moire removal model based on cross-band adaptive fusion; and inputting test set data into the trained ultra-high-definition image moire removal model based on the cross-band adaptive fusion to obtain an ultra-high-definition image after moire removal. According to the method, the complex moire patterns in the ultra-high-definition image can be effectively modeled, so that the clear image is recovered.

This application discloses a display panel and a display device for mitigating moiré patterns. The display panel includes: a display substrate and a touch conductive layer; the display substrate includes: a plurality of sub-pixel groups; the sub-pixel groups include: a plurality of sub-pixel opening regions arranged along a first direction, and non-opening regions; the touch conductive layer includes: a plurality of touch electrodes; the touch electrodes include: a plurality of hollowed-out regions arranged in an array, and non-hollowed-out regions located between the hollowed-out regions; the orthographic projections of the hollowed-out regions and the non-hollowed-out regions on the display substrate overlap with the sub-pixel groups; the hollowed-out regions include strip-shaped hollowed-out regions; the maximum width of the same sub-pixel opening regions located in different sub-pixel groups is not completely the same in the first direction, and / or, for regions corresponding to different sub-pixel groups, at least one of the following is not completely the same: the width of the hollowed-out region in the first direction, the width of the non-hollowed-out region between two adjacent hollowed-out regions in the first direction, and the angle between the extension direction of the strip-shaped hollowed-out region and the first direction.

A metrology system may receive one or more first images of an overlay target on a sample from a first detector, where the overlay target includes one or more Moire structures, which may be formed as first-layer features and second-layer features that at least partially overlap and have different pitches. In the first images, the first-layer features and the second-layer features may be unresolved, but a Moire pitch may be resolved. The system may further receive one or more second images of the overlay target from a second detector, where at least one of the first-layer features or the second-layer features are resolved in the one or more second images. The controller may generate a metrology measurement based on the one or more first images and generate a measurement of a systematic error associated with the metrology measurement based on the one or more second images.

A mask manufacturing method, an anti-glare mask, and a manufacturing method for an anti-glare product. The mask manufacturing method comprises: generating a base scatter plot having random characteristics; on the basis of the base scatter plot, drawing a Voronoi diagram; and clipping a pattern from the Voronoi diagram, and performing two instances of mirroring, edge trimming and arraying on the pattern, in order to obtain an anti-glare mask. The anti-glare mask is manufactured using the mask manufacturing method. The manufacturing method for an anti-glare product comprises steps such as coating, exposure, development, etching, and stripping. A base scatter plot having random characteristics is used to draw a Voronoi diagram, and steps such as pattern clipping, mirroring, edge trimming and arraying are then performed, such that an ultimately obtained anti-glare mask has an anti-glare effect. The manufacturing method avoids optical defects such as Moire patterns and reflected bright lines, so that the mask manufacturing precision is improved, and patterns on masks are also more uniform and delicate, thereby improving the quality and performance of the masks.

The invention provides a non-equal pitch angle grating coded disc and an absolute photoelectric shaft angle encoder. The non-equal pitch angle grating coded disc comprises a main grating with an equal pitch angle and a slit grating with a non-equal pitch angle. The slit grating is provided with a split-phase window, and the split-phase window comprises m reference grating lines and m gradient precise code grating lines arranged on the two sides of the reference grating lines. The reference grating grid lines are arranged at the positions of the middle bisectors of the Minger fringes which are spaced by each other when the Minger fringes are generated by the equal pitch angles; starting from the first reference grating grid line, the positions of the gradient fine code grating grid lines on the two sides of the reference grating grid line are sequentially adjusted, so that the grid lines, generating dark moire fringes, on the two adjacent sides of the reference grating grid line are progressively increased from the included angle of 0 degree in an arithmetic progression, and n times of gradient change is carried out to reach the target pitch angle. By designing the fine code arrangement mode of the slit grating, the photoelectric signals extracted from the generated moire fringes are closer to theoretical sine.

A display device (300) and a manufacturing method therefor, and an electronic product. In the display device (300), a display panel (100) comprises: a plurality of pixel units (110) arranged in an array, wherein the plurality of pixel units (110) are divided into a plurality of pixel islands (120) arranged in an array in a third direction (D3) and a second direction (D2), each pixel island (120) comprises M pixel unit rows (131), and each pixel unit row (131) comprises N pixel units (110) arranged in the third direction (D3). A light-splitting assembly (200) comprises a plurality of light-splitting units (210), wherein each light-splitting unit (210) comprises P light-splitting structures (220), each light-splitting structure (220) extends in the third direction (D3), the size of each light-splitting unit (210) in the second direction (D2) is equal to the width of each pixel island (120) in the second direction (D2), and the orthographic projection of each light-splitting unit (210) on the display panel (100) covers Q pixel islands (120). In each pixel island (120), a connecting line of luminance centers of the N pixel units (110) comprised in each pixel unit row (131) also extends in the third direction (D3), and a first included angle between the third direction (D3) and the second direction (D2) is greater than 0 degrees and less than 90 degrees. The display device (300) can prevent moiré patterns.

A camera located behind a partially transparent display allows for a participant in a video conference to appear to be looking directly at other participants, creating a natural eye-to-eye setting similar to an in-person meeting. However, the camera picks up moiré patterns and other distortion from the display. A machine learning model is trained to predict the interference from a frame of video on the display. The predicted interference is then subtracted from a corresponding video frame from the camera, resulting in a clean image. The clean image is then used in place of the camera's video frame in output video, resulting in high quality video useful for a video conference.

The present disclosure provides a display device, for use in eliminating moiré patterns. The display device comprises: a display panel, comprising: pixel repeating units, each pixel repeating unit comprising a plurality of pixel islands, each pixel island comprising a plurality of sub-pixels, and the plurality of pixel repeating units comprising a plurality of pixel repeating unit rows; and a light splitting assembly, comprising a plurality of light splitting repeating units extending in the column direction and continuously arranged in the row direction, the light splitting repeating units comprising M light splitting structures extending in the column direction and continuously arranged in the row direction, each light splitting repeating unit corresponding to N columns of sub-pixels in the pixel repeating unit rows, M and N being both integers greater than 1, the light splitting structures having convergence center lines extending in the column direction, and the distance between the convergence center lines of two adjacent light splitting structures being a first distance. At least some of the sub-pixels in two adjacent pixel repeating unit rows are arranged in a staggered manner in the row direction, and / or at least some of a plurality of first distances corresponding to the M light splitting structures are not equal.