394 results about "Chromatic aberration" patented technology

The invention discloses a ceramic substrate surface defect intelligent identification method and system based on multispectral imaging, and the method comprises the following steps: synchronously collecting multispectral images under a plurality of visible light and near-infrared wavebands, constructing a multispectral image stack, and completing dark field deduction, registration and geometric correction processing; inputting the crack sensitive wave band combination image into a CrackFormer crack identification network, extracting slender structure characteristics and positioning a crack area; inputting the edge enhancement graph into an improved BDCN edge detection network, extracting the contour structure of the ceramic substrate, and identifying the position of a contour gap; a chromatic aberration defect area is extracted through brightness difference calculation; and fusing the identification results of the three types of defects, and outputting a defect mask pattern and structured defect information. According to the method, the multi-band image and the deep learning model are fused, and the accuracy and adaptability of ceramic substrate defect detection are improved.

The invention discloses a multivariate data fusion coal bunker abnormal state monitoring method and system, and the method comprises the steps: collecting the continuous N-frame image information of a coal piling detection region in an image, obtaining the static pixel area of the coal piling region, calculating the ratio of the static pixel area of the coal piling region to the total area of the whole region, and calculating the area of the coal piling region; if the proportion in the continuous N frames of images exceeds a set threshold value, it is judged that coal piling abnormity occurs; image information of a coal falling opening in the image is collected, and whether coal blockage abnormity occurs or not is judged in combination with a coal level meter signal and the running state of the coal feeder; the method comprises the following steps: acquiring continuous N frames of image information of a lower opening and a coal falling opening of a coal bunker in an image, presetting a bunker collapse detection area in the image, calculating a chromatic aberration diffusion rate and a coal level descending rate in the bunker collapse detection area, and judging that bunker collapse is abnormal if the chromatic aberration diffusion rate and the coal level descending rate in the continuous N frames of image continuously exceed corresponding threshold values. Under the condition that existing equipment does not need to be transformed and replaced, recognition of various states of the coal bunker is achieved at low cost.

The invention relates to the technical field of industrial automation and machine vision, and particularly discloses a baked porcelain plate surface defect online detecting and sorting system based on machine vision. The system comprises an automatic feeding module, a multi-modal image acquisition module, a central data processing module and an intelligent execution sorting module which are arranged in sequence, synchronously acquiring surface information by adopting three imaging units of a bright field, a dark field and a 3D outline; constructing a multi-modal feature fusion defect classification model based on deep learning, and realizing feature fusion through a cross attention mechanism; the integrated model online learning unit is used for realizing incremental learning by adopting an elastic weight consolidation algorithm; the intelligent execution sorting module plans a track according to the defect position and performs sorting through a self-adaptive vacuum chuck array; the device realizes comprehensive detection of various defects such as scratches, pits and chromatic aberration, has the beneficial effects of high detection precision, strong self-adaption, avoidance of secondary damage and the like, and improves the production efficiency and the product quality.

The invention discloses a brightness and chrominance consistency correction method and system for an LED spliced screen, and the method comprises the steps: firstly recognizing the batch features of a module, dividing the batch features into correction partitions, and respectively collecting the original brightness and chrominance data of a high-gray linear region and a low-gray nonlinear region; and then, calculating the geometric intersection of the original color gamuts of all the partitions to determine the maximum common target color gamut, and eliminating the metamerism phenomenon caused by multi-batch mixed use from the physical level. Then, constructing a non-linear dual-order correction model, and generating a correction coefficient set containing a main linear conversion matrix and a low-gray-scale non-linear offset item; when the control system runs, the linear matrix is dynamically called according to the input gray level, and bias compensation is superposed. According to the invention, the problems of cross-batch visual angle chromatic aberration and color temperature drift and pocking marks under low gray level of the spliced screen are effectively solved, and the high-fidelity display consistency of the full gray level is realized.

In a method for reading identification information inscribed in a wafer (14) in the form of an identification mark (16), at least one measuring beam (24; ML) of an optical measuring device (20; 110), comprising either an optical coherence tomograph (22) or a chromatic confocal distance sensor (110), scans an area (18) of the wafer (14) in which the identification mark (16) is inscribed. The identification mark (16) is recognized from measurement data generated from the scanning of the wafer (14). Based on the recognized identification mark (16), the identification information associated with it is determined.

The invention is suitable for the technical field of diffractive optics, and provides a self-adaptive chromatography grating dispersion correction method and system based on deep learning, and the method comprises the following steps: enabling an incident light beam to be diffracted through a chromatography grating, and obtaining a multi-stage chromatography diffraction light beam; dispersion angle compensation is carried out on the multi-stage diffraction beams through the plane straight stripe blazed grating; collimating the corrected light beam by using a double-barrel lens group and forming an image space telecentric light path to obtain an image space telecentric light beam; performing spectral beam splitting and aberration pre-correction on an image space telecentric beam through a micro-lens array, and then performing image acquisition to obtain a pre-corrected multi-spectral image; and based on a deep learning algorithm, carrying out real-time fusion processing on the pre-corrected multispectral image, dynamically adjusting the deflection angle of the microlens array, and outputting a chromatic dispersion corrected tomographic microscopic image. According to the method, the axial color difference and the transverse color difference of the chromatography system can be remarkably reduced, and the method is particularly suitable for application scenes needing wide spectrum coverage and high signal-to-noise ratio.

The invention belongs to the field of panoramic stitching digital image processing technologies and camera ISP technologies, and particularly relates to a chromatic aberration consistency control method based on front and rear end collaboration. The method comprises the following steps: 1, acquiring statistical information of multiple cameras; step 2, acquiring a current camera control parameter by adopting a front-end chromatic aberration consistency adjustment algorithm; 3, the current camera control parameters are issued to all the cameras, and all the cameras complete exposure imaging according to the current camera control parameters; step 4, acquiring an overlapped part image in each path of camera imaging; step 5, calculating a statistical histogram cumulative distribution function of overlapped part images in each path of camera imaging; step 6, calculating a histogram matching function according to the cumulative distribution function of the overlapped part images in each path of overlapped camera imaging, so that the histograms of the overlapped parts of the two images tend to be consistent; and step 7, according to the obtained histogram matching function, transforming the brightness channel of each pixel in the corresponding camera imaging to complete color difference consistency correction.

The invention discloses a large-view-field space detection optical lens. The large-view-field space detection optical lens comprises a front lens group, a diaphragm, a rear lens group and an image surface which are sequentially arranged from an object side surface to an image side surface, the front lens group filters incident light waves and forms an intermediate image; the diaphragm controls the luminous flux by adjusting the relative aperture of the diaphragm; the rear lens group amplifies the intermediate image, corrects aberration and performs optical imaging through an image surface; the front lens group comprises a first optical filter, a first negative meniscus lens, a first biconvex lens and a second biconvex lens which are sequentially arranged from a position far away from the diaphragm to a position close to the diaphragm; and the rear lens group comprises a first biconcave lens, a third biconvex lens, a fourth biconvex lens, a first positive meniscus lens, a second negative meniscus lens, a second positive meniscus lens, a third negative meniscus lens and a second optical filter which are sequentially arranged from the diaphragm to the image plane. The optical lens provided by the invention has the characteristics of circular light spot, large view field, low chromatic aberration, low distortion, high resolution and small form deviation of light spots in each view field.

An illumination apparatus is provided to correct for chromatic aberration. A light-emitting diode (LED) structure has multiple LED clusters and an optic associated with each cluster. Each cluster is disposed in a cavity in a different total internal reflectance (TIR) structure. Each cluster contains individual LEDs that are configured to emit light of a different color toward the optic. In each cluster: a center of at least one LED within the cluster is disposed at a different distance from a center of the cluster than a center of at least one other LED within the cluster dependent on a wavelength dependence of the optic. For each color, an average position of the LEDs configured to emit the color within the clusters and an average position of the LEDs configured to emit each other color within the clusters are identical.

The application discloses a kind of super-high-definition resolution projection lenses, projection lens successively includes the first lens of positive refractive power from object side to image side, the second lens of negative refractive power, the third lens of negative refractive power, the fourth lens of positive refractive power, the fifth lens of positive refractive power, the sixth lens of positive refractive power, the seventh lens of negative refractive power, the eighth lens of positive refractive power and the ninth lens of positive refractive power, diaphragm is arranged on the surface of fifth lens near object side, third lens and fourth lens form first double cemented lens group, sixth lens and seventh lens form second double cemented lens group.The application provides the projection lens that can realize super-high-definition resolution, can reduce imaging chromatic aberration, can be widely applied in projection lens technical field.

The invention provides a distortion and chromatic aberration combined pre-compensation method and system and MR head-mounted display equipment. The distortion and chromatic aberration joint pre-compensation method comprises the following steps: acquiring a first image to be compensated and gaze point information of a user; determining a first distortion compensation table about a first color and a first pixel color shift table of at least one second color relative to the first color according to the gaze point information; and respectively processing the first image according to the first distortion compensation table and each first pixel color offset table so as to obtain a second image which completes the joint pre-compensation. In this way, high-quality visual output can be achieved with low cost, and the optimal visual effect at different observation angles is achieved.

An imaging system and methods are presented for determining a size of a viewed object through a monocular endoscope. The system includes an imaging device mounted on the endoscope, at least one light source disposed in a fixed position relative to the imaging device, and a processor configured to receive input from the imaging device and analyze at least one of shadow effect from the light source, structured lighting provided by the light source, multi-point illumination including the light source, time-of-flight involving light pulses from the light source, and lateral color aberrations from the light source to determine the size of the viewed object.

This invention discloses a beam expander lens for laser scanning projection, relating to the field of laser projection display technology. It includes a first lens group, a second lens group, a third lens group, and a fourth lens group, arranged sequentially along the optical axis. These four lens groups together form the complete lens. The first, second, third, and fourth lens groups are arranged in a positive-negative-negative-negative optical power configuration. Through innovative optical architecture and optical power allocation, a large-angle beam expander function is achieved within a space of less than 35mm in total length, greatly saving internal space. By utilizing the chromatic aberration correction capability of the first lens group and the aberration correction capabilities of the second, third, and fourth lens groups, high-contrast imaging is achieved across the entire field of view and wavelength range, with concentrated dot matrix energy, meeting the requirements of high-resolution projection.

The invention discloses a panoramic head-up display device based on double-LBS projection, and relates to the technical field of head-up display, the panoramic head-up display device comprises a double-LBS projection unit, a projection optical system, a glass projection surface and an image processing and control unit, the double-LBS projection unit is used for emitting two beams of three-color laser and performing two-dimensional deflection and modulation on the three-color laser; the glass projection surface comprises a glass substrate and an optical anti-reflection film located on the glass substrate, the scheme that the two LBS projection modules are spliced is adopted, the bottleneck that the field angle of a single LBS module is limited is fundamentally broken through, display of a panoramic large picture is successfully achieved, and meanwhile the effect that the field angle of the single LBS module is limited is achieved. The image processing and control unit is used for carrying out geometric correction and pixel-level brightness and chroma fusion on the overlapped region, so that the difficult-to-avoid splicing mark problems such as uneven brightness, chromatic aberration and geometric dislocation in the traditional multi-module splicing are effectively eliminated, and finally, a visual integrated, coherent and seamless high-quality virtual image is presented; and the impression immersion degree and the information display integrity are greatly improved.

The invention discloses an endoscope imaging optimization method, and belongs to the technical field of medical optical imaging and image processing. The method comprises the following steps: firstly, obtaining a super-structure lens distortion image, a high-definition truth value image and a semantic segmentation label; extracting multi-scale initial features through a multi-branch encoder; carrying out feature enhancement and self-adaptive downsampling by utilizing a dynamic super-surface feature extraction module; constructing robust features through a dynamic parameter generation module in combination with the high-halal truth value image; then, extracting contour guide features from the high-halal truth value image and fusing the contour guide features with robust features; and finally, image segmentation and recovery tasks are executed in parallel, and a segmentation mask and a distorted image are output. By fusing physical prior and data driving, the problems of chromatic aberration, information dispersion and the like of super-structure lens imaging are effectively solved, and the image definition, the small focus recognition precision and the model generalization ability are remarkably improved.

The invention discloses an intelligent detection method and system for garment quality inspection, and relates to the technical field of computer vision and intelligent manufacturing. The method comprises the following steps: carrying out pixel-level feature analysis on two-dimensional image data, identifying a sewing line and a printing area, and mapping the sewing line and the printing area to a unified space coordinate system; reconstructing the three-dimensional surface form of the garment based on a stereoscopic vision algorithm, and calculating the dimensional deviation of key parts; converting the spectral data into a CIELAB color space, and carrying out optical distortion correction on local chromatic aberration in combination with a three-dimensional curvature; and under a unified space coordinate system, performing correlation analysis on the stitches, the dimensional deviation and the corrected space distribution, identifying a composite defect which cannot be judged by a single defect, generating a correlation defect identifier, and finally forming a quality report. The technical problems that in the prior art, local chromatic aberration is easily influenced by three-dimensional curved surface deformation and optical distortion of ready-made clothes, information such as dimensional deviation, sewing and printing defects and the local chromatic aberration is isolated, comprehensive correlation analysis is lacked, and consequently the detection accuracy is insufficient are solved.

The application discloses a machining head for microjet laser processing, and relates to the technical field of microjet laser processing. The machining head comprises an objective lens, a window sheet, a water cavity and a nozzle, and the objective lens, the window sheet, the water cavity and the nozzle are coaxially arranged in sequence along a first direction. The objective lens comprises a lens barrel and first double cemented lenses, second double cemented lenses and a positive meniscus lens which are coaxially arranged in sequence in the lens barrel. The lens barrel comprises a first port and a second port, and the first direction is the direction from the first port to the second port. The spherical aberration generated by the combination of the first double cemented lenses, the second double cemented lenses, the positive meniscus lens and the window sheet satisfies a first preset range, and the chromatic aberration generated satisfies a second preset range. Thus, the chromatic aberration of blue light and green light can be corrected, and the applicability of the objective lens is improved.

The present invention relates to a method for correcting a spherochromatic aberration that occurs when examining a sample with a microscope. The microscope comprises an objective lens and a corrective device arranged in a beam path of the microscope for correcting a spherical aberration. According to the method, data for describing the spherical aberration as a function of a wavelength of light imaged by the microscope are provided. A sample is examined with the microscope, and at least one spectral range of the light imaged by the microscope is determined.A control parameter of the correction device is determined based on the provided data describing the spherical aberration as a function of wavelength for the at least one determined spectral range, in order to minimize the spherical aberration for the at least one determined spectral range. The correction device is then set to the determined control parameter. The invention further relates to a microscope, which is in particular a light microscope.

A chromaticity attribute evaluation method and apparatus (200), a computer device, a storage medium, and a product. The chromaticity attribute evaluation method comprises: calculating a first chromatic aberration ΔE1 of a chromatic aberration-free group under an illumination light source, the chromatic aberration-free group being a combination of a standard sample and a chromatic aberration-free product (S100); calculating a second chromatic aberration ΔE2 of a group being evaluated under an illumination light source, the group being evaluated being a combination of a standard sample and a product being evaluated (S200); acquiring a false positive probability of determining a chromatic aberration-free group as "having a chromatic aberration" and a true positive probability of determining a group being evaluated as "having a chromatic aberration" (S300); inputting the false positive probability and the true positive probability into a quantization model of the chromatic aberration resolution threshold to obtain a chromatic aberration resolution threshold of the product being evaluated (S400); inputting the false positive probability and the true positive probability into a quantization model of the chromatic aberration determination bias to obtain an estimated determination bias value of the product being evaluated (S500); and on the basis of the chromatic aberration resolution threshold and the estimated determination bias value, acquiring the chromaticity attribute evaluation result of the product being evaluated (S600).

This invention discloses a projection lens and projection system, including an aperture stop, a front group of lenses and a rear group of lenses located on either side of the aperture stop. A diffractive lens is disposed in the rear group of lenses. The diffractive lens includes a lens substrate, one side surface of which has a first diffraction structure, a first coating covering the first diffraction structure, and a second diffraction structure on the side surface of the first coating facing away from the lens substrate, with a second coating covering the second diffraction structure. By introducing a diffractive lens into the projection lens, and the diffractive lens having a double-layer diffraction surface, the system can maintain a high diffraction efficiency through the mutual matching of refractive indices, while simultaneously utilizing the negative chromatic aberration characteristics of the diffraction surface to complement the positive chromatic aberration of the lens's refractive surface. This significantly reduces chromatic aberration in the optical system and overcomes the problem of red and blue fringing in projected text. The introduction of the diffractive lens also provides more optimization freedom for the entire optical system, thereby achieving a small size and high performance for the projection lens.

The invention discloses an on-line real-time monitoring and testing system and method for color difference of a colored film. The method comprises the following steps: acquiring a film image by adopting an optical detection module; the reflection calibration module compensates transmissivity fluctuation of the thin film through a reflection plate located below the thin film, and provides a calibration reference by means of a standard material and a calibration plate with the same height; the motion synchronization module realizes synchronization of high-precision camera acquisition and film motion so as to eliminate motion blur, and adjusts the light source intensity of the optical detection module based on the real-time light transmittance feedback of the film; and the data processing module dynamically updates a conversion matrix from RGB to LAB by using the data of the calibration plate so as to compensate system temperature excursion, obtain an E threshold value and generate a color difference distribution thermodynamic diagram. According to the invention, the problem of inaccurate chromatic aberration measurement caused by factors such as film light transmittance fluctuation, system temperature excursion and motion blur in the prior art is solved, real-time and accurate monitoring and rapid analysis of the film chromatic aberration in the production process are realized, and the method is suitable for film color quality control in a high-speed continuous production scene.

A system for chromatic aberration and geometry calibration and validation of VR HMDs has a left eye display and a right eye display, comprises a measurement device with a left (11) and a right (12) camera. A control unit, connected to the two cameras, is configured to deliver control signals to the HMD when attached to the measurement device and with the camera IPD is equal to the HMD IPD and a virtual IPD, the control unit is configured to effect a measurement comprising the steps of: creating a virtual target object having am image center identifying element (523) for each camera (11, 12) and a plurality of predetermined points (525) within the FOV of the cameras, calculating and transmitting the images of said virtual target object to the displays of the HMD, taking the images of the displays with the cameras, detecting the virtual object (535) within the images, determining the shift (555) for the plurality of predetermined points (525) of the virtual object, for creating a chromatic aberration heatmap and a subsequent chromatic aberration validation, or for calculating the distortion of the predetermined points within the FOV of the cameras for creating a geometric correction mapping for the HMD for a geometry calibration of the HMD; or for using the shift for creating a heatmap for the HMD and determining the geometry validation or denying the geometry validation.

A micro light-emitting display module includes sequentially stacked a substrate, a light-emitting chips, an original sealant layer, and a repair sealant layer, the original sealant layer is located in a first display area and a second display area, and the repair sealant layer is located in the first display area, A mass proportion of optical particles in the repair sealant layer is different from that of optical particles in the original sealant layer, and / or, the types of the optical particles in the repair sealant layer is different from that of the optical particles in the original sealing layer. By optimizing the types and the mass proportion of the optical particles in the repair sealant layer, the color difference between the repaired first display area and the normal second display area could be made close.

The invention relates to the technical field of optical imaging, in particular to a low-cost large-aperture high-definition vehicle-mounted lens and an imaging method thereof.The optical system of the lens is composed of a first lens body, a second lens body, a third lens body, a diaphragm, a fourth lens body, a fifth lens body and a sixth lens body which are sequentially arranged from the object side to the image side along the optical axis; wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are glass spherical lenses, and the sixth lens is a glass aspheric lens. The lens material is reasonably selected, and the focal power, the surface type and the diaphragm position of each lens are reasonably distributed, so that the lens has the advantages of large aperture, high resolution, athermalization function, large clear aperture, high light transmission capability and bright and clear imaging pictures in different light environments; meanwhile, short-wave chromatic aberration is considered, and it is guaranteed that the imaging picture does not have the purple edge phenomenon.

The invention discloses a large-view-field low-distortion infrared telecentric scanning objective lens which comprises a lens body, the lens body is composed of a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged along an axis, the first lens is a positive lens, the second lens is a negative lens, the third lens is a negative lens, the fourth lens is a meniscus positive lens, and the fifth lens is a negative lens. The fifth lens is a positive lens, and the first lens and the second lens are cemented lenses. According to the invention, through combination of a plurality of lenses and the balsaming lens, high optical index, good temperature adaptability, low distortion, large target surface and large entrance pupil diameter are realized; by reasonably distributing the focal power of each lens and adopting the combination of optical materials with specific refractive index and Abbe number, various aberrations such as spherical aberration, curvature of field, chromatic aberration and the like are effectively corrected, so that high-quality imaging with system RMS wavefront less than 0.02 lambda is realized, the distortion is strictly controlled below 0.02%, and the imaging quality is greatly improved. And a sub-pixel-level accurate positioning capability is realized for high-precision machine vision and measurement detection.

The invention belongs to the technical field of optical lenses. The invention relates to a preparation method of a bionic mud light control high-definition low-color-difference sunglass lens, which comprises the following steps: S31, adding raw materials into a reaction kettle according to a formula proportion, mixing and stirring, and respectively preparing a prime coating and a top coating; s32, the surface of the optical lens is coated with the prime coating, an optical coating with the thickness of 2.0-4.0 microns is formed after photocuring, and standing is conducted for 4-6 h at the room temperature for standby application; and S33, the surface of the optical lens containing the prime coat is coated with the topcoat paint, an optical coating with the thickness being 1.0-2.0 microns is formed, finally, the optical lens is put into a constant-temperature oven to be baked and cured, and the surface of the optical coating is cured to be integrated with the optical lens. The sunglass lens is obtained by coating the self-made reactive MOF dye, the volume expansion monomer and the coating prepared through formula optimization design on the lens, and the problem that the detail resolution of the current sunglass lens is poor after the sunglass lens is blocked by 45-90% of light is effectively solved.

The invention discloses a double telecentric lens, an optical system and semiconductor equipment, and belongs to the technical field of optical equipment. The double telecentric lens provided by the invention comprises a first lens group, a second lens group, a third lens group and a fourth lens group which are sequentially arranged along an optical axis direction. The first lens group is sequentially composed of a first prism, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. And the second lens group consists of a seventh lens, an eighth lens, a ninth prism and a tenth lens in sequence. And the third lens group consists of an eleventh lens, a twelfth prism and a thirteenth lens in sequence. And the fourth lens group consists of a fourteenth lens and a fifteenth parallel plate in sequence. In the scheme, the double telecentric lens adopts an optical architecture in which the front lens group and the rear lens group cooperate, and the front lens group serves as a short-focus convergence unit to primarily converge object light and correct basic chromatic aberration; and the rear lens group is used as a long-focus imaging unit to balance aberration and realize high magnification and a flat image surface.

The utility model discloses a cloth production detection device which comprises a left rolling support, a right rolling support and a conveying belt, the conveying belt is connected to the left rolling support and the right rolling support in a sleeved mode, and a support is further arranged between the left rolling support and the right rolling support. Connecting frames are installed at the left side end and the right side end of the support respectively, a six-in-one gas detector and a visual camera are installed on the two connecting frames respectively, a transmission mechanism is further connected to the right rolling support, a controller is further placed at the side end of the conveying belt, and the controller is electrically connected with the six-in-one gas detector and the visual camera. The support is further arranged between the left rolling support and the right rolling support, the six-in-one gas detector and the visual camera are installed on the support, the six-in-one gas detector can detect bad gas volatilized on cloth, and the visual camera can rapidly detect cloth dead pixels, dyeing chromatic aberration and cloth flaws. And the product percent of pass and efficiency are effectively improved, and defective products are reduced.

A retinal projection device to be mounted on a near-eye wearable device includes: a light source that emits laser light; a movable mirror that performs scanning with the laser light; and a reflector that projects an image onto a retina of a user wearing the near-eye wearable device by reflecting the laser light having passed through the movable mirror and irradiating the retina with reflected light. The reflector includes: a reflective layer that reflects the laser light at a reflection angle that changes depending on a wavelength of the laser light and emits the laser light as the reflected light; and a phase correction layer that corrects chromatic aberration of the reflected light.