269 results about "Point light source" patented technology

The invention discloses an infrared and visible light image fusion method, electronic equipment and a storage medium, and belongs to the technical field of image processing. The method comprises the following steps: acquiring a weak visible light image and an infrared image corresponding to the weak visible light image; an image fusion network is constructed, the image fusion network is supervised by using a supervised label generated by a pre-trained brightness adjustment network, and the quality of a fused image is constrained by using a pre-trained cue word generation network; and inputting the weak visible light image and the infrared image corresponding to the weak visible light image into the image fusion network for fusion to obtain a fused image. According to the technical scheme, the problem of daytime overexposure existing in a traditional night image fusion algorithm is effectively restrained, and meanwhile the problem of night point light source overexposure is effectively restrained.

The invention relates to the technical field of cloud and machine vision, in particular to a high-precision multi-light-field contact lens flaw detection method and device based on cloud-machine vision, and the method comprises the steps: preprocessing a multi-light-field original image to obtain a point light source image, a bright field image, a dark field image and a preprocessed image; performing glass bowl detection on the preprocessed image, and extracting geometric features of the glass bowl; contour feature extraction is carried out on the printed contact lenses in the glass bowl area; carrying out obvious flaw detection; edge bubble flaw detection, edge flaw detection under a Cartesian coordinate system, edge flaw detection under a polar coordinate system and surface flaw detection based on multiple light fields are carried out. According to the method, various defects of the contour and the surface of the printed contact lens are detected, and the problem that an existing detection method is not high in detection precision and not high in universality is correspondingly solved. The method can be widely applied to an automatic contact lens detection system, the manual reinspection cost is reduced, the production efficiency is improved, and the product yield is improved.

The invention discloses a glue point spraying quality detection method and device and electronic equipment. A glue spraying module, a camera shooting module and a light source are sequentially arranged in the flowing direction of the production line, the glue spraying module is used for spraying glue points on label paper placed on a conveying belt, a preset angle is formed between the light source and the conveying belt, the light source is used for illuminating target label paper sprayed with the glue points, and the camera shooting module is used for shooting a to-be-processed image including the target label paper. A to-be-processed image is preprocessed to obtain a grayscale image; gridding the grayscale image according to the grid division information to obtain a first grid image; according to the first grid image and a preset reference template image comprising a glue point area, determining a target grid area of a glue point sprayed in the first grid image and corresponding glue point position information; according to the glue point position information, the glue point detection result of the sprayed glue point under the at least one spraying quality evaluation index is determined, and the precision and efficiency of glue point spraying quality detection are improved.

The invention relates to the technical field of cloud and machine vision, in particular to an efficient multi-light-field contact lens flaw detection method and device based on cloud-machine vision, and the method comprises the steps: preprocessing a multi-light-field original image to obtain a point light source image, a bright field image, a dark field image and a preprocessed image; performing glass bowl detection on the preprocessed image, and extracting geometric features of the glass bowl; contour feature extraction is performed on the printed contact lenses in the glass bowl area based on the geometric features of the glass bowl; and carrying out multi-light-field-based surface flaw detection on the basis of the plurality of feature images of the printed contact lens. According to the method, the multi-light-field original image is preprocessed, so that various feature images are obtained, and flaw detection of edges and printing areas is carried out from multiple aspects. The contact lens image acquired by the high-resolution camera is further utilized, and the image is automatically identified, so that the purposes of reducing the labor cost, saving the time and improving the production yield are achieved.

The invention discloses an event camera high-precision calibration method for space situation awareness. The event camera high-precision calibration method comprises the following steps: establishing a combined calibration frame of a fixed star simulator, a high-precision turntable and an event camera; controlling the high-precision turntable to rotate, collecting event flow information generated by the relative motion point light source, and obtaining a gray value of the latticed track image; extracting a connected domain, counting crossed overlapped pixels and pixel overlapped areas in the horizontal direction and the vertical direction, and calculating a coarse centroid position; determining a space window and a time window, determining a centroid position based on a time interpolation gray centroid positioning algorithm, and performing linear fitting on the centroid position to determine a trajectory equation; calculating coarse centroid positions of all cross points and a trajectory equation of each space window, and calculating a sub-pixel centroid position based on the vertical trajectory equation; and the internal and external parameters of the event camera are optimally solved based on the corresponding relation between the sub-pixel centroid position and the rotary table angle. The invention further discloses a corresponding system, electronic equipment and a computer readable storage medium.

The invention discloses a multispectral holographic imaging system and an imaging method. The system comprises a multi-wavelength light source module which is composed of a plurality of light source assemblies which are independently driven and have different wavelengths; the optical fiber coupling module is composed of a plurality of optical fiber bundles which are connected with the emergent end face of the light source assembly and used for restraining optical signals of the light source assembly as point light sources. Light signals of the light source assembly are constrained to the light emitting area to form an equivalent point light source; the image acquisition module comprises a sample jig and an image sensor which are coaxially arranged with the emergent end face of the optical fiber bundle, and the image sensor is used for acquiring spectral interferograms of the object light and the reference light; and the control processing module is used for sequentially controlling the switching of each wavelength light source assembly, analyzing and processing a plurality of spectral interferograms, and reconstructing the three-dimensional morphology of the sample through an angular spectrum diffraction algorithm. The problems of aberration, field depth limitation, view limitation, complex structure, high cost, resolution limitation and the like in the traditional microscopic imaging technology can be solved.

The invention relates to a structured light illumination confocal super-resolution measurement system and method, and relates to the technical field of optical measurement. The system comprises a digital micromirror device (DMD), a sample platform, an electric displacement platform, a microscopic imaging assembly, a complementary metal oxide semiconductor (CMOS) imaging assembly and computer equipment, and the DMD is used for adjusting the point light source array and the structured light field. According to the DMD-based confocal super-resolution measurement method, a structured light field and a signal-noise separation technology are combined, and high-precision and high-resolution three-dimensional surface reconstruction can be realized. By using the flexibility of the DMD and the advantages of the super-resolution technology, the spatial resolution and speed of confocal imaging are effectively improved, so that the measurement process is more accurate. In addition, low-rank decomposition and self-supervised deep learning methods are fused, the image reconstruction process is optimized, noise interference is suppressed, and the overall performance of the system is further improved.

The invention provides a visual tactile sensor, a geometric calibration method and computer equipment, and the visual tactile sensor comprises a base which is internally provided with an imaging unit; the light source module is arranged on the base and comprises 3N single-point light sources which are arranged around the imaging unit and can be independently controlled, and N is larger than or equal to 1; and the elastic housing is arranged on the base in a covering manner, and the imaging unit and the light source module are wrapped in the elastic housing. By constructing the novel curved surface visual tactile sensor and the matched geometric calibration method thereof, the problems that a traditional plane sensor is weak in multi-direction contact sensing capacity, difficult in curved surface calibration and the like are effectively solved, data generated by a physical model are used for training a lightweight neural network, and the accuracy of the curved surface visual tactile sensor is improved. Real-time surface normal prediction under single-frame three-color image input is realized, and the precision and reasoning speed of three-dimensional reconstruction are considered while hardware dependence and calibration cost are remarkably reduced.

The invention discloses a near BBL curve LED white light color mixing method, system and lamp, a first color temperature light source and a second color temperature light source are selected in a preset color coordinate area, and a color point range is determined for each of the first color temperature light source and the second color temperature light source based on calculation of an intermediate color temperature point light source color deviation value extreme value on a target light mixing path; and selecting the first color temperature light source and the second color temperature light source of which the color coordinates are located in the corresponding color point range, and adjusting the luminous flux output proportion of the two light sources for light mixing so as to form intermediate color temperature light. The problems that a multi-CCT light and color modulation product adopts two light sources, the color temperature and color tolerance between the two light sources cannot meet the requirements of customers, and the color deviation value of the light sources obviously deviates from a BBL curve are solved.

The invention belongs to the technical field of photoelectric displacement precision measurement, and particularly provides a cylindrical grating scribed line error detection method and system. The method comprises the following steps: firstly, calibrating a cylindrical grating positioning error through two angles, then collecting gray scale data of the cylindrical grating at different measurement angles according to a point light source and a linear array image sensor to calculate a non-coaxial error, and finally removing the non-coaxial error from the positioning error to realize the detection of the scribing error. According to the invention, interference of non-coaxial errors in a scribed line error detection process can be effectively suppressed, the inherent precision of cylindrical grating displacement measurement is effectively improved, and the method is suitable for industrial, aerospace and other scenes with high precision requirements.

The invention relates to an edge enhancement imaging system. The system comprises a point light source; the object side polarization filtering unit is arranged on the light emitting side of the point light source and modulates the light into specific polarized light to irradiate a sample; the imaging unit is arranged on the light emitting side of the object side polarization filtering unit and is used for transmitting the input light field to an imaging surface; the spatial variable polarization modulation element is arranged on a conjugate surface of the point light source relative to the imaging unit and is used for performing spatial variable polarization modulation to obtain a modulated light field; and the image space polarization filtering unit is arranged between the space variable polarization modulation element and the imaging surface and is used for screening the modulated light field to obtain a light field in a specific polarization direction, and the light field in the specific polarization direction forms an edge enhanced imaging light field on the imaging surface. The invention also relates to a preparation method of the edge enhancement imaging system. The device has the advantages that the imaging effect of edge enhancement in any direction or all directions is achieved, a common microscope imaging system can be compatible, phase modulation is achieved through polarization state transformation, and sensitivity to wavelength is reduced.

The invention discloses an imaging method, an imaging device, a head-mounted display and a storage medium. The method comprises the steps that phase modulation is carried out on spherical waves emitted by point light sources through a mask to change propagation parameters of the spherical waves, the propagation parameters comprise at least one of the phase and the amplitude, the parameters of the spherical waves with different depths are different after the spherical waves are modulated by the mask, and a shot scene comprises a plurality of point light sources; generating a grayscale image based on the spherical wave after the propagation parameter is changed; and based on a preset high-dimensional reconstruction model, performing high-dimensional reconstruction on the grayscale image to generate a high-dimensional image containing depth information. Depth information of spherical waves is captured through a mask, the size, the weight and the cost of hardware are reduced, a grayscale image including the depth information is obtained, high-dimensional reconstruction is performed on the grayscale image, the depth information of each pixel is decoded, the scene content of a shot scene is displayed, meanwhile, the depth information of the shot scene and an object in the shot scene is accurately reflected, and the image quality is improved. And detection of multi-dimensional information of a scene is realized.

The present invention relates to a device and method for three-dimensional detection of surface defects of large-aperture curved optical elements, belonging to the field of three-dimensional detection of surface defects of optical elements. The device includes a mobile platform, a 3D line spectrum confocal sensor, a calibration head, an industrial camera, a telecentric lens, a ring light source, a point light source, and a camera axis fine-tuning device, etc. The method includes the following steps: positioning and focusing the element to be tested; scanning the 3D line spectrum confocal sensor to obtain the defect position and three-dimensional information of the defect; switching to a two-dimensional defect detection module to obtain two-dimensional information of surface defects; and comprehensively analyzing the two-dimensional information and the three-dimensional information to obtain the three-dimensional detection results of each defect on the surface of the element to be tested. The present invention realizes rapid positioning and high-precision three-dimensional detection of surface defects of large-aperture curved optical elements by carrying two defect detection modules on a mobile platform.

The embodiment of the invention discloses an imaging module, detection equipment, a detection method and related equipment, and the imaging module comprises a lens unit, a point light source assembly, an annular light source assembly and a reflector assembly, so that when a to-be-detected object with a side surface is detected through the imaging module, the to-be-detected object can be placed below the reflector assembly; the light emitted by the annular light source assembly can illuminate the surface and the side face of the to-be-detected object, the side wall of the to-be-detected object can be imaged through a reflector of the reflector assembly, the to-be-detected object is focused through the lens unit during image collection, and the reflector assembly can be used for collecting the images of the surface and the side face of the to-be-detected object at the same time. Based on the imaging module provided by the embodiment of the invention, the image of the surface of the to-be-detected piece and the images of the plurality of side surfaces can be collected at the same time, the detection efficiency can be greatly improved, the yield of the to-be-detected piece is guaranteed, and especially the detection efficiency of a lens can be improved.

The invention relates to the technical field of vehicle-mounted equipment testing devices, and discloses a method and a device for batch testing of imaging quality of vehicle-mounted multi-type cameras, a plurality of to-be-tested camera modules are assembled on a six-degree-of-freedom adjustable clamping platform, and the platform is provided with a plurality of groups of clamping bases capable of three-dimensionally rotating and radially moving; a preset cross graph card is arranged in front of the platform, four vertical point light sources are uniformly distributed on the cross graph card, and an auxiliary camera module is arranged on the central axis; turning on the light source and the camera module, resetting the cross graph card, assisting the camera module to shoot and analyze whether the point light source coincides with the marked line or not, and adjusting the posture if the point light source does not coincide with the marked line; after superposition, moving the clamping base, testing whether the shooting center of the to-be-tested camera module coincides with the center of the graphic card, and if not, adjusting the clamping posture; the rest modules are tested in sequence, and finally the graphic card is removed for follow-up testing; the technical problem that the efficiency is low due to the fact that a split type independent testing method is adopted for multiple types of camera modules in the prior art is solved.

The invention provides a binocular vision positioning method and system in a weak light environment based on deep learning enhancement, and belongs to the technical field of computer vision. The method comprises the following steps: acquiring a binocular vision image; carrying out edge feature enhancement on the image by adopting an edge detection model; performing line feature extraction on the image after edge feature enhancement by using a straight line detection algorithm, and eliminating false line segments generated by point light source scattering by using a light erasure logic; extracting point features of the image by using an image point feature extraction model; based on the obtained point features, performing feature matching by adopting an image matching model; on the basis of a key frame selection strategy, frames with position and angle changes and low feature matching number are screened for back-end optimization, and a final positioning track is output; and the back-end optimization process comprises the step of optimizing the inter-frame pose by constructing a re-projection residual model of point and line features. The feature extraction stability in a weak light environment is improved, the light scattering interference is effectively inhibited, and the practicability is improved.

The application provides a multi-channel imaging optical eccentricity correction method applied to a multi-channel camera, and the optical eccentricity correction method comprises the following steps: real-time shooting of the inside of an integrating sphere by the multi-channel camera; adjusting the position of each lens relative to the lens chip to make the brightness of the four corners of the video display page of the multi-channel camera consistent; simultaneously shooting an infinite faraway same point light source by N lenses of the multi-channel camera, so that the video display page of the multi-channel camera simultaneously displays N shooting pictures, and the point light source is displayed on each shooting picture; and taking the image plane position of the point light source in one of the shooting pictures as a reference, adjusting the image plane positions of the point light sources in other shooting pictures to be the same as the reference. The multi-channel imaging optical eccentricity correction method can reduce the relative eccentricity degree of the lens and the chip, improve the common field of view of the multi-channel camera, and improve the shooting efficiency.

The invention discloses a method for calculating large-area displayable graphic and text information under a point light source. The method comprises the following steps: S1, digitizing the graphic and text information; s2, point light source parameter modeling; s3, carrying out basic modeling on the microscopic fringes; s4, stripe width correction is carried out in combination with an image-text information model; and S5, carrying out block calculation and splicing on the large-area region. By digitally processing the graphic and text information, the complex graphic and text can be converted into an accurate pixel matrix, a clear data basis is provided for subsequent calculation, and the accuracy of the graphic and text information at a processing source is ensured; point light source parameter modeling is carried out, the position, illumination intensity and other key parameters of a point light source can be accurately captured, a reliable optical basis is provided for subsequent microcosmic fringe design, and calculation deviation caused by fuzzy light source parameters is avoided. And a brand new microscopic stripe basic model is constructed, so that stripe distribution can more flexibly adapt to point light source characteristics and graphic and text information requirements.

The invention relates to a time measurement target plate, a delay detection device and an imaging equipment detection system. The time measurement target plate comprises a point light source array unit and a point light source driving unit connected with the point light source array unit; the point light source array unit comprises point light sources which are arranged in sequence; the point light source driving unit independently drives a single point light source, and the point light source driving unit can control the point light source to be lightened at a preset frequency. Through independent control of the point light source, the control efficiency of the point light source is improved, the lightening delay is reduced, and the time measurement target plate has stronger expansibility.

According to the multi-light-spot light source system for detector adjustment and the generation device, a plurality of light sources are arranged and controlled through a multi-light-spot light source array, and the spatial distribution of a light field can be flexibly adjusted. A target plate and a spacing adjusting mechanism are arranged at the front end of the system, so that the center and four angular points of a light-sensitive surface of the detector can be imaged in the precise adjustment process of the optical system detector. By synchronously acquiring the change information of the imaging light spots at the five key positions in the assembling and adjusting process, the deviation between the current position and the ideal position of the detector is effectively confirmed, multi-view-field synchronous adjustment is realized, and the assembling and adjusting efficiency of the detector is remarkably improved.

The present invention discloses a point spread function calibration system and method for a digital imaging system based on a star point target. In the system, the star point object space target is composed of a point light source array, which is fixedly mounted on an object plane base via a point light source adjustment component. The point light source array is evenly spaced on the object plane base, and point light sources in different regions are fixedly mounted on the object plane base via corresponding point light source adjustment components. The digital imaging system is mounted on a translation stage, and the point light source array is located in a quarter of the ideal object plane of the digital imaging system. The method utilizes the system to perform point spread function detection on the digital imaging system in a sub-field of view. The present invention realizes the construction of a point spread function calibration device for a digital imaging system, and uses Zernike ki to optimize the point spread function calculated from the real-shot image, thereby effectively calibrating the point spread function of the digital imaging system.

The present application relates to computer vision and three-dimensional reconstruction technical field, disclose a kind of based on image recognition's building decoration component three-dimensional modeling method, method includes the following steps: receiving near-axis active illumination image sequence, solving camera pose and equivalent point light source trajectory;Inverse projection two-dimensional foreground mask generates maximum base envelope grid;Combining brightness gradient and texture high-frequency edge tensor field removes false shadow, extract effective sweep shadow mask;Tracking shadow residual optical flow displacement and combining light source trajectory analysis absolute depth, generate local three-dimensional point cloud;Surface reconstruction is executed to point cloud and opening plugging constructs negative space primitive entity grid;Extract the Laplace curvature energy of interface to generate normal shrinkage constraint, control entity grid after shrinkage and envelope grid execute Boolean difference set operation output model.The present application extracts absolute depth in featureless recessed area, and eliminates the boundary interference and distortion of grid Boolean operation.

This invention relates to the field of precision alignment technology, specifically to an astigmatic differential confocal alignment system and method capable of synchronous imaging. The astigmatic differential confocal alignment system includes: an astigmatic differential confocal optical path system and an imaging optical path system sharing the same objective lens; the astigmatic differential confocal optical path system includes a laser, a collimating and expanding beam system, a polarizing beam splitter cube, a quarter-wave plate, a long-pass filter, a short-pass dichroic mirror, an objective lens, a non-polarizing beam splitter cube, a plano-convex cylindrical lens, and two four-quadrant photodetectors connected in sequence; the imaging optical path system includes a visible light point source, a beam splitter, a short-pass dichroic mirror, an objective lens, a sleeve lens, and a camera connected in sequence; the two optical path systems are coaxial and synchronized. When the defocus error signal FES crosses zero, the camera synchronously acquires a clear morphological image of the surface of the sample under test, achieving synchronization of alignment and imaging.

To achieve a good visual effect. [Solution] An image forming apparatus 1 creates a decorative medium MC1 by sequentially superimposing and printing a lower color toner image PNL, a silver toner image PS having a background area AB and a decorative area AC, a transparent toner image PC, and an upper color toner image PNU on the surface of a blank medium M. As a result, the decorative medium MC1 can reduce the rate at which a portion of light transmits from the back side of the medium M compared to when the lower color toner image PNL is omitted, making the decorative area AC less visible. This allows the image forming apparatus 1 to create a good visual effect in which the decorative area AC appears and disappears on the surface of the decorative medium MC1 when the relative positions and angles of the observer's viewpoint VP, light source LS, and decorative medium MC1 are changed in various ways.

The invention relates to a method for solving undersampling in a point spread function test process of an optical imaging system. The method comprises the following steps: acquiring a plurality of undersampling star point images with micro-displacement; calculating centroid coordinates of star points in each under-sampling star point image; registering the plurality of point light source defocused spot images according to the centroid position to generate a high-resolution point light source defocused spot reconstructed image; and reconstructing an image fitting point spread function according to the high-resolution point light source defocused spot. According to the under-sampling solution in the testing process of the point spread function of the optical imaging system, a brand-new image registration model containing factors such as the pixel overlapping ratio, the weight coefficient and the flat field coefficient is provided, the authenticity of gray level distribution of a registration image is improved, the testing precision of the point spread function of the optical imaging system is further improved, and the testing accuracy of the point spread function of the optical imaging system is improved. The problem of undersampling in the point spread function test process of the optical imaging system is solved.

The invention discloses a method for judging a focal length. The method comprises the following steps of: 1, preliminarily judging a focal position by adopting point light source imaging; 2, finely judging a focus position by adopting a collimated light source; step 3, obtaining a gray value of an imaging point; step 4, obtaining a gray value of the imaging point; 5, drawing an imaging point gray average value function and an imaging point gray variance function, and drawing a position relation with the sample on the same horizontal coordinate; and selecting peak values of the gray average value function and the gray variance function, selecting the two peak values to correspond to the middle of the position of the sample, and judging the position as a focus. According to the method, the specific error of a single evaluation function is eliminated or reduced, the accuracy of focus position judgment is improved, the focus position is judged by combining the focal plane pixel point gray variance and the focal plane pixel point gray average value function, and the actual use requirement is met.

The application belongs to the technical field of positioning and measurement, and particularly relates to a target positioning method and device combining CSI coarse positioning and Y-type CCD fine correction, which comprises the following steps: S1, CSI acquisition equipment is arranged in a target area, and CSI data between a sending end and a receiving end is acquired; S2, a Y-type CCD sensor is geometrically calibrated and a coordinate system is corrected, and coordinate reconstruction is completed; S3, the CSI data is preprocessed, noise is removed, and input is normalized; S4, time domain features of the CSI are extracted by using a time domain branch; S5, frequency domain features of the CSI are extracted by using a frequency domain branch; S6, a gating fusion module is used to fuse the time domain and frequency domain features, and the approximate position coordinates of a target are output; S7, the Y-type CCD sensor is controlled to optically acquire a target area, and point light source coordinate information is acquired; and S8, error correction is performed on the data acquired by the Y-type CCD, and the accurate position coordinates of the target are output.

This application belongs to the field of image processing and specifically discloses an imaging simulation method, device, and electronic device based on a point spread function. The method includes: establishing a light source model corresponding to an image captured by an optical system, obtaining the point spread function of the point light source of the light source model after being acted upon by the optical system; obtaining error point spread functions under different optical system models; performing weighted averaging of each error point spread function according to preset weights to obtain a comprehensive point spread function; forming an array diagram of the comprehensive point spread function according to light distribution, convolving the array diagram with the captured image to obtain a degraded image that simulates the blurring effect caused by aberrations; applying a distortion model of the optical system to the captured image to obtain a deformation effect image that simulates the distortion, and implementing imaging simulation of the optical system based on the deformation effect image and the degraded image. This application can improve imaging accuracy and efficiency.

This invention discloses a closed-loop optical architecture for suppressing stray light at the source of a light source, relating to the field of lighting optics design technology. The invention includes a light-emitting source and a mounting substrate, with an enclosing structure matched to the outer periphery near the light source. A continuous light-absorbing surface is formed on the inner side of the enclosing structure, corresponding to the lateral stray light overflow path of the light source, used to constrain lateral diffuse light and stray light overflow. A forward light-emitting opening is reserved at the top of the enclosing structure to avoid obstruction of the main axial light path of the light source and maintain the integrity of the forward light-emitting path. The enclosing structure adopts a double-layer composite structure, realizing lateral light absorption and structural shaping functions respectively, and can adapt to various light source arrangements such as point light sources, linear strip light sources, and multi-light source combination modules. This invention, through the bottom-layer optical path structure design of near-end enclosing light control, achieves source suppression of stray light and glare without attenuating forward light emission.

Light-field image projection system having a light source with a single narrow band point light source per color emitting narrow-band light, a splitting device sequentially generating incident light beams and form virtual light sources, a spatial light modulator generating a modulated beam light and a virtual image for each incident light beam; and a combiner projecting the virtual images at virtual viewpoints within an eye box region and transmitting natural light from the real world towards the eye box, each viewpoint containing an image of the virtual scene viewed from that viewpoint. The splitting device directs the incident light beams to the spatial light modulator such that the incident light beams are incident on the surface of the spatial light modulator at different angles of incidence. the ratio of luminous intensity of a single virtual light source over the luminous intensity of the narrow-band light is at least 1%.