867 results about "Mirror reflection" patented technology

The invention discloses a machine vision-based intelligent detection method for steel galvanized surface defects, which comprises the following steps: S1, acquiring and preprocessing a steel galvanized surface image to obtain a standardized image; s2, constructing a specular reflection probability graph according to the brightness distribution and the gradient magnitude, and calculating a reflection intensity value; s3, calculating a structure tensor matrix, determining a main direction angle and an anisotropic consistency coefficient, and generating a direction feature matrix; s4, establishing a multi-scale direction adaptive phase kernel function, and performing phase modulation in a frequency domain by adopting an improved phase stretching transformation algorithm; s5, inverse Fourier transform is executed, and a phase response matrix is extracted; s6, performing weighted fusion to obtain a comprehensive phase response diagram; and S7, setting a threshold value according to the noise variance and the statistical characteristics, executing binarization and morphological processing, and outputting a defect region and boundary coordinates. According to the invention, high-precision identification and boundary positioning of steel galvanized surface defects are realized.

A photonic assembly includes: a composite die including a photonic integrated circuits (PIC) die and an electronic integrated circuits (EIC) die, the PIC die including waveguides and photonic devices therein, and the EIC die including semiconductor devices therein; and an optical connector unit including a first connector-side mirror reflector and a first transition edge coupler, wherein the first connector-side mirror reflector is configured to change a beam direction between a vertically-extending beam path through the composite die and a horizontally-extending beam path through the first transition edge coupler.

The invention discloses a laser weld joint welding system based on diffuse reflection material preheating, and belongs to the technical field of laser welding. The system comprises a preheating welding system and a welding workbench, the preheating welding system is composed of a welding laser generator and a preheating device, the welding laser generator is provided with a first laser welding head and a second laser welding head which are used for main welding and auxiliary preheating respectively, and the focusing and working distance can be accurately adjusted; proper sizes of welding light spots and preheating light spots are ensured; the preheating device effectively reflects laser beams and evenly distributes preheating light spots to a welding area through a mirror reflection plate and a U-shaped diffuse reflection light reflection baffle. The system further has an intelligent control function, the laser light source power, the welding parameters and the angle and position of the preheating device can be automatically adjusted according to feedback of the temperature sensor, the laser power and the preheating parameters are automatically adjusted, and the safety of the welding process and the consistency of welding seams are guaranteed.

The invention discloses a high-precision three-dimensional reconstruction method for a complex scene, and the method comprises the steps: obtaining the position and orientation of a camera from a multi-view image through the pose estimation of the polarization camera, and obtaining a normal vector of a scene surface through an MLP network; according to the method, a scene surface normal vector is used for correcting an ambiguous polarization normal vector calculated by using a polarization image, so that a prior normal vector is obtained, and the prior normal vector is input into a pre-trained improved NeuS network to provide additional constraints, so that the geometric blurring problem of a non-texture region and a mirror reflection region is relieved. And compared with depth priori, the network based on the priori normal vector can generate a smooth geometric shape, and can also avoid the problem of depth scale blur among multiple views, thereby obtaining more accurate three-dimensional information. According to the method, high-precision reconstruction can also be carried out on an object with shielding and an object with a thin structure, and better geometric reconstruction can also be carried out on a scene with sudden depth change.

The invention belongs to the technical field of image processing, and particularly relates to a titanium cylinder inner wall defect detection method and system.The method comprises the steps that a titanium cylinder inner wall image is collected, and a highlight area and boundary pixel points thereof are extracted through threshold segmentation and corrosion operation; calculating a scale adjustment factor by combining a highlight area proportion and a boundary gradient amplitude, dynamically scaling the reference kernel according to the scale adjustment factor, and determining a standard deviation of a multi-scale Gaussian kernel; constructing a Gaussian kernel function of each scale, and calculating the sum of difference values of the titanium cylinder inner wall image and convolution results of all scales in a logarithm domain to obtain an enhanced titanium cylinder inner wall image; and performing threshold segmentation on the enhanced titanium cylinder inner wall image to identify a defect area. According to the method, the filtering scale is adjusted in a self-adaptive mode, mirror reflection interference is effectively restrained, halo artifacts are eliminated, and tiny defects covered by highlight are accurately recognized.

The invention relates to the technical field of image compensation, in particular to a reflection compensation method based on image processing, and provides the following scheme: acquiring an environment panoramic image by using a panoramic camera to establish a scene global coordinate system, and acquiring a multi-view original image in combination with a camera array arranged in the circumferential direction of an object; determining a rotation symmetry axis according to the multi-view contour features, reconstructing a three-dimensional geometric body, and calculating normal distribution and curvature change; generating a prediction image based on diffuse reflection and specular reflection hypothesis in the surface expansion domain through virtual visual angle disturbance, identifying a reflection region according to color and gradient consistency, and generating a reflection mask; and performing texture reconstruction on the reflective area by using geometric registration and multi-view compensation, and finally performing splicing and fusion to obtain a non-reflective high-fidelity panoramic image. The method does not need to change the field illumination condition, and can achieve the precise recognition and compensation of the complex curved surface reflection in the cultural relic in-situ collection environment.

The invention discloses an induced water-guided laser generating device. A high-pressure water cavity is formed in a shell of a water-optical coupler of the induced water-guided laser generating device; a light-transmitting window is formed in the middle of a top plate of the shell and used for laser incidence. A water inlet is formed in the side wall of the shell and used for injecting water into the high-pressure water cavity. An induction channel coaxial with the light-transmitting window is formed in a bottom plate of the shell; the induction channel is in a frustum shape which is gradually reduced from top to bottom; the inner wall of the induction channel is plated with a mirror reflection film; high-pressure water in the high-pressure water cavity is jetted out from the lower end of the induction channel to form micro-jet, and the periphery of the micro-jet is surrounded by gas to form a water-gas interface. According to the induction type water-guided laser generating device, water-guided laser microjet with the outer diameter smaller than the diameter of a laser spot can be manufactured, the alignment requirement of the laser spot and an induction channel can be greatly lowered, and the water-guided laser coupling efficiency can be improved.

The invention relates to the technical field of assembly production lines, and particularly discloses an assembly production line workpiece defect detection method and system based on machine vision. The method aims at accurately detecting the workpiece defects of the assembly production line, firstly, position information of a lens, a workpiece and a light source of a machine vision device is obtained, a basis is provided for subsequent calculation, the detection accuracy is ensured, and then the incident angle of the mirror surface is determined according to the characteristic information of the lens, influences reflected light and imaging and is a key parameter. Then obtaining imaging influence factors according to workpiece characteristics, measuring interference of workpiece surface characteristics on imaging, providing a basis for optimizing reflectivity, calculating specular reflectance through light source position information, reflecting light reflection conditions, combining the specular reflectance and the reflection conditions to obtain collaborative optimization specular reflectance, more accurately evaluating the influence of reflection on imaging, and finally, determining the influence of reflection on imaging. If the reflectivity is greater than a preset threshold value, correction is carried out, a correction angle is obtained to adjust a lens detection angle, misjudgment caused by mirror reflection is reduced, and the detection precision is improved.

The invention discloses a sludge treatment automatic monitoring method based on computer vision, and relates to the technical field of sludge treatment automatic monitoring, and the method comprises the following steps: collecting sludge image information through computer vision, extracting an edge integrity index and a brightness distribution index, and constructing a fusion judgment function based on the time sequence change of the two indexes, determining whether a thin water film exists on the sludge surface or not according to an output result of the fusion judgment function; under the condition of determining that a thin water film exists on the sludge surface, acquiring a pixel highlight gradient polymerization rate, a texture missing fluctuation frequency and an image saturation nonlinear deviation value of a corresponding image region, and establishing a specular reflection image feature recognition matrix; by constructing a multi-dimensional image feature recognition and dynamic regulation and control mechanism, the problem of image misjudgment caused by thin water film mirror reflection in the sludge dewatering process is solved, and accurate recognition and automatic closed-loop control of the real water-containing state of the sludge are achieved.

The invention discloses a fringe projection three-dimensional shape measurement method based on frequency domain and time domain joint coding, and the method comprises the following steps: firstly, embedding a multi-frequency three-step phase shift fringe pattern in the vertical direction based on multi-scale region division, introducing four-step phase shift and complementary Gray code joint coding in the horizontal direction, generating a coding pattern set, and carrying out the projection; after an image is collected, frequency domain transformation and time domain decoding are carried out respectively, and a vertical dominant frequency position, a horizontal period number and a wrapped phase are obtained; then, combining a main frequency position in the vertical direction with a period number and a wrapped phase in the horizontal direction, and extracting a space coordinate of a direct illumination component based on frequency position invariance; and finally, establishing a pixel homonymy point mapping relation between the projector and the camera, and realizing high-precision three-dimensional reconstruction. Compared with a traditional frequency shift method, the method has the advantages that projection patterns are greatly reduced, reconstruction precision and anti-interference performance are improved, and the method is suitable for dynamic three-dimensional measurement under complex illumination conditions such as specular reflection, semitransparent shielding and subsurface scattering.

The invention discloses an intelligent water quality monitoring and evaluating system based on image recognition, which relates to the technical field of environment monitoring, and comprises a fusion module for controlling a polarizer array to rotate based on an environment parameter set, capturing water surface optical images in different polarization directions, and performing image reconstruction through a polarization characteristic tensor decomposition method, generating a high-definition water surface image after reflection suppression; the three-dimensional diagram generation module is used for acquiring a morphology stripe image of the water surface through a DLP projection method, and generating a three-dimensional depth diagram in combination with the high-definition water surface image; the pollution identification module is used for correcting the three-dimensional depth map based on the real-time water temperature data, identifying spatial distribution of pollutants through a dynamic structure element opening and closing algorithm and generating a three-dimensional pollution distribution map; according to the method, mirror reflection noise is suppressed through multi-angle polarization image fusion, and the distinguishability of pollutant characteristics is remarkably enhanced while the image resolution is kept.

The invention discloses a melamine paper surface defect detection system based on optical detection, and relates to the technical field of industrial optical detection, and the melamine paper surface defect detection system comprises a polarized light signal generation module which employs a high color rendering index white light source to irradiate the surface of melamine paper, obtains a surface reflection light beam array carrying different polarization states, and modulates the surface reflection light beam array into eight groups of independent polarized light signals; the multispectral imaging and registering module inputs eight groups of independent polarized light signals into a free-form surface prism group and performs light splitting to generate a diffuse reflection texture image, a mirror reflection image and a near-infrared perspective image, and constructs a three-channel space registering image matrix; and the light path calibration module is used for extracting defect coordinate data and confidence score based on the pixel-level defect thermodynamic image, and performing light path compensation by adopting a real-time feedback regulation mechanism to obtain a dynamically calibrated stable optical imaging signal.

A vehicular exterior rearview mirror assembly includes a mirror head accommodating a mirror reflective element and an illumination module, which includes a light source, a first mask, and a second mask. When the light source is powered, emitted light that passes through the first mask is a first color and emitted light that passes through the second mask is a second color. With the mirror assembly mounted at a vehicle, and when the light source is powered to emit light, light emitted by the light source passes through the first mask to project a first projected image onto a ground region and passes through the second mask to project a second projected image onto the ground region. The first projected image includes a first logo portion having the first color, and the second projected image includes a second logo portion having the second color.

The invention provides a cultural relic crack monitoring system and method based on image processing, and relates to the technical field of image processing. The system is composed of a multispectral image acquisition module, an environment calibration module, an image processing module, a contour recognition module, a crack recognition module, a time sequence evolution analysis module and an output module. The calibration module performs reflectivity normalization according to the material spectrum and real-time illumination and inhibits specular reflection; the image processing module uses multi-scale Retinex to enhance the crack contrast; the contour recognition module is used for extracting candidate contours by using improved Canny; the crack identification module introduces a lightweight CNN to carry out texture analysis and generates crack and texture data; the time sequence evolution analysis module completes multi-moment crack registration and morphological parameter difference; and the output module summarizes the data to generate a chart and a monitoring report. The false detection rate of a traditional method is reduced.

The invention relates to the technical field of satellite height measurement, and discloses a GNSS-R ocean plumb line deviation calculation method, device and equipment and a storage medium. The method comprises the following steps: acquiring a height measurement result, a geoid height and an average dynamic terrain of each GNSS-R mirror reflection point in an ocean area, and calculating a residual geoid height; dividing a global geographic area according to a longitude and latitude target interval to generate a target grid; for any lattice point in the target grid, screening a plurality of GNSS-R mirror reflection points around the lattice point as target points; and determining the weight of the residual geoid height of each target point based on the GNSS-R height measurement precision table, calculating the residual geoid height of the network point through weighted average, and further calculating the corresponding ocean plumb line deviation. By adopting the method, the global ocean plumb line deviation can be quickly calculated based on the GNSS-R sea surface height measurement result, and the accuracy of ocean plumb line deviation calculation is improved.

The invention discloses an illumination adaptability rock crack identification and calibration method based on an image identification algorithm, and relates to the technical field of geotechnical engineering intelligent image identification, and the method comprises the following steps: collecting an illumination incident angle, a polarization state and an illumination gradient corresponding to an image frame, building an illumination time sequence observation layer, and obtaining an illumination time sequence observation layer; forming an illumination feature baseline for crack boundary tracking; and performing coherent phase decomposition on the image sequence based on the illumination feature baseline, stripping mirror reflection and enhancing diffuse reflection texture, and generating a crack drift suspicion image. Through construction of an illumination time sequence observation layer and coherent phase decomposition, illumination interference stripping in a crack image is realized, false drift is eliminated by combining anti-fact playback and time reconstruction, and a dynamic threshold control mechanism is constructed by introducing an anti-illumination mask and an anti-phase pattern and linking a polarized light diaphragm and a shading array. And high robustness of crack identification and closed-loop regulation and control of false early warning are realized.

The invention belongs to the technical field of image processing, and particularly relates to a screw fastening quality evaluation method and system based on image features, and the method comprises the steps: collecting a screw fastening image, and obtaining a complex response diagram through a Log-Gabor filter; obtaining a phase congruency diagram according to each complex response diagram; acquiring gradient directions of pixel points in the phase consistency graph, and constructing an accumulator graph according to the gradient directions and offset points in a preset radius range; according to salient points in the accumulator graph and local signal-to-noise ratios of the salient points, screw positioning points are determined through two-dimensional quadratic polynomial function fitting; the torque value of the screw is obtained according to the screw positioning point driving torque measuring device, and whether the screw is fastened or not is judged. According to the method, the screw is positioned by using phase consistency in the frequency domain, so that the interference of specular reflection and extreme shadow on positioning is overcome, the accuracy of screw positioning is improved, and screw fastening quality evaluation is assisted.

The invention discloses a defect detection system and method for a glass bottle, and belongs to the field of industrial visual defect detection and analysis. The system comprises a GBDM module, the GBDM module is a defect detection module, and the GBDM module comprises a front attention enhancement structure, a rear attention enhancement structure and a defect detection structure, a multi-branch feature extraction structure is used for generating four feature branch diagrams; and the feature fusion structure is used for fusing the four feature branch diagrams. The GBDM module is embedded in the backbone network of the YOLOv8 network model, and multi-branch structures such as wavelet transform, Gabor direction filtering and specular reflection suppression are utilized, so that the feature extraction capability of multiple types of complex defects such as cracks, smudginess and damage on the surface of the glass bottle is enhanced, the generalization capability of the model in a small sample scene is remarkably improved, and the accuracy of the model is improved. The real-time requirement of an industrial scene is met, continuous self-optimization is achieved, and the method has high robustness, high accuracy and high application value.

Aspects of the present disclosure involve a system comprising a computer-readable storage medium storing at least one program, and a method for performing operations comprising: receiving a video that depicts a person. The operations further include identifying a set of skeletal joints of the person. The operations further include identifying a pose of the person depicted in the video based on positioning of the set of skeletal joints (or detecting a hand pose, detecting a mirror frame, or detecting a mobile device). The operations further include determining, based on the pose of the person (or detecting a hand pose, detecting a mirror frame, or detecting a mobile device), that the video comprises a mirror reflection of the person. The operations further include, in response to determining that the video comprises the mirror reflection of the person, causing display of a 3D virtual object in the video.

The invention relates to the technical field of photoelectric detection, and particularly discloses a three-dimensional defect detection method and system based on compound color stripe projection, and the method comprises an upper computer control and processing module which is used for generating a compound color stripe pattern coded with phase difference information, and coordinating and controlling the synchronous operation of the whole system; the structured light projection module is used for receiving the composite color stripe pattern and projecting the composite color stripe pattern to the surface of a measured object at one time; the imaging module is used for receiving the composite colored light reflected after being modulated by the surface of the measured object and separating the composite colored light into monochromatic light signals with different colors for synchronous acquisition; the imaging module further comprises an active highlight suppression unit which is used for dynamically adjusting the polarization direction according to an instruction of the upper computer control and processing module so as to suppress highlight caused by specular reflection. Multiple groups of sine fringes with fixed phase differences are projected to the surface of a measured object at one time. And a plurality of deformed fringe patterns with phase displacement can be synchronously acquired under single exposure.

The invention belongs to the technical field of computer vision, and particularly relates to a blind hole plate hole depth measuring method and system based on distributed cameras 2D and 3D, and the method comprises the steps: projecting laser stripes through a laser, and synchronously collecting a laser stripe image and a blind hole plate 2D gray scale image through the distributed cameras; according to pixel gray scale distribution in a preset window on the laser stripes, adaptively selecting a Gaussian fitting method or a gray scale centroid method to carry out sub-pixel-level center extraction, and generating 3D height data of the blind hole plate; based on the 3D height data and the positioning holes, blind hole center positioning is carried out through affine transformation and image matching; and combining the 3D height data and the 2D grayscale image, judging the measurability of the blind hole according to 2D grayscale features, selectively starting hole depth calculation based on the 3D height data, and comprehensively evaluating the quality of the blind hole. According to the invention, the problems of specular reflection and deep hole measurement are effectively solved, and the precision and efficiency of blind hole depth measurement are remarkably improved.

The invention belongs to the field of optical detection, and particularly relates to a synchronous calibration method for a geometric pose and an optical axis error of a reflective phase deflection system, which comprises the following steps of: taking a plane mirror pose as a reference, establishing redundant geometric constraints under a plurality of poses through mirror image reflection, and jointly solving geometric external parameters of the system; and meanwhile, a reverse ray tracing model and a normal integral model are synchronously constructed in a calibration stage, surface shape data are actually measured by combining an interferometer, a system optical axis error field is explicitly stripped, and decoupling separation of a system structure error and a surface shape error is realized. According to the method, the system building process is greatly simplified, the dependence of a high-precision mechanical auxiliary device is avoided, and the overall detection precision and the low-frequency error control capability of the reflective phase deflection system are effectively improved by synchronously modeling and compensating the optical axis error of the system in the calibration stage; and a technical basis with engineering adaptability is provided for high-precision free-form surface optical detection.

The invention discloses a large-range high-precision angle measurement precision detection device and method for a two-dimensional scanning mechanism. The detection device comprises a two-dimensional scanning mechanism, a multi-tooth indexing table, a photoelectric autocollimator, a marble platform, an angle acquisition circuit, a motion control box, a screw flat plate, a horizontal adjusting gasket, a photoelectric autocollimator mounting tool, an angle acquisition computer, a ground detector and the like. The multi-tooth indexing table is placed on the marble platform plane; the photoelectric autocollimator is mounted on the multi-tooth indexing table through the photoelectric autocollimator mounting tool; a horizontal adjusting gasket is used for adjusting the multi-tooth indexing table and the two-dimensional scanning mechanism to be consistent in parallelism; it is ensured that the photoelectric autocollimator can receive the specular reflection value of the two-dimensional pointing mechanism. The detection method comprises static calibration and dynamic calibration, wherein the static calibration comprises large-period angle precision calibration and small-period angle precision calibration measurement. The invention provides a third-party angle measuring device and a third-party angle measuring method. The third-party angle measuring device can be unfolded around measured equipment and can reach within one arc second.

The invention provides a laser welding in-situ process monitoring device and method based on a molten pool mirror reflection area, and belongs to the technical field of laser material machining. The device comprises a welding plate, a high-power laser is arranged over the welding plate, and a semiconductor laser and a high-speed camera are arranged on the two sides of the high-power laser respectively; illumination laser beams of the semiconductor laser and the axis of the high-speed camera are symmetrically distributed relative to the laser beam direction of the high-power laser and act on the surface of a molten pool at the same time, the semiconductor laser is connected with a semiconductor laser power source, the high-speed camera is connected with a computer, and two band-pass filters and an attenuation piece are arranged in front of a lens of the high-speed camera. According to the laser welding in-situ process monitoring device and method based on the molten pool mirror reflection area, the dynamic behavior of the molten pool can be directly and clearly represented, and a new way is provided for monitoring of the laser welding process.

This electronic device has: a diaphragm that comes into contact with an object being measured, the diaphragm being provided with a light reflection part on a surface on the side opposite from the contact surface of the diaphragm that comes into contact with the object being measured; a light-emitting diode; a throttling part for throttling light emitted from the light-emitting diode; a light-receiving element having a light-receiving surface for receiving light that passes through the throttling part and is regularly reflected by the light reflection part; an output unit for outputting a signal corresponding to light in a light irradiation region formed by the regularly reflected light reaching the light-receiving surface; and a housing for accommodating the light-emitting diode, the throttling part, and the light-receiving element therein. The diaphragm is configured so as to form, together with the housing, a portion of the exterior of the electronic device, and to elastically deform upon being pressed by the object being measured in contact with the contact surface. A boundary line between the light irradiation region and a region other than the light irradiation region on the light-receiving surface, the boundary line being formed by the light that has been throttled by the throttling part and regularly reflected by the light reflection part, moves in accordance with displacement of the contact surface caused by the elastic deformation of the diaphragm, whereby the area of the light irradiation region on the light-receiving surface changes and the output of the output unit changes.

The present invention pertains to an anti-reflection film-provided transparent substrate that has a transparent substrate having two main surfaces, and has, on one of the two main surfaces of the transparent substrate, a diffusion layer and an anti-reflection film in the stated order from the transparent substrate side. When source light is incident on the one of the two main surfaces at an incidence angle of 45° in a state where reflection on the other main surface of the transparent substrate is eliminated, a* and b* at a D65 source light of diffused reflected light at angles of -15°, 15°, 25°, 45°, 75°, and 110° with respect to specularly reflected light satisfy formulae (1) and (2).　(1): -2 ≤ a* ≤ 4.5 (2): -5 ≤ b* ≤ 10

The invention discloses an accessory traceability management system and method for a watch movement, and relates to the technical field of product traceability management, and the method comprises the following steps: building an accessory traceability reflection management file, carrying out the structural recording of management data and carved code appearance features related to traceability collection, and storing the recorded data in a database; and based on the management data, an anti-radio frequency flash feature table for tracing acquisition risk assessment is generated. According to the invention, by establishing an accessory traceability reflection management file and an anti-radio frequency flash characteristic table, correlation identification of light source parameters and metal surface characteristics is realized, reflection interference is pre-judged in advance, and the acquisition rhythm is optimized; by misjudging a trigger point set to reconstruct an illumination and exposure mode and combining a reverse exposure dark window and a scattered light shadow to suppress mirror reflection, imaging is stable, carved codes are clear, and traceability identification accuracy and reliability are improved.

The invention relates to a high-precision coupling device and method for a photon integrated sensing module, the device comprises a rack, a PIC positioning unit, an FA coupling unit, an SLD coupling unit, a PD coupling unit, a dispensing illumination unit, a side vision assembly and a backlight source assembly, the top of the rack is provided with a developing plate, the middle part of the rack is provided with an upward shooting camera, and the middle part of the rack is provided with an upward shooting camera; the dispensing illumination unit comprises an automatic XYZ moving assembly, a dispensing support, an illumination support, a high-angle shooting camera, a laser, an optical adhesive dispensing assembly and a high-angle shooting UV lamp holder, the automatic XYZ moving assembly independently drives the dispensing support and the illumination support to move, the laser is arranged on the illumination support, the laser obliquely irradiates the upper surface of the photon integrated sensing module, and the optical adhesive dispensing assembly is arranged on the lower surface of the photon integrated sensing module. And reflected light of the laser irradiates the developing plate. The method comprises the steps of feeding, pre-positioning, FA pasting and SLD pasting. The parallelism of the adjacent coupling parts is detected by using an oblique laser specular reflection imaging method, so that the optical precision is improved, the method is simple, and the effect is remarkable.

The invention relates to the technical field of optical detection, and particularly provides a mirror surface detection method for a large-aperture spliced telescope, which comprises the following steps of: emitting light from a focus position by using a light source, reflecting the light through a mirror surface of the large-aperture spliced telescope to enter a discrete lens arranged at the rear end, and splitting the light by using a spectroscope to obtain a split light beam; the first light beam enters the camera to obtain interference fringes of the splicing seams, the second light beam enters the optical switch to carry out aperture coding, and the mirror surface precision of the large-aperture spliced telescope can be determined according to the code of each splicing seam and the confocal and co-phase information of the sub-reflectors on the two sides of the splicing seam. According to the invention, splicing seam detection is carried out through focus reverse auto-collimation, the problem that an oversized collimator is needed traditionally is avoided, point-by-point detection is carried out on the sub-reflectors according to the splicing seam, and confocal and co-phase detection of the adjacent sub-reflectors is realized according to interference fringes.

A graphics processor is provided that includes circuitry configured to generate auxiliary motion vectors for higher-order light-based effects such as shadows, objects reflecting in mirrors, waves in water or other liquids, glossy surfaces, or objects visible through transparent and / or refractive glass. The circuitry is configured to apply light path constraints to simplify the calculations used to generate the auxiliary motion vectors.