7339 results about "Facula" patented technology

The invention relates to the technical field of optical detection, in particular to a workpiece surface defect detection method and system based on the optical technology, and the method comprises the following steps: S1, generating a curvature model of a workpiece; s2, dynamically adjusting the irradiation angle and the light spot shape of a light source according to the curvature model in the S1; s3, adjusting the focal length of the detection equipment in real time; s4, imaging acquisition is carried out on the workpiece at the same time through multiple angles; s5, correcting image distortion caused by surface curvature change, and fusing the multi-angle images into a high-precision workpiece surface image; s6, defect features of the surface of the workpiece are extracted, defects are classified, positions are marked, and a defect detection report is generated; according to the invention, by dynamically adjusting the light source and the focal length and combining multi-view imaging and advanced image processing technologies, efficient and accurate defect detection is realized, and the product quality and the production efficiency are remarkably improved.

The invention provides a deep learning-based rapid ore sorting method under adaptive illumination intensity, and relates to the technical field of ore sorting, the deep learning-based rapid ore sorting method comprises the following steps: obtaining illumination intensity distribution information and ore three-dimensional point cloud data, and calculating ore space orientation parameters based on quaternion attitude estimation; inputting the obtained data into a layered illumination compensation network, and obtaining an illumination normalized enhanced image through adaptive brightness mapping and local light spot correction in combination with reflectivity recovery and non-local mean filtering; inputting the illumination normalized enhanced image and the ore three-dimensional point cloud data into a multi-branch feature extraction network, constructing feature high-order association, and adopting adaptive feature reconstruction and conditional random field optimization features; and inputting the reconstructed features into a classification model based on active learning, optimizing a feature manifold space by using a self-organizing mapping network, carrying out sample labeling in combination with active sampling of adaptive entropy threshold screening and uncertainty perception, and realizing ore classification and sorting through random forest integration.

The invention provides a microscope automatic focusing method and device and a computer readable storage medium, and the method comprises the steps: S1, capturing a laser reflection light spot image on a sample through a camera, so as to determine the focusing position of an objective lens; s2, integrating the light spots through threshold processing and morphological operation, analyzing the gradient of a longitudinal gray distribution map to determine the edge and orientation, and finally identifying the maximum contour and framing the maximum contour with a minimum bounding rectangle to determine the width of the light spots; and S3, according to the linear relation between the light spot width and the defocusing distance and by analyzing the semi-circle orientation and width change of the light spot, controlling the focusing motor to reach the focusing position. The distance and the direction between the objective lens and the focal plane are determined by acquiring the reflected light spot image of the laser irradiated on the sample through the microscope objective lens, and the focusing error caused by the nonlinearity of the spot size when the point-semicircle spot approaches the focal plane is avoided according to the linear relation between the spot width and the defocusing distance. And the focusing process is high in efficiency and precision.

The invention discloses a light spot real-time monitoring and feedback focusing system and method for laser processing. The system comprises a laser processing module, an emission light source module, a power monitoring module, a light spot monitoring module and an automatic control module. The emitting light source module is used for emitting laser beams; the power monitoring module is used for monitoring the laser power emitted by the emitting light source module; the light spot monitoring module is used for monitoring light spots of diffuse reflection light after the laser is emitted to the surface of the workpiece; the automatic control module sets reference signals of the following parameters: processing laser power and shape, position and size of a processing light spot; and according to the reference signal and the corresponding feedback signal, the laser emission parameter and the laser incident workpiece surface parameter are automatically adjusted, so that the error between the reference signal and the corresponding feedback signal is within a set precision range. According to the method, the light spot form and the light intensity in the machining process are dynamically monitored, and the light spot form and the energy in the laser machining process are adjusted in real time through feedback.

The invention relates to the technical field of optical detection, in particular to semiconductor detection equipment, which comprises a reinspection light source for emitting reinspection light, a bright field light source for emitting bright field light and a dark field light source for emitting dark field light, the reinspection light, the bright field light and the dark field light are respectively guided to irradiate the surface of a wafer, the reinspection light is reflected by the wafer to form reinspection signal light, and the reinspection signal light is transmitted to the light source. The bright-field light is reflected by the wafer to form bright-field signal light, and the dark-field light source is scattered by the wafer to form dark-field signal light; the optical separation element is used for collecting the bright-field signal light, the dark-field signal light and the reinspection signal light and performing spatial separation, so that the dark-field signal light, the bright-field signal light and the reinspection signal light are emitted to different transmission paths for respective imaging; wherein a dark field illumination light spot formed by the dark field light on the surface of the wafer, a bright field illumination light spot formed by the bright field light on the surface of the wafer and a reinspection illumination light spot formed by the reinspection light on the surface of the wafer do not coincide with one another. The wafer defect detection device is at least beneficial to improving the detection speed and the detection precision of wafer defect detection.

The invention discloses an improved underwater image enhancement method. The method comprises the following steps of lightweight downsampling and feature extraction; performing multi-stage attention enhancement and feature optimization; multi-path feature reconstruction is carried out; and performing multi-stage output fusion and image restoration. According to the method, a UNet + + model is introduced into the field of underwater image enhancement for the first time, standard convolution of a down-sampling layer is replaced by lightweight convolution, a three-stage attention mechanism of local noise suppression, space-channel collaborative optimization and global color cast compensation is cascaded after each layer of lightweight convolution, and a multi-level enhancement result is generated. And finally fusing and outputting through a weighted average strategy. And through lightweight convolution replacement, the model parameter quantity and the calculation complexity are remarkably reduced, and the calculation efficiency is improved. Through a three-stage attention mechanism, typical degradation problems of suspended particle noise, edge blur, color distortion and the like of the underwater image are accurately repaired. According to the method, the common artifact problems of light spots and the like and the excessive smoothness problem in the existing method are solved.

The invention relates to an aliasing image intelligent deformation small target identification algorithm based on detector multiplexing, and relates to the technical field of aliasing image target identification, and the algorithm comprises the steps: designing a detector multiplexing optical system; designing a view field coding element, and splicing the whole system; simulating and generating a motion track of the early warning target under the space-based background; the target motion trail is imaged through a detector multiplexing optical system; aliasing video simulation of moving target imaging is carried out; an intelligent deformation small target recognition algorithm is applied to the aliasing image, and a moving target is recognized; target resolution and field-of-view positioning are realized by using the relevance between the inter-frame track of the moving target and the light spot shape. According to the aliasing image intelligent deformation small target recognition algorithm based on detector multiplexing, light originally imaged on a large-area-array detector is folded and imaged on a small-area-array detector, and therefore the purpose that the small-area-array detector receives large-view-field imaging is achieved.

The invention discloses a multi-light-spot centroid extraction method and device based on an FPGA, a medium and a product, and relates to the field of digital image processing, and the method comprises the steps: firstly, caching image line data through a first-stage FIFO and a second-stage FIFO, forming three continuous groups of image line data streams, effectively solving the problems of data synchronization and processing rate matching, and improving the data processing efficiency; then, effective pixels of the light spots are accurately determined by means of a pixel threshold value, and different light spot areas are accurately divided by means of line continuity judgment and boundary marking, so that repeated recognition and error recognition of the light spots are avoided, and the accuracy of light spot recognition is greatly improved. And finally, according to the weighted average positions of the gray values of the effective pixels of all the light spots, the target centroid coordinates of the target light spots are calculated, the internal gray difference of the light spots is fully considered, and compared with a conventional method, the light spot energy distribution center is more accurately reflected, so that the calculation precision of the light spot centroid is remarkably improved.

The invention relates to a light path system for forming point ring light spots and a laser processing device. The light path system comprises a first light source, a first collimating lens, a first conical lens and a reflecting mirror which are arranged in the first linear direction. The second light source, the second collimating lens, the focusing lens and the second conical lens are arranged in the second linear direction, the reflecting mirror is located between the second collimating lens and the focusing lens, and the center of the reflecting mirror and the center of the second conical lens are each provided with a through hole allowing a second light beam emitted by the second light source to penetrate through; a first light beam emitted by the first light source passes through the first collimating lens and the first conical lens and then is reflected by the reflector, and the reflected first light beam sequentially passes through the focus lens and the second conical lens and then forms an annular light spot at the focus of the focus lens. A second light beam emitted by the second light source sequentially passes through the second collimating lens and the focus lens and then forms a point light spot located in the center of the annular light spot at the focus of the focus lens. The composite light spot of the center point light spot and the outer ring light spot can be formed, the structure is simple, and the manufacturing cost is low.

The invention discloses a method for analyzing mineral trace elements by utilizing a micro-Raman spectrum, which comprises the following steps of: fixing a mineral sample on a rotary sample table of a micro-Raman spectrometer, selecting an area to be detected by combining a micro-imaging technology, collecting a Raman background signal under the pre-illumination of low-power laser, and analyzing the trace elements in the area to be detected according to the Raman background signal. The laser focal length, the spot size and the incident angle are adjusted accordingly, the laser is focused on a target area, under the calibrated laser condition, through a multi-angle excitation micro-area, after an algorithm is applied to optimize signals, reduce impurity interference and integrate multi-angle Raman signals, the characteristic spectrum information of the microelements can be extracted, and the microelements can be accurately detected. High-resolution analysis of sample components is realized, and a three-dimensional distribution model of microelements in a microcell is constructed in combination with microscopic imaging data. The method has the characteristics of non-destructiveness, high resolution and rapid detection, and is suitable for mineral component analysis in the fields of geology, material science and the like.

The invention discloses a visual combined infrared precast beam appearance defect detection method, and relates to the technical field of civil engineering structure detection and nondestructive testing, and the method comprises the following steps: establishing an illumination time sequence observation layer, collecting multi-dimensional optical parameters aiming at the surface of a precast beam, and generating a dynamic reflection fingerprint baseline; and performing coherent phase decomposition based on the dynamic reflection fingerprint baseline, separating the specular reflection signal from the material texture signal, and calibrating light spot track and intensity evolution data in the unified baseline. According to the method, an illumination time sequence observation layer is constructed to generate reflection fingerprints, coherent phase decomposition and anti-fact playback are combined, reflection interference is stripped, and crack boundaries are recovered; time coordinates are reconstructed through double-mirror-image anchor points, and crack evolution is accurately recovered; phase conjugate projection and light field traction are combined, a dynamic threshold optical fence is established, the exposure rhythm is controlled in a closed-loop mode, and precise detection of the defects of the precast beam is achieved.

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 an optical element surface measuring device and method. The device comprises a light source module, a motion table, a laser energy monitoring module, a photoelectric detection module, a space triangular focus positioning module, a projection module, a binocular vision module and a processing module. According to the technical scheme, the laser energy monitoring module records laser pulse energy in real time, the photoelectric detection module accurately measures the radius of a focusing light spot, the space triangular focus positioning module accurately positions the focus position, and the projection module projects interference fringes of a periodic structure to the surface of the optical element to be measured. The binocular vision module is used for capturing interference fringe changes, and micro-deformation or damage is judged by combining a phase shift and unwrapping algorithm, so that three-dimensional reconstruction of the micro-deformation and damage morphology of the surface of the optical element is realized. The real-time online measurement of the micro-deformation and the damage threshold of the optical element is realized, and the damage threshold evaluation process is optimized. The method has the advantages of high precision, high real-time performance, high automation degree, wide application range and the like.

The invention discloses a carbon-coated foil coating uniformity detection method and system based on machine vision, and the method comprises the steps: S1, collecting blue light, green light, red light and near infrared spectrum images of the surface of a carbon-coated foil coating through a multi-angle camera, and generating a fused composite image through a multispectral image fusion algorithm; s2, performing adaptive histogram equalization and reflected light spot suppression processing on the fused composite image, and outputting an enhanced image; s3, coating edge features in the enhanced image are extracted, segmentation of a coating region is realized in combination with a region growing method, and a coating region mask is obtained; s4, extracting multi-scale texture features of the coating region by adopting a pre-trained ResNet-50 deep convolutional network, and constructing a coating surface feature vector; and S5, based on the extracted feature vectors and a standard template library, through a uniformity evaluation model, calculating a uniformity index of the coating, and detecting the uniformity of the coating. According to the invention, accurate detection of the coating uniformity can be realized.

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 a quick alignment method for optical coupling equipment, which comprises the following steps of: acquiring real-time position information of a laser transmitting end and a laser receiving end, acquiring relative position data by adopting a fiber grating technology, setting a dynamic compensation algorithm according to a light spot offset and a position deviation value, generating an adjustment parameter through the dynamic compensation algorithm, and aligning the adjustment parameter to the optical coupling equipment. According to the method, the structural design of optical coupling equipment is optimized, a high-precision light spot imaging module and a fiber grating positioning module are integrated, and a multi-point data fusion technology and an optical path alignment model in a dynamic environment are utilized, so that the measurement precision is further improved, and the influence of environmental interference is reduced. According to the invention, the problems of real-time performance and accuracy of light path alignment in kilometer-level laser measurement are effectively solved, and a new solution is provided for the development of a long-distance laser measurement technology.

The invention discloses an insulator pollution detection method and system based on multispectral fusion, and belongs to the technical field of spectral detection. The method comprises the following steps: firstly, reconstructing a three-dimensional geometric model of a target insulator through a binocular vision method, and calculating the surface area of the target insulator according to the three-dimensional geometric model; the abnormal area of the target insulator is extracted, the optimal detection line is determined according to the three-dimensional coordinate of the central point of the abnormal area, the optimal detection equipment is selected according to the optimal detection line, the workload of multidirectional observation is reduced, and the working efficiency is improved. Second high-frequency spectral images are obtained according to the optimal detection equipment, discharge light spots of the multiple second spectral images are fused to generate a light spot contour and a light spot pixel variance, and the relative discharge position and the actual discharge area are calculated according to the light spot contour; and predicting pollution data of the insulator according to the surface area, the light spot pixel variance, the relative discharge position and the actual discharge area.

The invention provides an ultrafast laser welding method and device for large-spacing heterogeneous materials. The ultrafast laser welding method specifically comprises the steps that a lower workpiece and an upper workpiece are stacked and clamped through a clamp; a laser beam is collimated, then enters a scanning galvanometer and is focused through a field lens after being emitted, first scanning laser energy is absorbed by a lower-layer material to generate plasma, the plasma continuously expands and overflows, meanwhile, the lower-layer material is melted to fill a gap, and the quasi-optical contact condition is achieved; free expansion of plasmas in second scanning is effectively inhibited, laser energy is limited near a welding seam, the melting volume of the area is remarkably increased, and the welding strength is remarkably improved; and the third scanning and the second scanning are consistent in mechanism, the material melting amount is increased, and finally welding head strengthening is achieved. Through the scanning galvanometer and the field lens, a focusing light spot moves along a specified route in the contact surface of the upper and lower workpieces, so that the workpieces are melted and combined. After three times of scanning, the large-spacing heterogeneous material can finally obtain a high-strength and high-quality welding joint.

A system for three-dimensional spatial perception underwater that includes a primary submersible vehicle. Frontward facing projectors are used to scan beams of light across a selected field of underwater view. Further, event cameras with pixels triggered by events are used to detect corresponding spots of the scanned beams that are reflected from underwater objects or surfaces. Circuitry is configured to determine positions of the objects based on the pixels that are triggered. Additionally, pilot submersible vehicles the projectors and event cameras are tethered to the primary submersible vehicle to provide extend detection of spots corresponding to reflections from underwater objects or surfaces.

The invention discloses a quality management control method and system based on a cosmetic production process, and relates to the technical field of cosmetic quality management.The method comprises the following steps that firstly, a conveying belt conveys a product to a detection area at a preset speed, and a visual detection system captures a high-definition image at a product sealing position through an industrial camera; establishing an ordered and searchable image data set for the captured image data, and extracting key features reflecting abnormal sealing of the product from the data set; and the extracted key features are further analyzed and processed under a detection window. According to the method, the deep learning model is introduced to intelligently evaluate the sealing light spot and heat distribution, the sealing abnormality coefficient is generated, pollution and defects are accurately distinguished, the misjudgment rate is reduced, and resource waste is reduced. Features are classified in real time, the conveying speed is dynamically adjusted, detection accuracy and production efficiency are both considered, system overload is avoided, and efficient intelligent quality control is provided for cosmetic production.

The invention relates to a light spot uniformity optimization method and system for a high-precision VCSEL device, and the method comprises the following steps: carrying out the light field collection of a light-emitting surface of the VCSEL device, obtaining the intensity distribution of original light spots, analyzing the non-uniformity of each light-emitting unit, and extracting the non-uniformity characteristics of the light spots. And carrying out deviation cause analysis based on the characteristics, and identifying device structure deviation parameters. According to the method, an etching process is optimized, a corrected oxidized aperture configuration scheme is obtained, near-field light field simulation is carried out by adopting a finite difference time domain method, and optimized light field distribution is verified and predicted. And finally, adaptive compensation design is carried out on the Bragg reflector structure based on a prediction result, light field regulation and control are realized, target light spot uniformity distribution is finally obtained, and the problem that systematic analysis and feedback control on non-uniformity causes of a light emitting unit layer in a device are lacked in the prior art is solved. And local bright spots or dark areas are caused.

The invention discloses a dimming method of a multifunctional mining lamp and related equipment. The method comprises the following steps: obtaining original illumination data and generating a panoramic illumination distribution diagram by sequentially lightening and controlling LEDs; performing polar coordinate system conversion and partition extraction on the illumination distribution diagram to obtain light spot deformation characteristics and brightness fluctuation characteristics, and calculating illumination transition continuity parameters; calculating an LED influence degree weight value according to a time sequence change rule of the feature data, and performing partition clustering; calculating a compensation parameter based on the initial parameter of the LED in each partition and generating a compensation sequence; and carrying out grading adjustment and dynamic correction on the LED according to the compensation sequence. According to the technical scheme, the mapping relation between the magnetic field interference and the LED luminous intensity fluctuation is established by analyzing the light spot distribution characteristics of the working plane, the spatial distribution characteristics of the annular LED array are combined, the partition dynamic compensation strategy is adopted, the problem of uneven illumination of the LED mining lamp in the high-intensity magnetic field environment is effectively solved, and the working efficiency is improved. And the lighting effect and the monitoring quality of an industrial site are improved.

Methods and apparatus for modulating a multi-mode shaped beam in powder bed additive manufacturing are provided. The method comprises the following steps: analyzing a geometric model of a component to obtain a plurality of feature regions which comprise at least one part of the component and correspond to different structure types; according to the structure type and in combination with material attributes and / or process targets, distributing corresponding light beam modes for the plurality of feature regions, wherein the light beam modes are modulated to have different light intensity distributions and / or phases; the light beam mode is applied to a light beam, so that the light beam is switched to the light beam mode corresponding to the light beam mode when the light beam scans a plurality of feature areas on a powder bed, matched light spot regulation and control are carried out on different feature areas in the additive manufacturing process, and therefore different forming requirements of various structure types are met in the same component at the same time.

The invention discloses a 7-series aluminum alloy composite light source laser welding method, which is characterized in that stitch welding is carried out on double-layer 7-series aluminum alloy test pieces by using a composite light beam formed by a near-infrared laser beam and a blue laser beam, the thickness of the upper-layer 7-series aluminum alloy test piece is 1-2mm, and the thickness of the lower-layer 7-series aluminum alloy test piece is 2mm; before welding, removing an oxide layer on the surface of the aluminum alloy, then pressing up and down through a jig, and setting welding parameters and paths; during welding, light spots of a near-infrared laser beam and a blue laser beam are concentric and emitted at the same time, the two laser beams are coupled and focused to a swing welding head, and stitch welding is carried out according to set welding parameters and paths; the light spot diameter of the blue light laser beam is larger than that of the near-infrared laser beam. Near-infrared light and blue light form coaxial composite light spots and emit light at the same time, stitch welding is conducted on the double-layer aluminum alloy test piece in combination with the swing welding head, and the stitch welding device has the advantages of being high in welding efficiency, good in air hole state and few in splashing and cracks.

The invention discloses a PCB (printed circuit board) hard board drilling process method, which is characterized in that two lasers with different wavelengths are used for processing a PCB hard board blind hole, one light source adopts picosecond ultraviolet laser, and the other light source adopts CO2 laser; according to the method, by means of the characteristics that picosecond ultraviolet laser has high absorptivity and small focusing light spots on metal materials such as bright copper, high-precision, high-quality and low-heat-influence windowing operation is carried out on the surface of the bright copper, and small blind holes smaller than micrometers are formed; by utilizing the characteristics that CO2 laser has high absorptivity and large focusing light spots on non-metallic materials such as glass fibers, high-efficiency, high-reliability and no-damage bottom copper degumming operation is carried out in a round window after windowing, and a deep blind hole with the depth larger than 0.5 mm is realized.

The invention provides an adjustment method of detection equipment, and the detection equipment sequentially comprises an objective lens, a spectroscope, a barrel lens and a detector from an object space to an image space, and also comprises a Kohler illumination module. The illumination light beam is emitted from the Kohler illumination module and is transmitted to the objective lens through the spectroscope, when the object to be detected is arranged on one side, far away from the spectroscope, of the objective lens, the illumination light beam emitted from the objective lens is reflected to obtain a reflected light beam, and the reflected light beam sequentially passes through the objective lens, the spectroscope and the barrel lens to reach the detector. After an aperture diaphragm is inserted into the Kohler illumination module and an auxiliary lens is arranged between the barrel lens and the detector, obtaining a first light spot position of a light spot formed by the aperture diaphragm at an entrance pupil of the objective lens through the detector; and under the condition that the Kohler illumination module does not provide the illumination light beam and the light source is used as an object to be detected, acquiring a second light spot position of the light spot of the entrance pupil of the objective lens through the detector, adjusting the position of the aperture diaphragm according to the first light spot position and the second light spot position, and aligning the illumination optical axis and the imaging optical axis.

The invention provides an inter-satellite laser communication rapid capturing method, and relates to the technical field of laser communication, and the method comprises the steps: determining the estimation space orientation of a satellite antenna based on the satellite parameters of a target satellite, and carrying out the scanning according to a target scanning strategy, and obtaining a scanning light spot result; performing pointing correction based on the light spot scanning result, and establishing a target communication link; and monitoring the data communication process of the target satellite based on the target communication link in real time, and performing corresponding adjustment when communication danger exists. Determining an estimated space direction of a satellite antenna based on satellite parameters of a target satellite; performing pointing correction based on a light spot scanning result and then establishing a communication link; the communication process of the satellites based on the communication link is monitored in real time, and a response is made when the communication process is found to be abnormal, so that the communication stability and reliability between the satellites are effectively enhanced.

The invention relates to a related light measuring device based on a bevel mirror and a control method, and solves the problem that the existing three-dimensional detection technology is insufficient in comprehensive adaptability and cannot meet the requirements of precision detection for stability, precision and data collaboration, and the related light measuring device comprises a laser emission head, a double-bevel mirror, a light path receiving module, a zoom camera and a circuit processing unit. The first bevel mirror is provided with a through hole for laser to directly irradiate a target; the light path receiving module receives and reflects the laser-to-electric signal; the second bevel mirror reflects the target and the light spot light to the camera to obtain visual information; and the circuit processing unit controls all the components, integrates laser and visual information, and realizes three-dimensional detection of the target. The method has the following effects: through the light path collaborative design of the double-bevel mirror, precise and synchronous acquisition of laser ranging signals and visual contour / light spot information is realized, so that high-precision three-dimensional detection of the distance, the flatness and the segment difference of a target object is efficiently completed.

The invention discloses a laser spot array detection method and system for structured light parameter calibration, and the method comprises the steps: capturing a laser array spot image on a laser calibration plane through a structured light camera, and carrying out the distortion correction processing and image filtering; extracting a red channel image, performing full-image adaptive threshold segmentation, corrosion and expansion operations, and screening Gaussian centroid coordinates and corresponding channels of candidate regions according to region areas; calculating the position of a peak value according to the position relation and the energy distribution condition of the candidate points, positioning the position of the light spot array, and generating a theoretical light spot array; calculating an actual light spot position by utilizing projective transformation and complementing missing light spots, carrying out secondary positioning correction on a light spot array by utilizing a seed point segmentation algorithm, and iteratively carrying out projective transformation to correct light spot deviation to obtain a sub-pixel-level light spot position; according to the invention, light spot sub-pixel position detection in structured light parameter calibration is realized, the difficulty of structured light camera pipeline calibration is reduced, and the reliability and robustness are improved.

The invention provides a physiological function monitoring method and system based on multiband laser, a terminal and a medium, and particularly relates to the technical field of optical and physiological monitoring, and the scheme comprises the following steps: based on a preset space-time mapping model, using a camera to collect an out-of-focus speckle image sequence of a target monitoring object under the irradiation of two laser lamps within a preset time period; and based on the out-of-focus speckle image sequence, obtaining a vibration signal of the target monitoring object corresponding to the laser of each wave band so as to obtain a target physiological parameter monitoring value. According to the scheme, the multi-spectrum and out-of-focus speckle imaging technology is combined, non-contact precise tracing of the motion of the target monitoring object is achieved through the space-time coupling of the dual-band light spot flow caused by the single-point motion of the target monitoring object, the precision of the target physiological parameter monitoring value calculated based on the vibration signal is improved, and the accuracy of the target physiological parameter monitoring value is improved. And meanwhile, the tracing flexibility is improved, and the robustness of the monitoring model is effectively enhanced.