2387 results about "Light reflection" patented technology

The invention discloses a weldment welding seam automatic detection method and device based on machine vision, and relates to the technical field of machine vision intelligent detection. The weldment welding seam automatic detection method and device based on machine vision comprises the steps that S1, surface images and forming feature data of a weldment are collected and preprocessed to construct a standardized image feature data set; s2, the boundary clearness of the weld joint is evaluated by combining the edge strength and the contour coherence, and the main contour extraction range is dynamically adjusted; s3, analyzing abnormal focusing characteristics of the candidate area, and adjusting a defect labeling range and a detection priority; and S4, integrating the boundary definition and the abnormal focusing features, analyzing the structure abnormality, and dynamically controlling and verifying a resource allocation strategy. The problems that in the weldment detection process, obvious light reflection and texture blurring phenomena exist in a heat affected area at a weld joint, a traditional image enhancement and edge extraction algorithm is difficult to stably recognize microdefects, and the credibility of a detection result is reduced are solved.

The invention relates to the technical field of image analysis, in particular to a cushion foaming forming quality detection method and system based on machine vision, and the method comprises the steps: collecting image data, carrying out the iterative screening of the image data, and selecting a detection sample; the method comprises the following steps: collecting a three-dimensional point cloud of a detection sample, calculating the flatness of a seat cushion by using the three-dimensional point cloud, carrying out modeling by using polarized light reflection to obtain surface cell uniformity, and carrying out feature extraction on the three-dimensional point cloud through a three-dimensional mapping model to generate a three-dimensional semantic model; extracting mechanical characteristics by using the time sequence pressure map, and generating a cushion digital model; variational self-coding is carried out on the cushion digital model, and an abnormal feature map is generated; performing information extraction and pixel-by-pixel multiplication on the abnormal feature map by using a learnable convolutional layer to generate an abnormal enhanced map; and inputting the abnormal enhancement graph and the seat cushion digital model into a multi-channel network model for final evaluation. According to the method, the image data is analyzed, and the performance of the cushion is subjected to index quantification, so that the deep detection of the quality of the cushion is realized.

The invention discloses a control method of a video monitoring system, which relates to the technical field of video monitoring, and comprises the following steps of: acquiring continuous image frames through the video monitoring system, extracting brightness channels, edge structures, direction gradients and contrast changes of images, constructing a reflective perception vector group, and calculating an included angle change trend by combining a target motion direction vector, determining whether a reflection offset condition consistent with the target direction appears in a picture in a camera attitude control process; after it is determined that the reflection offset condition consistent with the target direction appears in the picture, the inter-frame change tensor of the target area and the reflection area is extracted, and a time sequence track consistency matrix is constructed; according to the invention, the problem of wrong adjustment of the camera caused by misjudgment of light reflection in video monitoring is solved, attitude regulation and control based on image displacement abnormal mode recognition are realized, and the tracking stability and the monitoring accuracy are improved.

The invention relates to the technical field of optical imaging, and discloses a periscopic camera module which comprises a base internally provided with an installation cavity, an anti-shake motor installed on the base, a lens installed on the anti-shake motor and facing the installation cavity, an imaging assembly installed on the base and a steering optical element. The base is provided with a movable part capable of moving relative to the lens, the movable part is fixed through a locking part, and the steering optical element is installed on the movable part. According to the steering optical element, the movable part and the locking part are movably arranged on the base, so that the position of the movable part can still be adjusted after the lens, the anti-shake motor and the like are installed, the light reflection effect of the steering optical element can be optimal through adjustment, then the movable part is fixed through the locking part, and sealing in the installation cavity is guaranteed; therefore, the imaging quality is improved and the influence caused by errors is reduced.

The invention provides a flue-cured tobacco leaf image distortion correction enhancement method, and belongs to the technical field of flue-cured tobaccos. Distortion segmentation point detection is carried out on an obtained flue-cured tobacco leaf image, and an illumination change area caused by unevenness of a tobacco leaf surface is identified by using an illumination homogenization algorithm based on a Poisson equation; secondly, constructing a distortion jump point matrix to mark gray abrupt change positions caused by shadows and light reflection between adjacent areas, then decomposing and reconstructing multi-scale image features by adopting a Laplacian pyramid image fusion algorithm, and eliminating optical interference generated by surface fluctuation through a designed fusion rule; and finishing processing when the accuracy reaches a set range, otherwise, carrying out correction and optimization again, thereby solving the technical problem that the image quality and the subsequent analysis accuracy are influenced by shadow and light reflection generated during image acquisition due to unevenness of the tobacco leaves in the prior art.

A system, apparatus and method directed to detecting malposition of a medical device within a vessel of a patient, such as an Azygos vein. The medical device can include a multi-core optical fiber including a plurality of core fibers, where each of the plurality of core fibers includes a plurality of sensors is configured to reflect a light signal based on received incident light, and change a characteristic of the reflected light signal for use in determining a physical state of the multi-core optical fiber. The system can include a console having non-transitory computer-readable medium storing logic that, when executed, causes operations of providing a broadband incident light signal to the multi-core optical fiber, receiving reflected light signals, processing the reflected light signals, and determining whether the medical device has entered the Azygos vein of the patient based on the reflected light signals.

The invention discloses a method and system for processing a circular weld joint based on point cloud data, and belongs to the technical field of machine identification of weld joints, and the method comprises the following steps: collecting the point cloud data of the surface of a workpiece through a visual sensor; preprocessing the collected point cloud data; calculating a normal vector of each point in the point cloud data; segmenting the workpiece surface point cloud and the reflective interference points based on a normal vector, and filtering the interference points deviating from a preset range in the normal direction to obtain a target point cloud and a reference point cloud; projecting the target point cloud to a reference plane obtained by fitting the reference point cloud, generating a target projection point cloud, detecting boundary points of the target projection point cloud, screening candidate weld joints based on distance distribution from the boundary points to the center of mass, and extracting weld information. According to the method, the workpiece made of the material with high light reflection is treated, the finally obtained result can still keep good precision, and the quality of the workpiece is improved.

The invention discloses an automobile part stamping forming defect detection method based on machine vision, and relates to the technical field of automobile part stamping forming, and the method comprises the following steps: calculating the brightness gradient distribution and the structure direction difference of a corner region in an automobile part stamping forming image, generating a corner reflection index, and calculating the brightness gradient distribution and the structure direction difference of the corner region; according to the corner reflection index, determining an area containing the image ghosting generated by corner reflection in the image for identifying whether the image ghosting generated by corner reflection occurs or not; edge line segments are extracted in the area, containing the image ghosting generated by corner reflection, in the image, and edge repetition feature vectors are generated based on the direction consistency and the structure repetition degree of the edge line segments and used for determining edge repetition features under the condition that the image ghosting is generated by corner reflection. According to the method, the problem of image ghosting misjudgment cracks caused by corner light reflection in the automobile part stamping forming process is solved, and high-precision recognition and classification of real crack defects are achieved.

The invention discloses a flight laser marking system and a flight laser marking method, and relates to the technical field of laser marking. The flying laser marking system comprises a feeding mechanism, a conveying mechanism, a marking visual positioning module, a laser marking machine, a visual detecting and positioning module, a defective product removing mechanism, a discharging mechanism, a sensing module and a main control and data processing system. The conveying mechanism comprises a product bearing belt and a synchronous belt. The sensing module comprises an encoder and a light reflection sensor. And the product supporting belt adopts a longitudinal groove array structure or a single / multiple transverse groove structure. The method comprises the steps of feeding control, visual positioning before marking, Y-axis coordinate calibration compensation, visual quality detection after marking, defective product removal, discharging control and the like. Continuous and full-automatic production is achieved, the production efficiency is greatly improved compared with static marking, meanwhile, the marking precision is guaranteed through the visual positioning and compensation technology, and online product quality control and defective product removal are achieved.

A photonic system includes an optical coupling interface for an optical fiber disposed on a first surface of a support material and a PIC die / chip disposed on a second surface of the support material that is opposite from the first surface of the support material. The PIC die / chip includes an oxide stack, where a portion of the oxide stack is configured as an optical reflector structure that includes a reflecting surface configured to direct a light beam conveyed from an optical waveguide within the PIC die / chip from a first direction of travel to a second direction of travel directed toward the second surface of the support material and toward the optical coupling interface for the optical fiber disposed on the first surface of the support material. The light beam travels through the optical reflector structure and through the support material to reach the optical coupling interface for the optical fiber.

This invention relates to a Bragg light generation system and method suitable for Bragg-type atomic interferometers. The system includes: a laser for generating a first laser beam with a frequency in a preset atomic absorption peak band; an optical circulator for propagating the first laser beam to a cascaded acousto-optic modulator and receiving two third laser beams returned from the cascaded acousto-optic modulator; a cascaded acousto-optic modulator for diffracting the first laser beam into two second laser beams with opposite propagation directions through Bragg diffraction of two acousto-optic crystals; an optical assembly for performing secondary diffraction on the two second laser beams and reflecting the two mutually perpendicular second laser beams to the cascaded acousto-optic modulator; and an output module for splitting and sampling the two third laser beams and modulating the sampled third laser beams into Bragg laser beams in the target frequency band. This invention reduces the path separation of the two Bragg laser beams by using a quasi-common optical path, thereby reducing phase noise and improving measurement accuracy.

The invention discloses a light attenuation assembly, an optical module, an optical device and related equipment. The light attenuation assembly comprises a half-wave plate, a first polarization beam splitter and a second polarization beam splitter which are sequentially arranged along a light path. The half-wave plate is used for converting the first linearly polarized light into second linearly polarized light, and the second linearly polarized light can be decomposed into third linearly polarized light and fourth linearly polarized light of which the polarization directions are perpendicular to each other; the first polarization beam splitter is used for dividing incident second linearly polarized light into third linearly polarized light and fourth linearly polarized light, reflecting the third linearly polarized light to the second polarization beam splitter, and transmitting and filtering the fourth linearly polarized light at the same time; and the second polarization beam splitter is used for reflecting and outputting the third linearly polarized light and transmitting and filtering the residual fourth linearly polarized light. Through the light attenuation assembly, the quality of the output laser beam can be improved.

Embodiments of the present disclosure provide a passive optical network (PON) coexistence method and apparatus. The method comprises: at a same moment, controlling one of a 50G PON downlink signal and an EPON & 10G EPON uplink optical signal to be transmitted in a PON optical path, wherein the 50G PON downlink signal comprises a 50G PON downlink optical signal and / or a 50G PON downlink optical reflection signal, and the EPON & 10G EPON uplink optical signal comprises an EPON uplink optical signal and / or a 10G EPON uplink optical signal.

An optoelectronic device is used with an optical fiber for data transmission and has a transmitter mounted on a printed circuit board (PCB) to emit light. A collimation lens on a lens block receives the light incident thereto. A microstructure on a reflective surface of the lens block has sections that reflect the light into attenuated portions. A focusing lens on the lens block focuses a first attenuated portion from first sections of the reflective surface to the optical fiber. Meanwhile, second sections of the reflective surface reflect a second attenuated portion to another reflective surface on the lens block. The second attenuated portion passes out of a refractive surface on the lens block to an receiver, which is mounted on the PCB adjacent the transmitter. The second attenuated portion of the light can be used to monitor the optical output of the transmitter.

The invention relates to the technical field of image processing, and particularly discloses a strong reflective weld image anti-interference enhancement system and method and a medium. The system comprises an image acquisition module, a physical reflection characteristic analysis module, a self-adaptive illumination component separation module, a characteristic retention type light reflection suppression module and an image fusion output module, and by analyzing the reflection characteristics of the surface of a welding seam, separating an illumination layer from a reflection layer, implementing gradient-guided brightness compression and edge enhancement, and performing dynamic weight fusion, the image fusion output module is used for performing image fusion. And strong reflection inhibition and weld seam detail enhancement are realized. According to the invention, the image quality and robustness of weld defect detection can be improved.

The invention discloses an offshore wind power pile foundation scouring pit form monitoring system and method. The system comprises an optical sensor array arranged along the circumference of a pile foundation, a sonar scanning module arranged on the incident flow side and a data processing module in communication connection with the optical sensor array and the sonar scanning module. The light sensor array is annularly distributed along the circumference of a pile foundation by 360 degrees, the incident flow side sonar scanning module is combined with the multi-source sensing framework, light sensors cover a scouring sensitive area which is 1-2 times of the designed scouring depth below an original seabed surface and is 2 m above the seabed surface, and narrow-spectrum red light sensors focus accumulation subareas which are 0.5 m to 3 m above the seabed surface; and dynamically dividing the scouring area and the accumulation area through the partition unit and activating the corresponding sensor group. Exposure time sequence data of a scouring area and red light reflection data of an accumulation area are collected in a targeted mode, meanwhile, incident flow side section data scanned by sonar are combined, and complete coverage of the shape of a scouring pit around a pile foundation is achieved from the spatial dimension.

The invention relates to the technical field of industrial visual inspection and intelligent manufacturing, and discloses a complex tooth surface structure-oriented bevel gear surface video defect detection method, which comprises a video data acquisition and preprocessing step, a video time sequence modeling branch construction step, a super-image space expression branch construction step and a double-branch fusion prediction step. And a reasoning and detection output step. According to the invention, for the bevel gear tooth surface with complex curvature, strong light reflection and tiny defect characteristics, a two-way detection architecture in which a video time sequence modeling branch and a super-image space expression branch are fused is constructed; cross-frame dynamic defect features are captured by using a video transformer network based on a sliding window, and local space texture perception is enhanced through super-image stitching and a pre-training network, so that stable and accurate identification of micro defects and cross-frame evolution defects is realized under the background of complex tooth surface reflection and structure interference; and the method has relatively high detection robustness and comprehensive performance.

The invention relates to the technical field of unmanned aerial vehicle photovoltaic frame cleaning, and discloses a combined blowing and spraying photovoltaic panel cleaning system carried on an unmanned aerial vehicle, which comprises an undercarriage, a water tank and a plurality of sensors arranged on the undercarriage, and a pressurization system connected with the undercarriage, the composite blowing and spraying subsystem is arranged on the undercarriage; the pipeline system is used for water flow transportation and is arranged on the undercarriage; the combined blowing and spraying subsystem comprises a spraying system support fixedly installed on the undercarriage, a spraying turret movably arranged on the triangular support and a monitoring camera arranged on the spraying turret, wherein the spraying system support extends in the direction away from the undercarriage and forms a triangular support. The initial positioning coordinates are corrected by presetting the light reflection judgment threshold value and the water mist judgment threshold value in combination with the current temperature and the vertical distance of the photovoltaic panel, so that the unmanned aerial vehicle is prevented from swinging and shifting, and the risk of collision with the photovoltaic panel is reduced.

The utility model relates to the technical field of optical devices, in particular to a multimode short-distance optical device, which comprises a circuit board, a light emitting element, a light receiving element, a cushion block, a thermoelectric refrigerating unit and an optical lens. The light emitting element and the light receiving element are both arranged on the cold face of the thermoelectric refrigerating unit, the light emitting element is a vertical cavity surface emitting laser, and the optical lens is arranged on the emergent light path of the light emitting element and the incident light path of the light receiving element. And the reflector is used for reflecting and focusing the emitted light of the light emitting element into the multimode optical fiber and reflecting and focusing the incident light of the multimode optical fiber into the light receiving element. According to the utility model, a flexible assembly form is provided, the temperature of the heating element can be effectively controlled, and the problems of low efficiency and low precision in the aging process are solved; in addition, by arranging the light paths on the same stable structure, stable support is provided for the light paths, and the stability of the light paths is improved.

The invention belongs to the technical field of image processing, and particularly relates to a motor assembly defect detection system based on image recognition, which comprises a highlight area segmentation module, a multi-scale highlight repair module, a reflectivity decomposition module and a defect detection module, and is characterized in that a stator magnetic steel potting image is acquired, a highlight area is segmented, and a highlight mask is obtained; constructing a multi-scale pyramid based on the brightness component and the saturation component of the stator magnetic steel potting image, and generating a mixed weight map according to the highlight intensity and the detail significance under each scale; according to the multi-scale pyramid, the mixed weight map and the highlight mask, carrying out layered restoration on the brightness component to obtain a synthetic substrate image, and according to the synthetic substrate image, carrying out guided filtering and reflectivity decomposition to obtain an inherent reflectivity map; and carrying out encapsulation defect detection according to the inherent reflectivity graph. According to the invention, the interference of highlight reflection on encapsulation defect detection is eliminated, and the accuracy and robustness of encapsulation defect detection are improved.

The utility model discloses a visual pupil pen, which belongs to the technical field of medical pupil observation equipment, and comprises a first shell, a second shell is arranged at the front end of the rear side of the first shell, inner cavities are formed in the first shell and the second shell, and a threaded groove is formed in the front end of the inner wall of the second shell. A storage battery is installed at the rear end of the interior of the inner cavity, a charging interface is formed in the right end of the outer wall of the first shell, an illuminating lamp is installed in the middle of the front end of the outer wall of the illuminating cylinder, and a camera is installed on the right side of the front end of the outer wall of the illuminating cylinder. The two control switches can be used for controlling the lighting lamp and the camera to be turned on and turned off respectively, so that the pupil sizes of a patient before and after being irradiated by the light source can be recorded and compared in real time in cooperation with the measurement display screen, the light reflection condition of the patient is judged, medical staff can conveniently observe and judge the patient, and the result accuracy is improved.

A photonic integrated circuit device includes a lasing cavity for resonating at a plurality of discrete wavelengths and an optical feedback cavity operably coupled to the lasing cavity via a front surface of the lasing cavity. The optical feedback cavity has a reflective element for reflecting light, at least partially, back into the lasing cavity to form a resonant Fabry-Perot cavity between the front surface and the reflective element. The optical feedback cavity includes a variable phase shifting element adapted for receiving an input signal to control a phase shift of light propagating in the optical feedback cavity. The amount of light entering the lasing cavity from the optical feedback cavity is low enough to avoid dynamic instability of the lasing cavity. The reduction in light is obtained using an attenuator.

The invention relates to the technical field of manufacturing of electronic components, and discloses an LCM (liquid crystal module) backlight FPC (flexible printed circuit) micro-deformation prevention method, which comprises the following specific steps: S1, implementing large-area copper laying design on an element surface of a flexible printed circuit board, and covering a main area of the element surface with uniformly distributed copper foils to form a continuous conductive layer with consistent thickness, while the conductive layer bears electrical connection of the LED light source, the surface reflection characteristic of the conductive layer is optimized, and the phenomenon of uneven light reflection caused by surface fluctuation is reduced. Through the large-area copper laying design of the element surface and the S-shaped isolation interval layout, thermal stress is effectively guided to be symmetrically distributed in multiple directions and offset each other, plane micro-deformation of the FPC under thermal circulation is remarkably restrained, the deformation quantity is controlled within 50 micrometers, the problems of stress concentration and deformation amplification caused by linear intervals in the prior art are solved, and the reliability of the FPC is improved. And long-term stability and optical performance of the backlight module are ensured.

The invention discloses a printed pattern edge sharpening processing control and hardware imaging optimization system, and relates to the technical field of printed pattern imaging processing, and the system comprises a fragile feature pre-analysis module which recognizes the boundary of a fine line and a high saturation color block, and generates a feature map; the ambient light acquisition module obtains illumination parameters and positions a strong light reflection area; the structured light compensation imaging module projects adaptive structured light to optimize imaging; the texture layering module divides and marks image layers; and the layered sharpening module carries out differentiated sharpening on each image layer according to the ambient light parameters and outputs a high-quality image. According to the method, the fragile characteristics of the printing are accurately identified, and imaging optimization is carried out in combination with ambient light changes, so that edge sharpening and imaging quality collaborative improvement are realized; based on feature analysis and light parameter acquisition, an imaging strategy adaptive to a scene is constructed, layered differentiation sharpening is performed, accurate reduction of patterns is guaranteed, and high-precision printing detection and display requirements are met.

The invention relates to the technical field of optical image processing, and discloses a global perception and multi-branch heterogeneous attention polarization image fusion method and system, and the method comprises the following steps: obtaining polarization images of four angles, and obtaining a data set containing an intensity image and a linear polarization degree image according to a Stokes vector synthesis method; constructing a global perception and multi-branch heterogeneous polarization image fusion model, and performing training by using the data sets of the corresponding intensity image and the linear polarization degree image to obtain a polarization image fusion model; polarization image fusion is realized by using the polarization image fusion model; according to the invention, while polarization image fusion is accurately realized, perception of polarization features is significantly enhanced, and image details are effectively maintained; meanwhile, by improving the contrast ratio and the brightness of the image, the fused image is clearer and richer in details; in complex scene processing, object edge features and fine light reflection information can be better reserved, and the problem of detail loss in the prior art is effectively improved.

The invention discloses a multi-modal drainage wire clamp pose estimation method, system and device based on cross-modal contrast learning and a medium, and belongs to the technical field of electric power operation, and the method comprises the steps: obtaining an RGB image and point cloud data, and carrying out the preprocessing of the RGB image and the point cloud data, and generating a data pair in spatial alignment; image semantic features, point cloud geometric features and instance features are obtained through the image and point cloud feature extraction network; mapping the image semantic features and the point cloud geometric features to a unified embedding space; performing intra-modal and inter-modal feature alignment through a contrast learning mechanism to generate cross-modal fusion features; performing instance segmentation based on the point cloud instance features and the cross-modal fusion features; boundary point pair features are extracted to be matched with the template, and candidate poses are generated through voting; and iteratively optimizing and outputting the six-degree-of-freedom pose information. According to the method, the pose estimation precision and robustness under severe conditions such as strong light reflection and structure shielding are improved, the dependence on a large amount of labeled data is reduced, and high-precision real-time pose estimation is realized.

A vehicular driver monitoring system includes a vehicular interior rearview mirror assembly having a mirror head that accommodates a variable reflectance mirror reflective element, a driver monitoring camera and a near infrared light emitter. When the near infrared light emitter is electrically operated to emit near infrared, the near infrared light emitter emits near infrared light that illuminates at least a driver head region. While the variable reflectance mirror reflective element is operating in a first mode, and responsive to determination that visible light reflecting off glasses worn by the driver is obscuring the camera's view of the eyes of the driver, the vehicular driver monitoring system controls the variable reflectance mirror reflective element to reduce visible light transmissivity through the variable reflectance mirror reflective element to reduce visible light reflections at the glasses worn by the driver as captured in the image data captured by the driver monitoring camera.

A light-emitting device includes a base member having a recess inside which a light-emitting element is disposed; and a light-reflective member continuously disposed on an upper surface of the bottom portion and at least a portion of an inner lateral surface of a wall portion inside the recess of the base member, in a cross-sectional view, the inner lateral surface of the wall portion having a first surface, a second surface located above the first surface, and a third surface connecting the first surface and the second surface, a shortest distance between the second surface and the light-emitting element being larger than a shortest distance between the first surface and the light-emitting element, the third surface being located below an upper surface of the light-emitting element, and an upper end of the light-reflective member being located below an upper surface of the wall portion.

The embodiment of the invention provides a coaxiality calibration system and method. In the system, a calibration transmitting unit transmits first calibration light to an optical fiber branching unit; the optical fiber branching unit transmits the first calibration light to the laser communication terminal; the laser communication terminal converts the first calibration light into circular polarization calibration light and emits the circular polarization calibration light and circular polarization communication light; the calibration reflector reflects reflection calibration light obtained by reflecting the circular polarization calibration light and reflection communication light obtained by reflecting the circular polarization communication light to the laser communication terminal and then transmits the reflection calibration light and the reflection communication light to the optical fiber branching unit. The optical fiber branching unit transmits the reflection calibration light and the reflection communication light to a communication receiving unit of the laser communication terminal; the communication receiving unit detects receiving power; and the controller adjusts the corresponding angle adjusting device in the laser communication terminal based on the receiving power. According to the system, on the basis of the laser communication terminal, by means of an existing controller, accurate coaxiality calibration after the satellite is in orbit can be achieved.

An anamorphic near-eye display apparatus comprises a spatial light modulator with asymmetric pixels; an input transverse anamorphic lens; and an extraction waveguide that passes input light in a first direction to a lateral anamorphic reflector arranged to reflect the light back through the waveguide. Partially reflective extraction elements are arranged between the rear and front guide surfaces of the waveguide to extract the reflected light towards the pupil of an observer, maintaining the directionality of the fan of light rays from the spatial light modulator and anamorphic imaging system. A thin, transparent and efficient anamorphic display apparatus for Augmented Reality and Virtual Reality displays is provided.