2646 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 discloses a liquid medicine foreign matter detection method and system based on machine vision, and the method comprises the steps: obtaining multiband spectral data of a liquid medicine sample, and carrying out the normalization processing to generate a liquid medicine background standard spectral feature template; comparing the refractive index spectral characteristics of the template and the foreign matter-containing liquid medicine, and recording the surface roughness scattering mode and polarized light reflection angle change data of a foreign matter area; calculating a spectrum peak displacement quantized value according to the polarized light data, and extracting foreign matter edge spectrum gradient information in combination with a threshold value; calculating a transparency spectral attenuation coefficient based on the edge gradient information, and obtaining spectral contrast enhancement factors of different foreign matters in combination with the spectral response characteristic data; and if the enhancement factor does not reach the standard, adjusting the spectrum correction parameter and recalculating, fusing the scattering mode and the multi-angle incident spectrum response result to carry out consistency verification, and obtaining a final identification result containing the foreign matter material type and the danger level. The method can improve the drug detection accuracy and guarantee the drug quality safety.

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 provides a high-reflection plane metal part defect detection method and system based on a composite polarized light source, and a medium. The method comprises the following steps: illuminating a high-reflection plane metal part based on the composite polarized light source, adjusting a light source polarization angle and an LED wave band combination to construct a shooting environment, and collecting an image sequence; calculating a polarization intensity distribution parameter for the image sequence based on the relationship between the polarization intensity and the Stokes parameter to obtain a polarization intensity distribution image; analyzing the polarization intensity distribution image based on a polarized light reflection model, and outputting a specular reflection component and a diffuse reflection component; fitting the specular reflection component and separating the diffuse reflection component to obtain a reflection-removed image; based on an image enhancement algorithm, edge enhancement is carried out on the reflection-removed image to obtain an enhanced image, and based on a defect identification algorithm, the enhanced image is analyzed to obtain defect information; by removing the diffuse reflection component and reconstructing the image, the mirror interference is effectively stripped, and the defect identification precision is improved.

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.

To provide a technology that can capture the characteristics of glittering powder and reproduce them as an image with high precision and realism.SOLUTION: An image generation method comprises: a glittering agent information acquisition step for acquiring at least one of optical property information and shape information of glittering powder; a color signal calculation step for calculating a color signal of the glittering powder by applying the optical property information to a three-dimensional reflection property model, which is a mathematical model that describes a light reflection process of the glittering powder; a color value calculation step for calculating a color value of the state in which the glittering powder is applied based on the color signal; and an image generating step for generating an image of the state in which the glittering powder is applied based on the color value and the shape information.SELECTED DRAWING: Figure 1

The invention discloses an intelligent cabin environment sensing and control method based on a vehicle sensor, and relates to the technical field of intelligent automobiles, and the method comprises the following steps: in the operation process of an intelligent cabin, an infrared thermal sensing system collects thermal imaging data in an automobile in real time, extracts multi-dimensional feature data based on the obtained thermal imaging data, and sends the multi-dimensional feature data to the intelligent cabin; and forming an infrared thermal image characteristic data parameter set. According to the method, the key features of the infrared thermogram are extracted, and the machine learning model is combined, so that accurate identification and dynamic suppression of the thermo-optical interference state are realized. According to the method, sampling and filtering strategies can be adaptively adjusted in complex environments such as strong light reflection, a real thermal image contour is reconstructed, a non-human body heat source is effectively eliminated, the recognition accuracy and the operation stability of an infrared thermal sensing system are remarkably improved, the misjudgment rate is reduced, and the safety and the reliability of an intelligent cabin are enhanced.

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.

Document (100) with a security feature, comprising: a first substrate layer (103) having a first substrate layer region (105), wherein the substrate layer region (105) is impregnated with a black fluid over the entire thickness of the first substrate layer (103), the black fluid having carbon particles; a second substrate layer (107) with a second substrate layer region (109), wherein the second substrate layer (107) is arranged above the first substrate layer (103), the second substrate layer region (109) having a light reflection characteristic which differs from a light reflection characteristic of the first substrate layer region (105), wherein the first substrate layer region (105) and the second substrate layer region (109) form a composite security feature.

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 provides an intelligent target supervision method and system based on data analysis. The method comprises the steps that visible light and thermal infrared image sequences are synchronously collected through a coastline monitoring camera, and plastic garbage contour features and temperature distribution differences are recognized; segmenting the contour, extracting displacement to generate an ocean current trajectory prediction path, arranging a buoy collection device, and driving surface water flow to converge by using a propeller to guide garbage to move along the path to form a dynamic accumulation area; plastic garbage difficult to decompose is recognized and marked based on visible light reflection difference, offset is calculated in combination with temperature difference to generate a path correction instruction, the track of a collecting device is adjusted to preferentially intercept a target, and real-time images are synchronized to update closed-loop supervision. According to the technical scheme, intelligent recognition, dynamic gathering and precise interception closed-loop supervision of marine plastic garbage difficult to decompose are achieved, the pollution treatment efficiency is improved, and secondary diffusion is restrained.

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.

The invention provides a wafer edge detection mechanism, and belongs to the technical field of wafer detection. Comprising a wafer calibrator, the interior of the wafer calibrator is slidably connected with a soft rubber suction cup, the top of the soft rubber suction cup is movably connected with a wafer, one end away from the wafer calibrator is provided with a supporting frame, the top of the supporting frame is slidably connected with a camera, the bottom of the camera is fixedly connected with a focusing electric cylinder, and the bottom of the focusing electric cylinder is fixedly connected with a lens. And one end of the supporting frame is fixedly connected with a lifting electric cylinder. According to the wafer calibrator, by arranging the auxiliary supporting assembly and the driving calibration assembly, inclination of wafers of different sizes in the detection process can be improved, the influence caused by the amplitude of the wafer calibrator is relieved, the driving motor directly drives the flexible driving wheel to drive the wafers to rotate, the wafer vibration influence is reduced, the wafer edge collection stability of the camera is improved, and the detection accuracy is improved. The surface of the annular light source is clean, so that uniform and stable illumination can be provided, and the influence of light reflection and shadow on detection results is reduced.

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.

A display panel and a manufacturing method therefor, and a display device. A display panel (20) comprises: a substrate (21), a light-transmitting substrate (22), an electrophoretic liquid layer (23), a plurality of light converging and reflecting structures (24), and a plurality of corresponding scattering structures (25). The light converging and reflecting structures (24) reflect and converge light incident into the display panel (20), and direct the reflected light to the corresponding scattering structures (25), such that the reflected light passes through the scattering structures (25) and emerges from the display panel (20); and the scattering structures (25) can expand the irradiation area of the emergent light and improve the visual uniformity of the emergent light, thereby improving the display effect of the display panel (20). Moreover, the area of the orthographic projections of the scattering structures (25) on the substrate (21) is smaller than the area of the orthographic projections of the light converging and reflecting structures (24) on the substrate (21), such that at least part of the light incident to the light converging and reflecting structures (24) does not need to pass through the scattering structures (25), thereby reducing the loss of light, improving the reflection efficiency of the display panel (20), and improving the display effect of the display panel (20).

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 a laser cutting device for sheet metal parts, and particularly relates to the technical field of sheet metal laser cutting. Sheet metal parts of different specifications are placed on a first positioning seat and a second positioning seat correspondingly, machining of the two kinds of sheet metal parts is achieved, laser cutting and feeding do not affect each other, the cutting efficiency is improved, and the production cost is reduced. Intermittent opening of the two overturning plates is achieved through meshing driving of gears, during cutting, the lower surface of one pressing pad is tightly attached to a sheet metal part, the sheet metal part is cut through a laser cutting path along a strip-shaped penetrating hole, nitrogen is continuously introduced through a first air outlet in the bottom and a second air outlet in the side edge, and then the sheet metal part is cut. Air in the first positioning seat and the second positioning seat is exhausted, oxygen is isolated, heat input is reduced, material deformation is prevented, an air flow barrier is formed through air flow, laser cutting impurities are blown away, the laser cutting impurities are prevented from being attached to a cutting face or damaging a focus lens, light reflected and refracted by laser is blown away, interference is reduced, and the accuracy of a cutting path is ensured.

The present disclosure relates to a display device that makes it possible to provide a display device in which dimming of display light is reduced by using a reflection type polarizing plate.The display device includes a display, a camera, and a reflection type polarizing plate configured to selectively transmit first polarized light having a first polarization direction and selectively reflect second polarized light having a second polarization direction different from the first polarization direction. The reflection type polarizing plate is disposed in an imaging direction of the camera so that the reflection type polarizing plate transmits one of an image of natural light including first polarized light and second polarized light and a video on the display and reflects the other of the image of natural light and the video on the display, and the camera is configured to capture the image of natural light including only one of the first polarized light and the second polarized light provided through the reflection type polarizing plate. The technology of the present disclosure can be applied to, for example, a telecommunication apparatus and the like.

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.