26 results about "Active illumination" patented technology

The invention discloses an underwater image enhancement method and system based on binocular vision and polarization imaging. The method comprises the following steps: firstly, synchronously acquiring an orthogonal polarization image pair through a binocular polarization imaging unit, recovering scene depth information from the polarization image pair by using a binocular stereoscopic vision technology, and calculating a transmissivity graph; analyzing the polarization characteristic difference between target reflected light and backscattered light, establishing a polarization difference model, and separating background scattered light; solving an underwater imaging equation in combination with the depth information and a polarization difference model to obtain a preliminary restoration result of the target reflected light; and finally, further improving the image quality through the steps of multi-scale spectrum analysis, adaptive filter construction and post-processing by adopting a spectrum adaptive image enhancement technology. The system comprises a binocular polarization imaging unit, a calculation processing unit and an active illumination unit. According to the method, the problems of color distortion, low contrast and fuzzy details of the underwater image are solved, and the visual quality and usability of the underwater image are improved.

The invention relates to the technical field of robots and computer vision, in particular to an anti-dynamic-shielding mechanical arm visual servo method and system, and the method comprises the steps: calibrating an illumination response reference model before servo; in the servo process, the environment monitoring system senses the dynamic obstacle and predicts the movement of the dynamic obstacle; according to the predicted illumination disturbance, the active illumination array performs reverse compensation to maintain the image quality; and the system continuously evaluates the comprehensive stability index, and performs hierarchical response according to the index value, including illumination compensation, path maintenance or obstacle avoidance re-planning. According to the mechanical arm visual servo method and system capable of resisting dynamic shielding, the technical problem that in the prior art, due to the fact that illumination sudden change and physical shielding cannot be effectively processed during dynamic shielding, a visual system fails in advance is solved, and the mechanical arm visual servo method and system capable of resisting dynamic shielding can achieve pre-judgment and actively compensate illumination disturbance; servo task continuity is ensured under a multi-level response mechanism, and stability and robustness of a visual system in a complex dynamic environment are guaranteed.

The application provides a detection device and method for fasteners and a fastener, and belongs to the technical fields of precision manufacturing and industrial visual detection. The method comprises the following steps: performing multi-spectrum active illumination configuration on a fastener production line to generate multi-spectrum illumination parameter data; deploying a multi-spectrum light source array according to the multi-spectrum illumination parameter data to construct a multi-spectrum active sensing network; and through the fusion application of multi-spectrum active illumination and neural radiation field three-dimensional reconstruction technology, the recognition accuracy of the surface defects of the fastener is significantly improved, the geometric size measurement is realized to the level of ±0.003 mm, and the detection rate of the micro defects is improved to 99.5%.

The invention discloses a photographic image enhancement method based on a low-altitude economic unmanned aerial vehicle, and the method comprises the steps: transmitting a laser pulse, obtaining an echo signal of the laser pulse, and obtaining echo power data changing along with the echo time; acquiring a first image of active illumination and a second image of passive illumination in the same observation period; calculating atmospheric extinction coefficient distribution on a path from an observation point to a scenic spot according to the echo power data, and constructing a three-dimensional atmospheric particle field based on the atmospheric extinction coefficient distribution; calculating a target direct illumination component of the scene, and acquiring a spectral signal of the second image as a target spectral signal; obtaining a target intrinsic material parameter under passive illumination and a target illumination parameter after interference removal; and synthesizing and outputting an enhanced image through a graphic renderer. According to the method, the final enhanced image is established on the real atmospheric physical model, the problem of scene information loss in the prior art is solved, and the quality of the enhanced image is improved.

The invention relates to a direct flight time ranging method and system for structured light illumination, and belongs to the technical field of industrial automation, and the method comprises the steps: projecting a structured pulse laser illumination field to a target scene; the structured pulse laser illumination field forms a space pattern with a light and shade alternating contrast characteristic in the space; the spatial pattern at least comprises a high-brightness active illumination area and at least one low-brightness or non-illumination background reference area; identifying and separating a background light signal from a background reference area from light signals based on the distribution of the light signals of the active lighting area and the background reference area in the space pattern by projecting a structured pulse laser lighting field; according to the invention, the background noise component is estimated based on the background light signal, and the noise contribution related to the background noise component is removed from the light signal reflected by the target object in the target scene to obtain the effective signal after background suppression, so that the effective noise removal and the accurate detection of the effective signal are facilitated, and the distance measurement accuracy is improved.

The invention relates to a measuring point device (100) for measuring an object (200). The measuring point device (100) has a minimum dimension length (110) of at least 5 cm, a maximum dimension length (110) of at most 50 cm, a minimum dimension width (120) of at least 5 cm, a maximum dimension width (120) of at most 50 cm, a minimum dimension height (130) of at least 10 cm, and a maximum dimension height (130) of at most 125 cm, preferably at most 100 cm, particularly preferably at most 75 cm, and more specifically at most 50 cm. Furthermore, the measuring point device (100) has an identification device (140). The identification device (140) further comprises a passive identification means (142) and / or an active identification means (144). Furthermore, the identification device (140) has an active illumination means (150) and a passive illumination means (160).The identification device (140) allows for the unambiguous identification of the measuring point device (100). Furthermore, the invention relates to a corresponding method and system (1000).

The present application belongs to the technical field of laser ranging, and relates to a ranging system and method based on an asynchronous array single-photon detector. The system comprises a synchronous control module, an active illumination light source, a beam shaping unit, a core control module, a detection imaging system and an upper computer. The present application also proposes a ranging method based on an asynchronous array single-photon detector, which is suitable for the system. The present application can realize ranging and imaging functions by using only a single asynchronous array single-photon detector. Through the working mode of asynchronous array detection and statistical imaging, the dead time effect of the traditional single detector is dispersed to each independent pixel in the area array, thereby effectively reducing the adverse effects of the dead time on the ranging accuracy and data acquisition efficiency. In the meanwhile, the data acquisition efficiency is improved, and the ranging accuracy is further improved, which is suitable for high-speed, high-resolution ranging and three-dimensional imaging applications.

The present application relates to the field of photoelectric detection and intelligent identification, in particular to a cat-eye target detection active imaging system and method based on intelligent vision, comprising: an active illumination module for outputting a pulse laser with adjustable parameters, actively illuminating a target scene, and exciting a cat-eye effect backscatter echo of an optical device in the target scene; a coaxial imaging acquisition module for receiving the backscatter echo of the target scene and collecting information; an intelligent vision processing module for intelligently processing the received image data, outputting target information and scene perception data; an adaptive control module for constructing a closed-loop control link according to the scene perception data and the target information; a display and storage module for realizing human-computer interaction, displaying and storing real-time imaging pictures and target information. Thus, the problems of high false alarm rate, limited detection distance, poor environmental adaptability, and inability to realize target fine classification and continuous tracking in the prior art are solved.

The method for long-distance large-DOF multi-spectral displacement measurement of automatic compensation of deformation of measuring platform adopts multi-camera sub-region monitoring or single-camera scanning monitoring of the center change of the target to be measured to complete multi-point high-precision deformation measurement of the building; the target is designed into an active illumination target with Gaussian distribution (or other low-frequency light intensity distribution) of light intensity, the center of the target light spot is extracted by using the digital image processing technology such as feature point matching and barycentric algorithm, and the center extraction of the target center is better than 0.1 pixel; the magnification of the camera lens (fixed focus or zoom) is automatically corrected through the change of multiple light spot centers with a fixed interval of a single target; the measurement accuracy, the measurement efficiency and the reliability are improved through error compensation of six-degree-of-freedom deformation of the measuring platform.

The application provides a single-photon single-pixel full-spectrum camera covering a visible to near-infrared band, and belongs to the field of single-photon multi-spectral imaging; solves the problems of image detail loss, spectral proportion imbalance and limited spectral resolution in the prior art; the camera is composed of a multi-spectral light emitting module, a single-photon single-pixel imaging module and a computing processing module which can be modularly integrated; the emitting module integrates multiple independently modulated pulsed lasers to realize multi-band active illumination; the imaging module uses a digital micromirror device to load a compressed sensing mask to modulate target reflected light, and records photon events in the mask; the computing processing module extracts mask measurement values based on discrete photon events, reconstructs full-spectrum and photon counting images, and realizes detail enhancement and spectral prediction in combination with a correlation optimization neural network; the application can realize high-precision imaging and spectral restoration in an extremely weak light scene, and is suitable for real-time full-spectrum imaging of a portable, unmanned and embedded platform.

The invention provides a polarization difference imaging method, a polarization difference imaging device, a polarization difference imaging system and electronic equipment. The polarization difference imaging method can comprise the following steps: measuring a Mueller matrix of a target scene, wherein the target scene comprises a to-be-measured object and a scattering medium environment where the to-be-measured object is located; determining an optimal illumination light polarization azimuth angle of the target scene by using the Mueller matrix of the target scene, wherein the image quality of an emergent light polarization angle image of the target scene is optimal under the active illumination condition of the optimal illumination light polarization azimuth angle; determining a backward scattering light polarization angle of the target scene under the active illumination condition of the optimal illumination light polarization azimuth angle; and obtaining a polarization difference intensity image of the target scene by using the backward scattering light polarization angle of the target scene. According to the invention, the polarization difference imaging quality can be effectively improved.

The invention provides a vehicle control device, system and method. The vehicle control device comprises a main control module and an optical sensor connected with the main control module. The optical sensor is used for collecting optical signals generated when the vehicle control equipment moves on the contact surface and transmitting the optical signals to the main control module; the main control module is used for generating cursor operation information for controlling a target interaction interface according to the received optical signal, and sending the cursor operation information to the vehicle host, so that the vehicle host executes a target vehicle function based on the cursor operation information; wherein the optical sensor works in an active illumination mode, and the target interactive interface is an interactive interface displayed by the target vehicle-mounted display screen. According to the technical scheme, the problem that a traditional control mode is highly dependent on the environment can be solved, and the control accuracy is improved; in addition, the vehicle can be effectively controlled only by moving the vehicle control equipment, and operation is convenient and fast.

The invention relates to the technical field of high-temperature material mechanical test and non-contact optical full-field measurement, in particular to the technical field of fatigue test equipment, and discloses a high-temperature tension-torsion composite fatigue test device integrated with a time gating DIC, which comprises a mechanical loading measurement module and an imaging module working with the mechanical loading measurement module, the mechanical loading measurement module is provided with a clamping assembly and a transmission assembly which are used for clamping a sample and transmitting tension and torsion combined load, and a tension test assembly and a torsion test assembly which are respectively used for measuring axial deformation and torsion deformation of the sample; the imaging module comprises an active illumination unit, an image acquisition unit and a synchronous control unit, and the synchronous control unit is configured to synchronously trigger the active illumination unit and the image acquisition unit at a preset phase according to a fatigue load cycle signal so as to obtain a time sequence structured light image of the surface of the sample.

The invention provides a multispectral radiation temperature measuring device and a multispectral radiation temperature measuring method based on an endoscopic probe. The multispectral radiation temperature measuring device and the multispectral radiation temperature measuring method are particularly suitable for temperature detection of engine turbine blades. The device comprises an endoscopic probe, a cooling protective cover, a fixed flange plate, a multispectral camera and a three-dimensional temperature field analysis module, radiation signals and image information of a blade are effectively obtained through a reflector and a dichroscope which are arranged at the front end of the endoscopic probe, and by combining the advanced cooling protective cover and an active illumination structure design, the blade radiation detection accuracy is improved. A multispectral camera is used for imaging, and in-situ online measurement of the three-dimensional morphology and the temperature field of the turbine blade is achieved. The device is compact in structure, and has the characteristics of small size, high temperature resistance, high definition, full-field measurement and the like.

The invention discloses a water conveyance tunnel disease detection device and method based on a laser line scanning camera array. The device comprises a mobile detection platform, a laser line scanning camera array, a posture and position measurement unit, a synchronous control unit, a data acquisition and processing unit and a disease identification module. The laser line scanning camera array is annularly arranged in the circumferential direction of the section of the tunnel, and line scanning gray imaging is carried out under active illumination of near-infrared laser. The synchronous control unit controls the trigger frequency and the exposure time based on the minimum recognizable scale of the disease, and motion blur is inhibited; the posture and position measuring unit provides PPS time synchronization and event time marks, and high-precision alignment of images and posture data is achieved; the data acquisition and processing unit completes image correction, splicing and spatial registration to generate a two-dimensional expanded image of the inner wall of the tunnel; the disease identification module automatically identifies crack and leakage diseases based on the image. Full-coverage scanning of the inner wall of the tunnel can be realized under the condition of high-speed continuous movement, and the inspection efficiency and the detection precision are remarkably improved.

A depth data measurement device, and a corresponding application method are disclosed. The measurement device includes: a projection assembly for projecting linear light onto an imaging object in relative motion; an image sensor for imaging based on the reflected light of the linear light, the each pixel sending a valid signal with a timestamp when the change in the amount of light received per unit time exceeds a threshold; and a processor for calculating the surface depth information of the object based on the positions of pixels corresponding to the valid signals, the timestamps of those valid signals, as well as the relative motion information. The present invention employs linear light to achieve active illumination and imaging of an object undergoing relative motion, and combines an image sensor in which each pixel can independently generate a valid signal when the brightness changes, so that imaging can be performed only for the valid signal, and the timestamp and relative motion information are used to determine the position of the depth data, thereby realizing high-speed depth information acquisition and processing with a simple projection mechanism and extremely low computing power requirements.

The invention discloses a beef cattle body length non-contact accurate measurement method in a channel column-passing scene, and relates to the technical field of livestock three-dimensional measurement, and the method comprises the steps: generating an imaging configuration list and an environment label through an environment near-infrared pollution ratio, a glare index and a stroboscopic phase, and carrying out the linkage of an infrared cut-off filter, wave band / power, active illumination, polarization, exposure, a global shutter and stroboscopic inhibition; single cattle confirmation, quality gating and attitude gating are carried out, and multi-frame acquisition is triggered in short window time synchronization; a three-dimensional back line is obtained in the ridge area based on polarization normal and stereo depth combined constraint, an acromion and a recommended part are determined, extrapolation is carried out on a missing section limited spline, the geodesic body length is calculated, and an evidence field is generated; and monitoring and calibrating the health degree, re-calibrating an out-of-limit minimum sequence, solidifying an evidence packet and feeding forward a threshold value. Therefore, the measurable rate and the consistency are improved under strong direct incidence, wet back reflection and stroboflash, the quantity values are comparable, the reasons can be checked, and the maintenance is not interrupted.

The application relates to a binocular synchronous imaging system and method based on time consistency control, relates to the technical field of optical imaging and electronic information processing, and solves the problems of inconsistent image sampling time, insufficient time synchronization precision and poor synchronization output stability in the existing binocular imaging system. The application sends a synchronous trigger signal to a binocular image sensor through two physically consistent independent transmission paths, realizes binocular synchronous exposure, and performs format conversion processing on image data; a timestamp is generated for effective image data based on a unified time reference; whole-frame buffering is performed through a DDR storage module, and synchronous consistency is determined based on a binocular image time difference and a buffering state, so that binocular image synchronous output is realized when the synchronization condition is met. According to the image brightness information, the exposure parameter and the active illumination brightness are jointly adjusted, so that the imaging stability and the environmental adaptability in a low-illumination scene are improved. The application is suitable for application scenes such as night close-range target observation.

A handgun may include a slider-integrated active illumination sight. By integration of electrical connectors into the slider that conduct power from a rear powered sight to a front sight mounting area, a light source inside the front sight can emit light to the shooter's eye and make the front sight visible in any light condition. In combination with actively illuminated rear sight marks, the user now sees three evenly illuminated aiming marks. Alternatively, light can be conveyed from the rear unit to the front aiming marks by means of fiber optics.

A device and method to test microelectronic parts to determine whether the parts are compromised by active illumination in a testing fixture by analysis of emission metrics.

The application discloses an active and passive integrated spectral polarization imaging device in an extreme light environment, and belongs to the field of target detection in an extreme light environment. The device comprises a main and passive common optical axis imaging module, a laser active illumination module, an imaging detection module and a mode control and signal processing module. The main and passive common optical axis imaging module establishes a common optical axis transmission channel in which an active emission light path and a target reflection receiving light path are spatially overlapped. The laser active illumination module provides 532nm and 808nm switchable coaxial illumination. The imaging detection module comprises a receiving imaging sub-module, a polarization modulation sub-module and a detection output sub-module, and is used for collecting intensity images and polarization images. The mode control and signal processing module realizes adaptive switching and cooperative control of an active illumination imaging mode and a passive polarization imaging mode. The device can realize natural correspondence of active intensity information and passive polarization information in space, and avoids parallax and registration errors caused by separate arrangement of multiple systems.

The present application relates to the technical field of image recognition, and particularly relates to a method for detecting and identifying underwater dynamic targets, which comprises the following steps: collecting underwater images and obtaining underwater multi-source physical signals by means of an underwater vehicle equipped with an imaging and collecting unit, an active illumination unit, a depth sensing unit and a motion sensing unit; extracting a backscattering light intensity distribution field and an apparent optical flow divergence field based on the underwater multi-source physical signals; calculating a spatiotemporal optical flow divergence-scattering coupling entropy based on the backscattering light intensity distribution field and the apparent optical flow divergence field; generating an attention weight matrix based on the spatiotemporal optical flow divergence-scattering coupling entropy, and performing element-by-element modulation on the attention weight matrix and a shallow feature map extracted by a target detection network to obtain a pure target feature map; performing multi-scale feature extraction and classification regression processing based on the pure target feature map, and outputting a dynamic target category probability, corresponding target bounding box coordinates and a motion vector.

The invention discloses a digital camera image processing control method and a digital camera, and relates to the technical field of image processing, and the method comprises the following steps: incident light sequentially passes through a diffractive optical element phase mask and an imaging lens group and then reaches a single photon avalanche diode array; each single-photon avalanche diode pixel unit in the single-photon avalanche diode array outputs a trigger pulse when detecting photons; the image processor obtains an original photon event data set, performs time binning processing on the original photon event data set to obtain a three-dimensional photon counting array, and constructs a depth distribution map and an initial brightness estimation map; the image processor performs color mapping processing on the initial brightness estimation map to generate a color output image, and stores the color output image in a storage medium. According to the invention, high-sensitivity imaging can be realized under an extremely low illumination condition, and two-dimensional intensity information and three-dimensional depth information can be synchronously obtained from single exposure without active illumination.

The utility model discloses an active lighting ceramic luminous ball. Relates to the technical field of three-coordinate measuring instruments. The ceramic luminous ball vibrates in the data measuring process, so that the joint of the ceramic ball and the measuring rod is loosened, and the ceramic ball is separated from the measuring rod. The luminous ceramic ball comprises a luminous ceramic ball main body and a butt joint part, the butt joint part is arranged above the luminous ceramic ball main body, and the butt joint part is provided with a butt joint frame connected above the luminous ceramic ball main body. The sliding block is pressed to drive the connecting rod to rotate so as to drive the transmission block to move, the transmission block can move to drive the fixed blocks to move, the two fixed blocks are attached to each other to complete butt joint installation of the luminous ceramic ball body and the measuring rod, and the elastic force of the spring enables the two fixed blocks to be tightly attached to each other. And the magnetic sheets at the joint of the two groups of fixing blocks attract each other, so that the fixing effect of the two groups of fixing blocks is improved, and the situation that the fixing blocks are loosened due to external vibration is reduced.

The invention discloses a high-precision large-range polarization spectrum measurement system and a polarization spectrum measurement method, and solves the technical problems of low measurement precision, complex regulation and control, weak degree of freedom and large energy loss of the existing polarization spectrum measurement system. The light source module is adopted for active illumination, the incident light intensity can be increased, and external environment interference is avoided; meanwhile, the light source module is used for generating measurement light beams with different wavelengths, the micro-polarization array is combined, simultaneous measurement of spectral information and polarization information is achieved, and the problem that the polarization spectrum measurement precision is limited due to the fact that a traditional discrete polarization spectrum measurement system is low in information acquisition dimension can be solved; besides, reflected light beams of different wavelengths of the to-be-measured sample are respectively focused to the micro-polarization array by using the zoom lens, so that real-time polarization spectrum measurement of the to-be-measured sample in the depth direction is realized, the regulation and control precision is high, and the size is small.

This invention belongs to the field of optical inspection technology, specifically a semiconductor lead frame mold defect detection device based on computer vision. It includes a frame and a platform for carrying the workpiece to be inspected. The platform is fixedly mounted on the upper surface of the frame. A limiting plate for clamping the workpiece is provided on the side wall of the platform. A dual-axis slide rail is provided on the upper surface of the frame, and a slide table is slidably mounted on the dual-axis slide rail. A detection unit and a mounting plate for mounting a nozzle are fixedly mounted on the bottom surface of the slide table. The detection unit has a built-in optical imaging module and an image processing unit for acquiring an initial image of the mold surface under active illumination. The initial image contains multispectral and polarization information. Physical disturbance is applied to a local area of ​​the workpiece surface by spraying through the nozzle. The energy of the physical disturbance is pre-calibrated to be lower than the minimum energy required to completely remove typical deposits. The image processing unit solves the problem of high false positive rates caused by appearance similarity in pure visual inspection, significantly reducing the over-detection rate.