2198 results about "Projector" patented technology

The invention relates to the technical field of detection, in particular to a complex shell detection method and system based on structured light scanning. The method comprises the following steps: calculating a wrapped phase value and a phase modulation amplitude of each pixel point under each frequency, calculating discrete probability distribution containing candidate stripe series and a corresponding probability for each pixel point based on a multi-frequency wrapped phase difference, generating an initial pixel confidence map, and constructing an energy function; the penalty weight of the smooth item is determined according to the phase modulation amplitude and the wrapped phase gradient local variance, obtaining an initial fringe order distribution diagram, updating discrete probability distribution by using an initial pixel confidence map, re-minimizing an energy function to obtain a corrected fringe order distribution diagram, and reconstructing a final three-dimensional shape. And iteratively optimizing a projector principal point and a radial distortion coefficient in system calibration parameters. According to the scheme, the geometric details of the surface can be reserved, and the processing effect and the measurement precision of the complex curved surface and the high-curvature area are improved.

The invention discloses a space-time speckle projection three-dimensional imaging method based on multi-frame optical flow alignment. Firstly, a projector based on DLP is used for projecting a space-time speckle pattern to a measured scene, and a binocular camera synchronously collects a three-dimensional space-time speckle image. The calibration parameters of the binocular camera are used to carry out stereo correction on an acquired original speckle image, and a parallax image is generated frame by frame in combination with a coarse-to-fine single-frame speckle matching strategy. And estimating a two-dimensional inter-frame displacement field between continuous disparity maps by using an optical flow method by taking an intermediate frame disparity map as a reference, compensating motion artifacts in a space-time speckle image, and ensuring strict space-time registration of a dynamic target. And based on the speckle image after motion correction, a speckle matching strategy is expanded to a time-space domain, and high-precision multi-frame three-dimensional measurement of a complex dynamic scene is realized. The method is suitable for performing rapid and high-precision three-dimensional modeling on a moving target in an unstructured environment, and can perform accurate three-dimensional measurement on a high-speed dynamic target undergoing any translation or rotation motion.

The invention belongs to the technical field of computer vision and optical measurement, and discloses a three-dimensional reconstruction method and device based on multi-frequency fringe synchronous optimization and a medium, and the method comprises the following steps: based on a monocular structured light system, projecting a plurality of groups of sine fringe images with different frequencies to the surface of an object to be measured through a projector, and carrying out the stepping of a plurality of phases, acquiring a corresponding image sequence by using a camera; using a structured light phase shift method to obtain a relative phase value of a pixel point; obtaining an initial absolute phase value and modulation intensity based on a structured light phase shift method and a multi-frequency heterodyne method; and carrying out joint optimization on the absolute phase and modulation intensity parameters of the multi-frequency fringes through a Gaussian-Newton iteration method. According to the method, the anti-noise capability and the reconstruction precision are improved, a parameter adjustment and threshold recovery mechanism is introduced in the optimization process, the convergence stability and abnormal value elimination are ensured, and the method is suitable for high-precision structured light application scenes such as industrial vision measurement and complex surface detection.

The invention relates to a light curtain. The wiring workability under the condition that an operation indicating lamp is arranged on a light curtain of an optical synchronization system is improved. The light curtain includes a synchronization unit (optical axis for timing synchronization) for synchronizing the light projection timing of the light projector and the light reception timing of the light receiver by optical communication. A safety signal generated on the basis of whether or not an optical axis formed between the light projector and the light receiver is in a light-shielding state is output to the outside. The light curtain comprises a first operation indicating lamp arranged in the light projector; the second operation indicating lamp is arranged in the light receiver; an optical element (optical axis) provided in each of the light projector and the light receiver and configured to display the first operation indicator light and the second operation indicator light in conjunction with each other; and a control circuit configured to display the first operation indicating lamp and the second operation indicating lamp in linkage by using at least one group of optical elements.

The invention relates to the technical field of projection, and discloses a method, a device and equipment for measuring a projection ratio and an off-axis ratio, and a medium. The method comprises the following steps: acquiring a projection test image obtained by sampling a projection area and a reference area by an image sampling device of the projector; performing area feature extraction processing on the projection test image to obtain image size information and central point pixel information of a projection area and image size information of a reference area; determining the projection ratio of the projector based on the image size information of the projection area, the projection distance information of the projector and the image size information and the actual size information of the reference area; and determining the off-axis ratio of the projector based on the central point pixel information of the projection area, the optical axis pixel information of the projector and the image size information and the actual size information of the reference area. According to the embodiment of the invention, the cost of measuring the projection ratio and the off-axis ratio can be reduced.

The invention discloses a semantic segmentation method based on phase contour constraint, and belongs to the technical field of computer vision. The method comprises the following steps of: acquiring a two-dimensional texture image and a deformed stripe image of a scene to be detected in the same view field by using a calibrated camera-projector system; resolving the deformed fringe image through a multi-step phase shift and Gray code technology to obtain absolute phase distribution, and calculating a gradient field; according to a preset sudden change condition, extracting a physical edge contour reflecting the depth change of the object from the gradient field; and mapping the physical edge contour into the two-dimensional texture image based on a pixel coordinate corresponding relation to accurately define a semantic object region, endowing a corresponding category label, and finally generating a semantic label mask image. According to the method, the uncertainty of the visual texture edge is corrected by utilizing the physical phase information, the problem of edge extraction in a complex illumination scene is effectively solved, automatic generation of semantic segmentation data is realized, and the training precision and robustness of a semantic segmentation model are improved.

The invention provides a structured light projector calibration method and system and a medium, and the method comprises the steps: projecting a multi-frequency stripe pattern to a target region based on an MEMS micromirror array module, obtaining a distorted image sequence, and carrying out the phase decoding, and obtaining a phase diagram corresponding to each frequency; resolving the phase diagram based on a phase shift method and an optical path triangulation principle to obtain a preliminary three-dimensional point coordinate; constructing a neural network model and a calibration sample set, obtaining a real three-dimensional coordinate by using a standard calibration plate or a known curved surface, and calculating the deviation between the initial three-dimensional point coordinate and the real three-dimensional coordinate to obtain a training sample set; and training the neural network model according to a training sample set based on an Euclidean distance loss function, outputting a three-dimensional offset compensation amount according to the neural network model, correcting the initial three-dimensional point coordinates, and realizing an end-to-end error self-compensation mechanism through the neural network model, so that deviation compensation is effectively performed on the three-dimensional point coordinates, and the accuracy of the three-dimensional point coordinates is improved. And the three-dimensional reconstruction precision is improved.

The present application relates to a projection picture correction method, and a projection device. The method comprises: acquiring a captured image captured when a projection device projects a preset image, wherein the preset image comprises a positioning mark and a correction mark, the positioning mark is used for positioning the preset image, and the correction mark is used for performing precision correction; and determining an image correction parameter on the basis of the positioning mark and the correction mark, and correcting a projection picture on the basis of the image correction parameter. By means of the present application, accurate coordinates of a projector screen in a projection device coordinate system required for projection picture correction can be determined on the basis of a captured image, such that the difficulty in projection picture correction can be reduced, and the efficiency and accuracy of projection picture correction can also be improved.

A sensing system may include an illumination projector, an image sensor, and one or more controllers. The illumination projector may project a partial illumination pattern on a target object. The image sensor may sense the partial illumination pattern projected on the target object and may generate signals representative of the sensed illumination pattern. The one or more controllers may control the illumination projector and process the signals generated by the image sensor. The illumination projector may include a microlens array and an emitter array. A spatial relationship of emitters of the emitter array to microlenses of the microlens array may cause the emitter array and the microlens array to project light upon the target object in the partial illumination pattern.

A camera monitor system (CMS) for a vehicle includes at least one rear-facing camera that is configured to capture images from a field of view alongside the vehicle. At least one display depicts the captured images to an operator and includes a transparent medium that has at least one display area. A projector that is configured to project the captured images on the display area. A controller is in communication with the at least one camera and the projector. The controller is configured to command the projector to depict the captured images in response to a vehicle operating parameter.

A smart safety system can include an internal camera configured to photograph an inside of a workplace, a beam projector configured to illuminate a worker when the worker is located inside the workplace, a fence lighting device located in an upper end of a fence of the workplace, and an integrated controller configured to receive an image signal from the internal camera and process the image signal to determine whether the worker is located in the workplace, when the worker is located in the workplace as a result of determination, control the beam projector to illuminate the worker in a first color beam, and control the fence lighting device to emit light in a second color.

An augmented reality collaboration system includes an assembly platform, a first projector, a camera and a computing circuit. The first projector projects a first projection image to the assembly platform. The camera shoots the assembly platform and the first projection image projected on the assembly platform to obtain a first shooting image. The computing circuit creates a three-dimensional model in a virtual three-dimensional space, arranges a standard operating procedure, sets a mark pattern on the three-dimensional model according to the standard operating procedure, analyzes the first shooting picture, and performs a calibration operation on the first projector to obtain a first calibration parameter. The computing circuit enables the first projector to generate a first corrected pattern according to the first calibration parameter and the mark pattern, and projects the first corrected pattern to the object-to-be-assembled according to the standard operating procedure.

The invention provides an automatic trapezoid correction method and system for a projector and a medium. The method comprises the following steps: acquiring attitude information of the projector and spatial information of the projector and a projection surface; under the condition that optical emission parameters of the projector are known, a projection geometric model is established based on the attitude information and the space information, and transformation parameters used for projector trapezoidal correction are generated accordingly. And controlling the projector to execute a trapezoidal correction action based on the transformation parameter. And controlling the projector to project a preset calibration pattern, acquiring an image of the calibration pattern by adopting the image acquisition device after the trapezoidal correction action is executed, extracting image features, and acquiring geometric parameters corresponding to the actual projection picture based on the image features. And determining a calibration error based on the difference between the geometric parameter and the transformation parameter, and generating a compensation parameter according to the calibration error. And writing the compensation parameter into the projector so as to compensate the transformation parameter when the projector performs trapezoidal correction. Through the steps, the projector generates a corresponding correction coefficient.

A display device includes: an image projector including an image forming device and a meta-lens module and configured to output image light formed by the image forming device; and a meta-waveguide configured to transfer the image light output from the image projector, to an observer's field of view, the meta-waveguide including waveguide element configured to totally reflect light inside, an input coupler including a plurality of first nanostructures forming a first phase gradient in a first direction and configured to couple the image light from the image projector to an inside of the waveguide element, and an output coupler including a plurality of second nanostructures forming a second phase gradient in a second direction different from the first direction and configured to output the light coupled to the inside of the waveguide element by the input coupler, to an outside of the waveguide element.

According to examples, a system for detection, analysis and correction of disparities in display systems utilizing one or more disparity sensing port is described. The system may include a processor and a memory storing instructions. In addition, the system may include a first lens including a first waveguide for displaying a first image and a second lens including a second waveguide for displaying a second image. Furthermore, the system may include a first projector associated with the first lens to propagate first display light associated with the first image, a second projector associated with the second lens to propagate second display light associated with the second image and a disparity sensing port to receive the first display light and the second display light to determine a disparity associated with the first image and the second image.

The invention discloses a telecentric imaging-based three-dimensional reconstruction method of a multi-projection structured light measurement system, and relates to the technical field of three-dimensional reconstruction. The method comprises the following steps: firstly, solving an internal parameter and a part of external parameters of a telecentric camera; then, based on a reverse calibration mechanism taking the target projector as a reference, external parameters of the telecentric camera are completely recovered; secondly, according to the external parameters of the telecentric camera and the external parameters of the projectors, initial relative pose matrix parameters between the telecentric camera and the projectors are determined; secondly, by taking minimization of a re-projection error as a target and taking initial relative pose matrix parameters between the telecentric camera and all projectors and three-dimensional coordinates of all calibration points as optimization variables at the same time, determining optimal relative pose matrix parameters between the telecentric camera and all the projectors; and finally, constructing a combined constraint model of combined geometric constraint of the multiple projectors and the telecentric camera, and realizing non-spliced high-precision three-dimensional reconstruction. According to the method, the precision of a three-dimensional reconstruction result is improved.

A vehicle includes a vehicle body defining a passenger compartment and a tailgate area arranged rearwardly of the passenger compartment and having an opening to provide access of the tailgate area. The vehicle also includes a tailgate pivotally coupled to the vehicle body and arranged to selectively cover the opening of the tailgate area. Moreover, the vehicle includes a display screen arranged to be displaced between a stowed position and a deployed position. Furthermore, the vehicle includes a projector configured to project a visual media content on the display screen arranged at the deployed position. The display screen is mounted to the ceiling of the vehicle and inside the tailgate area when the projector is mounted to the tailgate, or the display screen is mounted to tailgate when the projector is mounted to the ceiling of the vehicle and is arranged inside the tailgate area.

Disclosed herein are systems for enhancing physical security of a vehicle occupant comprising a holographic projector component; a data repository component; a sensor component; a digital camera component; and a display screen component communicatively connected with the digital camera component. Also disclosed herein are associated methods for enhancing physical security of a vehicle occupant.

The utility model relates to a projection light machine and a projector. The projection light machine comprises an optical assembly, and the optical assembly comprises a mounting frame, a first light-transmitting element, a first Fresnel lens, a second light-transmitting element, an LCD screen and a third light-transmitting element. A first cavity is defined by the first light-transmitting element, the first Fresnel lens and the mounting frame, a second cavity is defined by the second light-transmitting element, the LCD screen and the mounting frame, a third cavity is defined by the LCD screen, the third light-transmitting element and the mounting frame, and a fourth cavity is defined by the first Fresnel lens, the second light-transmitting element and the mounting frame. At least one of the first cavity, the second cavity, the third cavity and the fourth cavity is a liquid cooling cavity, and at least the other one of the first cavity, the second cavity, the third cavity and the fourth cavity is an air cooling cavity. The optical assembly can be well cooled in a mode of combining air cooling and liquid cooling, and the heat dissipation effect of the optical assembly can be improved.

The invention relates to the technical field of projection, and discloses a projector asynchronous focusing method and device, equipment and a medium. The method comprises the following steps: controlling a projection lens of a projector to move at a constant speed along an optical axis; in the constant-speed displacement process of the projection lens, an image sampling device is controlled to carry out continuous image sampling on a projection picture of the projection lens, and multiple groups of first sampling images are obtained; performing definition evaluation on each first sampling image to obtain a first definition evaluation value; based on the displacement speed of the projection lens and the first definition evaluation value, predicting the position of the projection lens when the definition of the projection picture reaches a peak value, and obtaining a target focusing position; and controlling the projection lens to move to the target focusing position. According to the embodiment of the invention, the automatic focusing speed can be improved on the basis of keeping the focusing precision.

The utility model discloses a computer heat dissipation holographic fan which comprises a mounting frame and a mounting plate, a heat dissipation assembly is mounted in the mounting frame, a rotating cylinder is rotatably mounted at the top of the mounting plate, a holographic projector is fixedly mounted in the rotating cylinder, a rectangular groove is formed in the top of the holographic projector, and the rectangular groove is formed in the top of the holographic projector. A projection lamp strip is fixedly mounted in the rectangular groove; when an arranged driving motor rotates, a connecting column can be driven to rotate, so that a holographic projector rotates, a projection lamp strip is driven to rotate, holographic projection is formed by matching the rotating holographic projector with the projection lamp strip turn-on frequency, and customized 3D models, images and videos can be projected and displayed; in addition, the user can easily upload and manage contents and create personalized and dynamic PC settings, and by means of intelligent speed regulation, wireless power supply and efficient heat dissipation capabilities, the system performance of the user can be improved, and the game atmosphere of the user can be converted into immersive visual experience.

This invention provides an optical glass, its preparation method, and an optical element. The optical glass contains the following components in molar percentage: B₂O₃: 5.0%–19.9%; SiO₂: 5.0%–28.0%; La₂O₃: 0.05%–11.5%; Gd₂O₃: 0%–10.0%; Y₂O₃: 3.6%–15.0%; ZnO: 22.5%–60.0%; the refractive index n of the optical glass is... d An Abbe number of υ is above 1.78. d The temperature coefficient of refractive index is 35-45. The optical glass of this invention has a large positive temperature coefficient of refractive index. When used in combination with optical glass having a negative temperature coefficient of refractive index, it can effectively correct temperature drift caused by rapid temperature changes or high-temperature environments, fix the focus, and maintain clear imaging. It is suitable for vehicle-mounted cameras or projectors, copiers, laser printers, and playback devices that generate a lot of heat during use.

A gaming system comprising at least one transparent display where at least two gamers are standing on opposite sides of the display. The first gamer is wearing a first pair of filtering glasses that limit the first gamer to seeing only a first stream A of images comprising video being emitted by the transparent display. The second gamer is wearing a second pair of filtering glasses that limit the second gamer to seeing only a second stream B of images comprising the emitted video. Each gamer perceives different augmentations of the opposing player as the game is operated causing the video comprising the A and B streams. The system further comprises an additional display functioning like the first display but separated to form an interior corridor, where a projector is running on rails within the corridor to create a movable ghost image via a pepper's mill apparatus.

The utility model relates to the technical field of spliced paper cards, in particular to a pitching game paper card structure which comprises a base plate, a ball frame paper card assembly clamped at one end of the base plate, a paper card projector placed at one end, far away from the ball frame paper card assembly, of the base plate, and a paper card ball placed on the paper card projector. The ball frame paper card assembly is provided with the ball inlet position facing the paper card projector, after splicing is completed, the paper card ball is placed on the paper card projector, the paper card projector is rapidly pressed to project the paper card ball to the ball inlet position, the paper card ball can be repeatedly projected to the ball inlet position, the interactive interestingness of the ball throwing game paper card structure is increased, and the ball throwing game is more interesting. And the utilization rate of the pitching game paper card structure is improved.

The utility model belongs to the field of projector supports, and particularly relates to a liftable and rotatable data visualization projector support, which comprises a projector mounting plate and a projector fixing bolt, the projector fixing bolt is fixed in the middle of the upper surface of the projector mounting plate, and a supporting cylinder is arranged at the bottom of the projector mounting plate. A lifting rod is movably inserted into an inner cavity of the supporting cylinder. A first gear box is mounted at the top of the supporting cylinder, and a second gear box is mounted at the top of the lifting rod; triangular supporting frames are annularly arranged at the bottom of the supporting cylinder, screw holes are formed in the bottoms of the triangular supporting frames in a penetrating mode, adjusting screw rods are in threaded connection with the interiors of the screw holes, and self-locking universal wheels are rotationally connected to the bottoms of the adjusting screw rods. According to the novel projector, the height and the horizontal irradiation angle are flexibly adjusted, the worm gear and the worm are matched to achieve self-locking performance, the lifting rod and the projector mounting plate can be locked, the projector is more stable in use, and the projection angle and height of the projector are more accurately adjusted.

The utility model relates to a movable projection display device, which comprises a top seat, a bottom seat and a projector body, a rotating assembly is arranged on the top seat, a fixing assembly is arranged at the rotating end of the rotating assembly, the fixing assembly is detachably connected with the end part of the projector body, and the pitch angle of the projector body is adjusted through the rotating assembly. The top of the base is provided with a placing groove for placing a projector body, a supporting column is arranged between the top seat and the base, and four corners of the bottom of the base are respectively provided with a self-locking universal wheel. The utility model has the advantages of flexible adjustment and convenient storage.

The application relates to a rapid matching positioning optical projection system and method, wherein the optical projection system comprises a projector, a camera, an information editing module, a rapid positioning module and a projection operation module; the information editing module is used for compiling virtual process information required by each working procedure according to an assembly process flow, and generating a guide information set file; the rapid positioning module is used for determining two-dimensional coordinates of a preset target ball mark reference point in a camera image after movement according to projected workpiece images before and after movement of the optical projection system, and corresponding points of the target ball mark reference point in a projector image, and determining pose information of the projected workpiece relative to a projector space coordinate system in combination with measurement data of three-dimensional coordinates of the target ball obtained by a measuring device; the projection operation module is used for generating a working procedure guide image through a three-dimensional space projection algorithm according to the guide information set file and the pose information; and the projector is used for projecting the working procedure guide image on a surface of the projected workpiece.

A light source apparatus includes a light guide having a side surface extending in a first direction and first and second end surfaces; an angle converter bonded to the first end surface; a base; a substrate on which a light source configured to output light toward the side surface is mounted and which is fixed to the base; and a cover member fixed to the base and configured to accommodate along with the base the angle converter, the base including a first accommodating section configured to accommodate the light guide in a state in which the side surface is exposed, the light guide fixed to the first accommodating section, and a second accommodating section configured to accommodate along with the cover member an accommodated section that is a portion from the angle converter to a portion of the light guide that faces the angle converter, the second accommodating section and the cover member surrounding a circumference of the accommodated section and form an accommodating space configured to accommodate the accommodated section, a portion of the light guide that is fixed to the first accommodating section being a fixed end, and a portion of the light guide that has the first end surface, to which the angle converter is bonded, and faces the angle converter being a free end.

A projection apparatus (102) for image projection of an image on a subject (114). The apparatus (102) includes an image detector (104) having a detector field of view, where the image detector (104) is configured to detect an input image of the subject 5 (114). The processor (204) is configured to generate an output image based on the input image, where the output image includes content representing at least a portion of the content of the input image. An image projector (106) has a projector field of view, where the projector field of view overlaps the detector field of view, and where the image projector (106) is configured to project the output image on a target surface (208) 10 of the subject (114).

The application provides a quick assembly type projector, and belongs to the field of projectors, which comprises a host computer, a bottom plate and a mounting frame, the host computer comprises a machine body shell, a projection main body is movably connected to the side of the machine body shell, and heat dissipation grilles are evenly arranged on the side of the machine body shell, the design of the storage groove and the sealing cover plate enables users to conveniently store small objects such as remote controllers and prevents loss. In addition, the design of the power socket and the isolation cover plate ensures the safety of electricity use and avoids the entry of dust and sundries. Through the modular and standardized design concept, the projector realizes quick splicing and fixing between the host computer, the bottom plate and the mounting frame. Users can easily complete the assembly work of the projector without the help of professional tools, which greatly saves time and cost. Meanwhile, through the design of the adjusting motor and the steering top plate, users can conveniently adjust the projection angle and height to meet the use requirements in different scenes.