347 results about "Projection plane" patented technology

The application relates to the technical field of terminals, and discloses an electronic device and a cover. The electronic device comprises a cover, a display screen assembly and a main body. The cover is used for shielding a gap between the display screen assembly and the main body. The cover comprises a first part and a second part which are connected. The first part covers at least part of the edge of the display screen assembly. The second part extends from the first part towards the main body. The inside of the main body comprises an acoustic cavity, and the cover and / or the main body is provided with an acoustic outlet channel which is connected to the acoustic cavity and the outside of the mobile phone. The acoustic outlet of the acoustic outlet channel has an area greater than 0 in the region of the orthographic projection of the side projection plane. The side projection plane is perpendicular to the plane in which the display screen assembly is located and parallel to the edge of the display screen assembly corresponding to the acoustic outlet channel. The electronic device described above cannot be observed from the front, the acoustic outlet channel and the internal components cannot be observed, the appearance is improved, meanwhile, the size space of the display screen assembly can be increased, and the space utilization rate of the electronic device is improved.

The invention relates to the technical field of deep neural network training, and discloses a deep neural network training diagnosis method and system based on gradient visualization and loss curved surface analysis, and the method comprises the steps: obtaining a parameter snapshot of a neural network trained to t-th iteration, sampling k random detection vectors, and calculating a Hessian vector product; performing Lanczos iteration on each random detection vector to obtain k symmetric tridiagonal matrixes and calculating a characteristic value density spectrum; mapping the k symmetric tridiagonal matrixes into orthogonal projection base vectors, constructing a two-dimensional projection plane, determining a saddle point state according to the integral of the characteristic value density spectrum in a negative value region, determining a flat region according to the peak value of the characteristic value density spectrum in a zero value region, and determining a sharp minimum value according to the peak value of the characteristic value density spectrum in a positive value region; according to the method, the descending path with the steepest curvature can be captured, and the dominant mode of the dynamics can be optimized, so that the projected loss curved surface truly reflects the geometric structure change in the training process, and the pathological diagnosis of the training process based on the second-order geometric information is realized.

An endoscope includes a distal end member that is connected to a distal end side of an insertion part and that is made of a conductive material, and an insulating ring that is mounted on a base end side of the distal end member and that has an insulating property, in which the distal end member has a first region in which an observation window, an illumination window, and a treatment tool outlet port are disposed, and a second region that is provided on a base end side of the first region and on which the insulating ring is mounted, and in a case in which the first region and the second region are projected onto a projection plane perpendicular to a longitudinal axis of the insertion part, a maximum outer diameter of the second region is smaller than a maximum outer diameter of the first region.

The invention discloses an interactive projection system and method based on structured light perception and image anti-distortion, and relates to the technical field of interactive projection, and the method comprises a structured light perception module which is used for obtaining a projection plane depth image and an object image in a projection area; the projection modeling and object recognition module is used for constructing a change relation from a plane coordinate to a three-dimensional world coordinate according to the projection plane depth image, and recognizing object state data according to the object image; the image control and projection display module is used for determining an original image according to the object state data; the image anti-distortion processing module is used for performing pre-transformation processing on the original image based on the grid model and the projection device parameters to generate an anti-distortion image; and the image control and projection display module is also used for projecting the anti-distortion image to the projection area in real time. The interactive experience and the projection effect can be remarkably improved.

A large-scale point cloud-oriented two-dimensional regularized planar projection method and an encoding and decoding method are disclosed. The two-dimensional regularized planar projection method includes: obtaining original point cloud data; initializing a two-dimensional projection plane structure of a point cloud; and determining a mapping relationship between the original point cloud data and the two-dimensional projection plane structure to obtain a two-dimensional regularized projection plane structure corresponding to the point cloud. The encoding and decoding method includes: predicting based on the two-dimensional regularized projection plane structure of the point cloud to obtain to-be-encoded data; dividing the to-be-encoded data into a first type of to-be-encoded data and a second type of to-be-encoded data; and encoding different data in the first type of to-be-encoded data separately in a preset encoding manner, and correspondingly encoding the second type of to-be-encoded data, to obtain a geometric information bitstream.

There is provided a system and method for determining a three-dimensional model of an object using a projector and a light sensor arranged in a stereo configuration. The method including: receiving pixel intensity values captured by the light sensor for a plurality of images of a scene containing the object, wherein the images of the scene each capture different projection patterns emitted by the projector onto the scene; determining, using the pixel intensity values from a set of the plurality of images, correspondence between a projector plane and a camera plane to form a three-dimensional model of the object, the correspondence determined using a trained artificial neural network model that uses a combination of volume rendering and geometric representation; and outputting the three-dimensional model of the object.

A system for presenting digital effects in a head-wearable apparatus is provided. The system generates, by a digital effect application, one or more digital effects for presentation on a digital effect display component and receives, by the digital effect display component, the one or more digital effects, the digital effect display component. The system receives, by the digital effect display component from the digital effect application, positioning information for the one or more digital effects in three-dimensional (3D) space. The system configures, by the digital effect display component, a two-dimensional (2D) re-projection plane based on the positioning information received from the digital effect application and displays, by the digital effect display component, the one or more digital effects on the 2D re-projection plane.

The invention discloses an unmanned aerial vehicle image intelligent perception plotting method and system based on view GIS fusion. The method comprises the steps that a sequence image of a target area is collected through an unmanned aerial vehicle platform; target detection, classification and tracking are carried out based on deep learning, and target pixel coordinates are identified; constructing an intelligent mapping model from a pixel coordinate system to a geographic coordinate system to realize geographic positioning of a target; precise space calibration is carried out on the illegal target; and in combination with space calibration, interactive plotting and visualization of target illegal behaviors are realized at a WebGIS end, and a structured law enforcement evidence packet is formed. According to the method, the POS data and the visual information are deeply fused, the dynamic projection plane estimation technology is adopted, the geographic positioning precision better than that of a traditional method is achieved, the method has obvious advantages especially in complex environments such as urban areas, and high positioning precision can be achieved.

The present invention generally relates to a technology for recognizing objects in a Around View Monitoring (AVM) video for a vehicle. In particular, the present invention relates to a DNN-based object recognition method for multi-channel fisheye images of a vehicle AVM apparatus, by projecting multi-channel unit images of fisheye-lens cameras of the vehicle AVM apparatus onto a cylindrical projection plane so as to obtain multi-channel unit projection images, combining the multi-channel unit projection images on a single image so as to obtain a composite projection image, and inputting the composite projection image to a Deep Neural Network (DNN) model so as to obtain object recognition output. The invention has an advantage that AVM apparatus can effectively assist in safe driving by monitoring objects around the vehicle. Further, the present invention has an advantage that object recognition may be effectively achieved by the insufficient computing resources of vehicles.

The application relates to the whole vehicle arrangement technical field, in particular to a power system and a car. The power system comprises a driving motor, a transmission mechanism, an output mechanism, a generator, an engine and a flywheel. The driving motor has a first output shaft. The transmission mechanism comprises a transmission shaft, the transmission shaft is in transmission connection with the first output shaft and the output mechanism. The engine is in transmission connection with the flywheel. The first output shaft in the orthographic projection on the first projection plane and the transmission shaft in the orthographic projection on the first projection plane are both separated from the orthographic projection of the flywheel on the first projection plane, and the first projection plane is a plane perpendicular to the length direction of the engine. The generator has an input shaft, the input shaft is in transmission connection with the flywheel, and the orthographic projection of the input shaft on the first projection plane is located in the orthographic projection of the flywheel on the first projection plane. In this way, the compactness of the engine can be improved, the width of the power system is shortened, and the volume thereof is reduced.

Disclosed are a point cloud encoding and decoding method and device based on a two-dimensional regularization plane projection. The encoding method includes: acquiring original point cloud data; performing two-dimensional regularization plane projection on the original point cloud data to obtain a two-dimensional projection plane structure; obtaining a plurality of pieces of two-dimensional image information according to the two-dimensional projection plane structure; and encoding the plurality of pieces of two-dimensional image information to obtain code stream information.

This application discloses a method, apparatus, device, storage medium, and program product for screening face images, belonging to the field of face image screening technology. The method includes: acquiring multiple face images; detecting facial key points and target facial regions from the face images; calculating a first three-dimensional pose angle of the face images based on the facial key points; performing error compensation correction on the first three-dimensional pose angle to obtain a second three-dimensional pose angle; mapping the coordinates of the key points of the target facial region to a virtual projection plane when the face is facing the camera, based on the second three-dimensional pose angle, to obtain corrected coordinates of the key points of the target facial region; calculating state parameters of the target facial region based on the corrected coordinates of the key points of the target facial region; and selecting face images from the multiple face images whose target facial region state parameters satisfy a first preset condition and whose second three-dimensional pose angle satisfies a second preset condition, thereby obtaining a target image. According to the embodiments of this application, the accuracy and efficiency of the screening results can be improved.

Embodiments of the present disclosure relate to the technical field of computers, and provide a cylindrical surface detection method and apparatus. The method comprises: obtaining a plane detection result corresponding to point clouds to be detected; dividing approximately parallel planes in the plane detection result into plane groups; for each plane group, determining, from said point clouds, a point cloud set corresponding to the plane group and a projection plane corresponding to the point cloud set, wherein point cloud points in one point cloud set and an acquisition device configured to obtain said point clouds are located on the same side of the projection plane corresponding to the point cloud set, and the projection plane is a plane in the corresponding plane group; determining a target point cloud set and a target projection plane from the obtained point cloud sets and the corresponding projection planes on the basis of the projection point distribution of the point cloud sets on the corresponding projection planes; and detecting a target cylindrical surface on the basis of the target point cloud set and the target projection plane. In this way, the cylindrical surface can be detected from the point clouds, and high detection accuracy is achieved.

A device for storing and dispensing at least two cosmetic products comprises: a main body defining a first reservoir and a second reservoir; a first pump configured to be triggered along a first triggering axis; a second pump configured to be triggered along a second triggering axis parallel to the first triggering axis; a nozzle movably arranged relative to the main body and; and an applicator operable to move the nozzle relative to the main body parallel to the first triggering axis and the second triggering axis, from a resting position into a discharging position; wherein the applicator comprises: a pressing plate configured to be pressed by a user; a base plate configured for pushing the nozzle; and a stem portion fixed on one end to the pressing plate at a central region of the pressing plate, and fixed on the other end to the base plate, the stem portion extends in parallel to the first triggering axis and the second triggering axis; wherein the projected area of the pressing plate in a projection plane perpendicular to the first triggering axis and the second triggering axis is 20%-50% of the projected area of the base plate in the projection plane.

The utility model discloses a lens vibration eccentricity detection device relates to lens eccentricity detection technical field. The device includes: light source generator, is fixed in the horizontal surface of detection platform, and the object side of measured lens is fixedly connected with light source generator, projection plane is set up in the image side of measured lens, the projection plane is equipped with positioning figure, is used for the optical signal of light source generator and forms the projection on the projection plane through measured lens, camera, with projection plane opposite setting, is used for real -time shooting the image on projection plane, including the optical signal image of measured lens still time and the optical signal image of measured lens when being subjected to the vibration, terminal equipment is connected with camera, obtains the image of camera shooting, through comparing the optical signal image of measured lens still time and the optical signal image of measured lens when being subjected to the vibration, detects the eccentricity when the lens vibration.

Disclosed is a non-contact heart rate measurement method and device, the method comprising: acquiring a face video image of a to-be-measured object, and extracting a face skin region from each frame of the video image, and extracting a first color space vector based on the face skin region; projecting the first color space vector onto a projection plane of a predetermined color space to obtain a one-dimensional pulse signal; performing modal decomposition on the one-dimensional pulse signal to obtain a plurality of modal signals, the plurality of modal signals having at least different instantaneous frequencies and instantaneous amplitudes from each other, and performing signal recombination based on at least two of the plurality of modal signals to obtain a recombined signal; and obtaining an estimated heart rate based on the recombined signal.

The utility model relates to a workpiece fixing tool and a laser cutting machine, the workpiece fixing tool is used for the laser cutting machine, and the workpiece fixing tool comprises a fixing base and at least three positioning arms; the positioning arm is arranged on the fixed seat and extends along the height direction; a positioning target spot is formed at one end of the positioning arm away from the fixed seat; wherein in a projection plane perpendicular to the height direction, a connecting line of projections of any two positioning target spots is taken as a reference line, and at least another positioning target spot is located outside the reference line. By designing at least three positioning arms, positioning points with at least three positioning target points distributed and fixed on a workpiece with the bottom surface being an irregular curved surface are formed, any three positioning points can form a stable triangular supporting structure, the degree of freedom of translation and rotation of the workpiece can be eliminated, and positioning and supporting of the workpiece are achieved. The laser cutting machine provided by the utility model has the corresponding beneficial effects due to the adoption of the workpiece fixing tool.

The refrigeration equipment comprises a box body and a door body, the door body comprises a door body and a decoration plate assembly, the door body comprises vacuum glass, the decoration plate assembly is arranged on the side, away from the box body, of the door body, the decoration plate assembly comprises a door plate and a decoration strip, and the decoration strip is arranged on a projection plane perpendicular to the direction from the door body to the box body. The door plate and the decoration strip surround the vacuum glass, one side of the decoration strip is connected with the door plate through a connecting piece, and the other side of the decoration strip abuts against the vacuum glass. The decoration strip makes up various installation gaps, no matter what kind of errors are generated in the installation process, the decoration strip can fill the gaps through flexible adjustment, and therefore visual consistency of products in different installation environments is guaranteed, the attractiveness problem of a door body is remarkably solved, a more flexible installation mode is provided for a user, and the installation efficiency is improved. And the refrigeration equipment has higher competitiveness in the high-end market.

The invention discloses a dilution assembly and a blood analyzer, and relates to the technical field of detection.In the dilution assembly, a plurality of dilution cup grooves are formed in the top of a dilution plate; an accommodating space is formed in the accommodating shell, the accommodating shell comprises a supporting plate, and the diluting plate is arranged on the supporting plate; the dilution bottle is used for storing diluent, and the accommodating space is used for accommodating the dilution bottle; the first projection of the bottleneck of each dilution bottle on the target projection plane is not overlapped with the fourth projection of the dilution plate on the target projection plane, and the third projection of each dilution bottle on the target projection plane is partially overlapped with the fourth projection of the dilution plate on the target projection plane; the containing space and the dilution plate are sequentially arranged in the first target direction, and the dilution cup groove is located in the side, away from the containing space, of the dilution plate. Based on the mode, the space utilization rate of the dilution assembly can be improved.

An Artificial Intelligence Gaze Interface Sensor (AI GIS) system and method for precisely tracking human gaze on a digital or projected view plane without head-mounted hardware. A context camera detects a user's face and matches it against stored biometric profiles using AI facial recognition, automatically loading personalized eye geometry, inter-pupillary distance and gaze calibration data. A conditional activation controller initializes a second Peregrine Foveal Camera (PFC), modeled after the dual-fovea retina of the Falco peregrinus, only upon confirmed eye detection. An AI algorithm triggers visual effects, hidden content, animations, gaze-based engagements and semantically mapped audio on the digital or projected plane based on gaze coordinate outputs, from a dedicated computational pipeline, correlated to the digital or projected plane. This invention serves as the sensing layer for U.S. application Ser. No. 18 / 395,290.

At least one embodiment is directed to signaling at least one texture patch representing a texture value of at least one intermediate 3D sample, the texture patch being a set of 2D samples representing texture values of 3D samples of a point cloud orthogonally projected onto a projection plane along a projection line, and the at least one intermediate 3D sample being a 3D sample of the point cloud having a depth value greater than a nearer 3D sample of the point cloud and less than a farther 3D sample of the point cloud, the at least one intermediate 3D sample and the nearer and farther 3D samples being projected along the same projection line.

The utility model relates to the technical field of air conditioners, in particular to a side-blowing outdoor unit. The side-blowing outdoor unit comprises an axial flow impeller, a flow guide ring and a flow guide ring; the flow guide ring surrounds the air outlet side of the axial flow impeller, an air inlet and an air outlet of the flow guide ring are both in a horn shape, the flow guide ring is arranged on the air outlet side of the flow guide ring, the cross section of the flow guide ring is in an arc shape, and the concave side of the flow guide ring faces the flow guide ring. The projection of the inner edge of the flow guide ring on the target projection surface is a first projection, the projection of the inner wall of the narrowest part of the flow guide ring on the target projection surface is a second projection, the first projection is located on the periphery of the second projection, and the target projection surface is perpendicular to the axis of the axial flow impeller. According to the side-blowing outdoor unit provided by the utility model, the air outlet side of the flow guide ring is provided with the flow guide ring which meets specific requirements, so that the turbulence of airflow near the air outlet of the flow guide ring can be inhibited, the efficiency of the motor can be improved, and the noise can be reduced.

The invention belongs to the technical field of underwater sound channels and physical fields, and relates to a numerical mixing calculation method for a forward scattering sound field of an underwater regular-shape object. The method comprises the following steps: acquiring an initial projection contour of a three-dimensional geometric model of a regular shape object in a specified projection plane and an incident direction; discrete points of the initial projection contour are divided into upper boundary points and lower boundary points; performing interpolation completion on the upper boundary points and the lower boundary points, so that the upper boundary points and the lower boundary points are the same in number and share abscissas; discretizing the supplemented projection contour by using a trapezoidal plane element; calculating a forward scattering far field morphological function based on a discretization result; and calculating the forward scattering target intensity of the object. The method provided by the invention can cover the shape range of the scattering object suitable for the analysis method, does not need to calculate special functions such as Bessel and spherical harmonic and a complex series expression formed by combining the special functions, and obviously improves the calculation efficiency.

An information processing apparatus includes a processing unit configured to create first two-dimensional data based on a first three-dimensional point cloud and a projection plane and create second two-dimensional data based on a second three-dimensional point cloud and the projection plane, and a registration unit configured to register the first three-dimensional point cloud and the second three-dimensional point cloud through relative movement of the first two-dimensional data and the second two-dimensional data.

This application discloses a rotation angle measurement device and method for a MEMS array, relating to the field of MEMS measurement. The device and method include: a laser light source disposed on one side of an optical platform; an optical platform for placing and moving the MEMS array; a projection plane disposed above the other side of the optical platform and capable of moving up and down; an industrial camera disposed in correspondence with the projection plane; a control unit connected to the optical platform, the MEMS array, and the industrial camera; and a control unit connected to the optical platform, the MEMS array, and the industrial camera. The control unit rotates the mirror to be measured in a certain direction by changing the voltage of the pin corresponding to the mirror to be measured in the MEMS array. The control unit also controls the industrial camera to capture an image of the projection plane and mark the coordinates of the light spot on the image, thereby determining the correspondence between different pin voltages and the light spot coordinates, and ultimately plotting a voltage-angle response curve. This application does not require precise calibration of the angle of the incident light and can automatically and accurately measure the rotation angle of the MEMS array even when the angle of change is very small.

The present technology provides an illumination device including a light source section, a phase modulation section, and a control section. The light source section has a light emitting element. The phase modulation section performs spatial light phase modulation on incident light from the light source section. The control section controls the phase modulation section so that a plurality of domains formed by dividing a phase modulation plane of the phase modulation section reproduce, in a common area on a projection plane, a light intensity distribution based on a common phase distribution determined based on a free-form method.

The invention relates to the technical field of projectors, and discloses a picture calibration method and device, a projector and a medium. The method comprises the following steps: acquiring attitude angle information and positioning and orientation information of a projection lens; the positioning and orientation information represents distances and directions of the projection lens relative to at least three non-collinear reference points in a projection plane; determining three-dimensional included angle information between the projection plane and the optical axis of the projection lens based on the attitude angle information and the positioning and orientation information; performing angle calculation on the LCD screen based on the three-dimensional included angle information so as to calculate a target pitch angle value and a target deflection angle value which the LCD screen needs to reach; and driving the screen adjusting component to adjust the angle of the LCD screen by taking the pitch angle and the deflection angle of the LCD screen respectively reaching the target pitch angle value and the target deflection angle value. According to the embodiment of the invention, the projection picture quality of the single-chip LCD projector during side projection can be improved.

The present application relates to the technical field of projectors, and specifically provides a kind of intelligent projector control method based on color correction and depth correction, image and depth information of projection plane are collected by optical perception device, and color deviation tensor and depth deviation tensor between it and ideal plane are calculated, color correction and depth correction are carried out on pre-projection image according to color deviation tensor and depth deviation tensor, so that projected image will not be affected by color and flatness on projection plane.The present application avoids color interference and flatness influence of projection plane, ensures that projector can realize flat, achromatic projection under visual effect in extreme conditions such as plane and space irregularity, color stain and the like, and solves the problems such as precision limitation, single scene and high cost in existing projection mapping application.

The application relates to the technical field of CAD model processing, in particular to a triangular mesh quality optimization method and system based on local reconstruction, which comprises the following steps: acquiring a triangular mesh, and screening a first triangular mesh to be optimized based on a preset regularity; performing basic topological adjustment on the first triangular mesh to be optimized, and obtaining a second triangular mesh to be optimized; acquiring a first local neighborhood mesh of the second triangular mesh to be optimized, moving the vertexes of the triangular mesh in the first local neighborhood mesh, and obtaining a third triangular mesh to be optimized; acquiring a second local neighborhood mesh of the third triangular mesh to be optimized and a projection plane of the second local neighborhood mesh, determining a layout triangle according to the area of the projection plane and a target side length, and mapping the layout triangle to the second local neighborhood mesh. The application can optimize the quality of the triangular mesh on the basis of retaining the original geometric characteristics of the triangular mesh, and greatly improve the calculation efficiency of the triangular mesh optimization.

The application relates to a gesture recognition method, an electronic device, a gesture recognition system and a storage medium. According to three-dimensional posture information of a target object, a projection plane of at least one side of the trunk on the left and right sides of the target object is constructed, and a pointing vector of at least one hand of the left and right hands is determined. A spatial position relationship between the pointing vector of a first hand and the projection plane of a first trunk is determined, the first hand being the hand closest to the first trunk among the left and right hands. Whether the first hand is in a pointing state is determined according to the spatial position relationship, the problem that left and right hand pointing gestures cannot be accurately distinguished in the related art is solved, and left and right hand pointing gestures are independently and in parallel recognized.