109 results about "3D projection" patented technology

A digital elevation database is compressed to create a compressed digital map database which is used by a digital computer system for displaying three-dimensional terrain data in the form of polygons. The compressed digital map database is produced from a database of elevation points by selecting every mth row and every nth column, thereby resulting in a reduction of database storage requirements. During program run-time the intersection of rows and columns forms cells with four corners. The elevation value of a center elevation point for each cell is formed by various methods, thereby creating a cell made up of four three-dimensional triangles. One method for creating the elevation of the center elevation point uses the elevations of the four corners of the cell. Another method uses extrapolated elevation values from the cell's extended diagonals. The three-dimensional triangles formed from the center elevation point are then transformed and projected using standard computer graphics methods on a digital computer to produce a three-dimensional projected display.

IVR-CT apparatus has an angio-image obtaining unit, an angio-image imaging direction obtaining unit, a CT-image obtaining unit, a blood vessel part extracting unit, a projected image generating unit and a display control unit. The angio-image obtaining unit obtains a required angio-image from multiple chronological angio-images. The angio-image imaging direction obtaining unit obtains a direction of imaging as incidental information included in data on the required angio-image. The CT-image obtaining unit obtains a three-dimensional CT-image corresponding to the required angio-image. The blood vessel part extracting unit extracts a blood vessel part in the three-dimensional CT-image. The projected image generating unit generates a three-dimensional projected image by projecting the blood vessel part, and a three-dimensional projected image corresponding to a direction of a projection after a manual operation operates the direction of the projection. The display control unit makes display the three-dimensional projection image and the angio-image one over another.

An image projection system for displaying information for observation by at least one viewer of an event by projecting the information onto a venue structure or a game associated object, that comprises a projection device; an image projected by the projection device for observation by the viewer, and a projection surface that receives the image The image may be any type of communication such as an advertisement of a product or service or any other type of information that can be communicated to an observer of the image. The image is projected onto either an existing component of a venue structure or an event associated object.

The invention relates to the field of artificial intelligence. The embodiment of the invention provides a method and device for detecting a target object in an image. The method comprises the following steps: executing the following prediction operations by using a pre-trained neural network: detecting a target object in a two-dimensional image, and determining a two-dimensional bounding box of the target object; determining a relative position constraint relationship between the two-dimensional bounding box of the target object and a three-dimensional projection bounding box obtained by projecting the three-dimensional bounding box of the target object into the two-dimensional image; and determining a three-dimensional projection bounding box of the target object according to the two-dimensional bounding box of the target object and the relative position constraint relationship between the two-dimensional bounding box and the three-dimensional projection bounding box of the target object. According to the method, the accuracy of target object position detection is improved.

An image processing method and system using the same, wherein the image processing method includes capturing a plurality of images corresponding to the surroundings of an object using a plurality of image capturing modules to generate a two-dimension planar image; providing a three-dimension projected curved surface; defining a plurality of first grids on the three-dimension projected curved surface and a plurality of second grids on the two-dimension planar image, wherein each of the first grids correspond to each of the second grids; transforming the first grids on the three-dimension projected curved surface and the second grids on the two-dimension planar image into a plurality of first redrawn grids and second redrawn grids respectively based on the angles formed between the normal vector of the two-dimension planar image and the normal vector of each first grid, wherein each first redrawn grid corresponds to each second redrawn grid.

The invention discloses a three-dimensional projection display system based on liquid crystal polarization rotation, which solves the problem that an existing three-dimensional projection display system particularly needs two projectors to respectively project images at a left view angle and a right view angle, and consequently is complicated in adjustment. The three-dimensional projection display system comprises a light source, a beam shaping and shimming device, a projection display chip, a liquid crystal polarization rotator, a sequential control circuit, a projection lens, a projection screen and watching glasses with two lenses in orthogonal polarization analysis directions. The three-dimensional projection display system is capable of realizing three-dimensional projection with a single projector, simple in structure, high in stability, low in cost, fine in three-dimensional effect and applicable to three-dimensional projection display for movie theaters and home entertainment.

The invention relates to a human-computer interaction system and an interaction method applied to fitness equipment. The human-computer interaction system further comprises a holographic projection device and a motion posture acquisition device. The sports posture collecting device is used for collecting the sports posture of the athlete when running or walking on the conveyor belt of the fitnessequipment; the acquired motion posture is displayed by holographic projection device in three-dimensional projection. A method for man-machine interaction includes verifying that identity informationof an athlete by a fitness apparatus, to obtain physiological data of athletes, according to the obtained physiological data. A motion posture of a mover is captured and presented on a holographic projection device, The invention sets different motion scenes according to the input physiological data and presents the different motion scenes through a holographic projection device, so as to help theathlete enter the exercise state quickly and improve the fitness effect of the athlete. The invention can effectively help athletes into the best state of exercise so as to enhance the sports experience.

The invention belongs to the technical field of computer software and discloses a 3D map scatter data display method and system as well as an information data processing terminal. A 3D stereoscopic graph is created in a plane in a 2D graphic mode and a 3D space mode by use of visual difference and optical diffraction; an object is made to be rendered to a webpage, and the object is enabled to looksmall in the distance and big on the contrary in a 3D projection manner; in the photographing principles, an included angle in the view point of a camera is set, so that the displayed object moves relatively; the influence degree of independent variables and dependent variables is judged with a binary variable analysis and statistic method and a partial correlation analysis method, and the independent variable with higher influence is reserved; data are mapped to a corresponding axis by use of scale with an airline data visualization method, progressive increase is performed at a regular timeunit with a circular rendering method, so that data dynamically change. Three 3D scenes can be created, and the cool 3D effect is sufficiently shown.

The invention provides a lane line positioning method and device, electronic equipment and a readable medium. The method comprises the steps of obtaining multiple pieces of two-dimensional point information of a lane line through an image; determining a plurality of coordinate conversion equations according to the three-dimensional projection relationship and camera parameters; performing parameter estimation on the coordinate transformation equation based on the plurality of pieces of two-dimensional point information to obtain a two-dimensional offset parameter of the vehicle; and positioning the lane line according to the two-dimensional offset parameter. According to the lane line positioning method and device, the electronic equipment and the readable medium, when lane line detectionis inaccurate, the high-precision included angle of the vehicle body relative to the lane line and transverse deviation of the vehicle body in the lane can still be obtained, so that the lane line isaccurately positioned.

The invention discloses a virtual ocean roaming system based on cognition interactive technique and the operation method, belonging to virtual ocean roaming technique. The system comprises data control server, simulation thrash machine and level control board. The whole system is fixed on rubber floor, the left side is data control server and right side is virtual server. The spherical cap three-dimensional motion device is installed on aluminum plastic board, and is equipped with vertical motion orbit and horizontal motion orbit, one stainless steel board with strengthened keel is connected with orbit directly, and the servo generator on the vertical and horizontal motion orbit can drive stainless steel board to move vertically. The simulation thrash machine is fixed on one side of steel board, horizontal control board is located in the middle of steel board, and the spherical cap three-dimensional projection screen and projecting apparatus are fixed on the other side of steel board. The invention is characterized by simple structure, convenient operation and low cost.

The invention belongs to the technical field of three-dimensional point cloud processing, and particularly relates to an orchard inter-line navigation line extraction method based on 3D Lidar. The method is suitable for automatic walking of an operation machine tool. The method comprises the following steps: S1, collecting three-dimensional original point cloud data between lines of a target orchard; s2, preprocessing the three-dimensional original point cloud data; s3, performing Euclidean clustering; and S4, tree line fitting and navigation line generation. According to the method, the midpoint of the three-dimensional projection of the trunk is used for replacing the position of the trunk, trunk positioning between orchard lines is achieved, then the navigation line is extracted, and the method has the advantages of being small in operand, high in real-time performance, small in environmental interference, high in precision, high in robustness and the like.

The invention discloses a naked eye 3D (Three-Dimension) projection system, and relates to the field of display, in particular to the field of 3D display. The projection system comprises a projection system part, a projection screen, and a micro-processor system connected with the projection system part, wherein the projection screen adopts a naked eye 3D projection screen. The naked eye 3D projection screen comprises at least two display arrays, namely a first display array and a second display array. Emission directions of light of different pictures displayed on the first display array and the second display array are adjusted by a light direction modulation mechanism, so that the light of the different pictures is irradiated to left eyes and right eyes of audience. And an image with a 3D effect in front-back, up-down, left-right and far-near directions is formed by utilizing a fact that a left eye and a right human eye receive different pictures respectively and then a human brain performs image information overlapping and regeneration.. With the adoption of the design, the projection system with a naked eye 3D display effect can be achieved.

A 3D image projection system has a display screen having an array of pixels, an array of pixel pyramids associated with the array of pixels, and a projector configured to project light onto the display screen.

The invention provides a naked eye 3D implementation method. The method comprises the steps of obtaining a 2D image, and splitting the 2D image into a background role and a foreground role; carrying out hierarchical processing on the image data obtained after splitting processing, and carrying out basic 3D projection on the image data obtained after hierarchical processing within a set size in a naked eye 3D camera angle coverage range; performing detail repair processing on the image data obtained after basic 3D projection by using OPEN CL 3D; and performing image calculation of 16 channels of the naked eye 3D image on the image data subjected to detail repair processing by using an Open CL multi-rendering mechanism to obtain the naked eye 3D image. By applying the method provided by the embodiment of the invention, the limitation of the existing 3D process can be overcome, and the effective naked eye 3D image can be manufactured. Strength of the workstation can be utilized to the maximum extent, and feasibility of technicians in controlling and managing all things in the workstation is achieved under the condition that additional renderers and procedures are not used.

The invention relates to a 3D projection system and a 3D projection method in a 3D space environment. The projection system comprises a projection unit, a picture storage unit, a 3D image processing unit and a projection image processing unit, wherein the projection unit is used for projecting an image; two or more surfaces, on which the projected image is mapped, exist in a projection display area formed by the projection unit, wherein at least two surfaces are intersected surfaces, the intersection angle of which relative to an watcher is less than 180 DEG; the picture storage unit is used for storing pre-set projection application pictures corresponding to various surfaces; the 3D image processing unit is used for generating 3D image projection pictures according to the pre-set projection application pictures, wherein the parallaxes of at least one part of pictures in the 3D image projection pictures are negative parallaxes and/or positive parallaxes; the projection image processing unit is used for processing the 3D image projection pictures, such that pictures for performing graphic correction based on various surfaces are formed and then projected through the projection unit; 3D projection images having expected effects and matched with various surfaces are formed in the projection display area; and thus, users can easily obtain 3D projection figures.

The invention discloses a camera calibration method based on human body posture estimation in a large scene. The method comprises the following steps: 1, obtaining initial camera parameters of each camera; 2, collecting a multi-person data set in a multi-view camera environment for optimizing initial camera parameters; 3, predicting human body joint point information in the data set; 4, projectingthe human body two-dimensional articulation points under multiple view angles by using the initialized camera parameters, projecting pixel coordinates under a two-dimensional image coordinate systemto a world coordinate system to obtain three-dimensional coordinates of the articulation points, and normalizing the three-dimensional projection of the same articulation point; and 5, reprojecting the three-dimensional space coordinates of the articulation points into an image coordinate system under each visual angle to obtain true values of the articulation points and mean square errors betweenthe reprojected articulation points, performing nonlinear secondary optimization by utilizing an LM algorithm, and updating camera parameters until the mean square errors reach a set threshold value.The method provided by the invention can realize more accurate camera calibration.

The invention discloses a method for quickly positioning feature information based on three-dimensional projection. The method is implemented by using a visual sensor provided with a camera and a projector, and the visual sensor is fixed at the tail end of a robot or fixed on a station where a to-be-measured object is located. The method comprises the following steps: 1) determining three-dimensional coordinates of a feature mark point in a coordinate system of the to-be-measured object based on standard data; 2) transforming the coordinates of the feature mark point in a projector coordinatesystem through a transformation relationship of the coordinate system of the to-be-measured object-robot coordinate system-sensor coordinate system-projector coordinate system, or through the transformation relationship between a sensor coordinate system of a sensor with a fixed location and the coordinate system of the to-be-measured object; and 3) mapping three-dimensional coordinates onto a projection plane according to the imaging projection principle, obtaining two-dimensional coordinates, generating a projection picture, and projecting the projection picture on the surface of the to-be-measured object to assist manual point attachment. According to the method, no process card is used, the artificial influence can be effectively eliminated, less time is consumed, and the accuracy is high.

The invention discloses a zoom camera attitude calibration method and system based on a rectangular structure, and belongs to the technical field of image processing. The method comprises the following steps: acquiring pixel coordinates of four corners of a rectangle, solving the segmentation proportion of the diagonal lines of the quadrangle according to the pixel coordinates of the four corner points, solving the focal length of the camera according to the rectangular vertical relation, solving corresponding physical coordinates of four corners of the rectangle on a normalized imaging plane,solving three-dimensional projection coordinates according to the physical coordinates of the four corners of the rectangle, solving a rotation matrix R, and reprojecting the image where the deformedrectangle is located to obtain a corrected image where the corrected rectangle is located. According to the method and the system, only rectangular image information is needed, rectangular physical size information is not needed, under the condition that the size of a rectangular object is not easy to know, the focal length of the zoom camera can be solved, camera attitude calibration and reprojection can be carried out to obtain a corrected image, and compared with a traditional algorithm, the method has wider applicability.

The embodiment of the invention discloses an ultrasonic imaging method, and the method comprises the steps: obtaining first volume data corresponding to a target tissue, and selecting two-dimensionalsection data from the first volume data; mapping the two-dimensional section data to a three-dimensional projection coordinate system to obtain three-dimensional two-dimensional section data; obtaining a rendering image of second volume data corresponding to the target tissue; obtaining a three-dimensional segmentation result of the three-dimensional two-dimensional section data based on a three-dimensional projection coordinate system; performing fusion processing on the three-dimensional two-dimensional section data, the rendered image of the second volume data and the three-dimensional segmentation result to obtain a fused image; and displaying fused images.

The invention provides a three-dimensional roadway model building method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining roadway modeling data, determining a roadway three-dimensional center line which is a geometric center line of a roadway under three-dimensional projection according to the roadway modeling data, and processing the roadway modeling data according to the roadway three-dimensional center line, and generating a three-dimensional roadway model. According to the method, the automation and intelligence degree of three-dimensional roadway model building can be effectively improved, resource consumption in the model building process is reduced, and the model building convenience and effect are improved.

There is provided a three-dimensional (3D) projection system including a diffraction element having a grating pattern and a plurality of projectors that project light having image information onto the diffraction element. The diffraction element displays a 3D image at multiple viewing points by adjusting a light exit direction based on an incident angle of the light projected by each of the plurality of projectors at the grating pattern.