461results about How to "Strong sense of reality" patented technology

The invention discloses a three-dimensional virtual human head image generation method, and a method and a device of human head image motion tracking, and belongs to the field of image processing. The three-dimensional virtual human head image generation method comprises collecting a human face picture, obtaining feature points on the human face picture, wherein the feature points are used for showing a left eyebrow, a right eyebrow, a left eye, a right eye, a nose, the edge contour of a human face and a forehead portion of the human face; obtaining a personalized three-dimensional human face model according to the obtained feature points and a preset standard human face model; and carrying out texture mapping to the personalized three-dimensional human face model, and generating a three-dimensional virtual human head image. Due to the facts that the feature points which are used for characterizing feature information of the human face on a single human face picture are obtained, and are applied in the three-dimensional human face model, and the personalized three-dimensional human face model which includes the forehead portion and is good in third dimension is generated, the three-dimensional virtual human head image generation method, and the method and the device of the human head image motion tracking have the advantages of being in no need of manual marking of the feature points, greatly reducing manual processing amount, being applicable to modeling occasions which require for simpleness and speediness, and being capable of enabling the third dimension of the generated three-dimensional human head image to be greatly improved and to be high in accuracy due to the fact that the feature points include feature points of the forehead portion of the human face.

The invention discloses a daily makeup design method and a system based on face feature region recognition. The method includes inputting a digital picture of a figure obtained through local uploading or shooting of other tools such as a camera; performing processing such as proper tailoring, zoom and rotation on the digital picture; automatically recognizing and extracting a face feature region from the picture; performing makeup operation on the recognized face feature region through a makeup design system; previewing the whole effect after the makeup, performing local adjustment on unsatisfied makeup; prompting parameters of cosmetics used by the makeup to find a corresponding relation of the parameters with real cosmetics when the design is finished; and saving the current makeup effect and makeup strategies. The daily makeup design method and the system have the advantages that the operation is convenient, the practicability is high, the makeup display effect is good, the operational process accords with makeup design mentality of users, the user experience is good, and the design method and the system are worth widely popularizing and using.

The invention discloses a full view generating method of a sequence static picture for splicing a group of static pictures to a cylindrical full view picture. A group of static pictures are twelve or more than twelve pictures that the digital camera takes the object or the environment of the needed generating full view picture from the different angle. The method comprises the following steps: taking the sequence pictures; preprocessing the taken pictures; splicing the pictures. The method needs the low hardware device and doesn' t need the expensive hardware investment, which provides the quick resultant velocity, the high intellectual degree, and can display the full view pictures.

The invention relates to a point cloud data based single tree three-dimensional modeling and morphological parameter extracting method. The point cloud data based single tree three-dimensional modeling and morphological parameter extracting method comprises obtaining three-dimensional surface point cloud data of high density standing trees through a three-dimensional scanner or other live-action measuring modes, calculating the shortest distance from points to root nodes through a k-nearest neighbor graph, performing hierarchical clustering on the data according to distance, enabling centers of clustering hierarchies to be served as framework points of a limb system and meanwhile extracting corresponding semi-diameter of the framework points; connecting the framework points to establish a topological structure of branches and grading the branches; performing three-dimensional geometrical reconstruction on branches through a generalized cylinder body; adding leaf models to the limb system to form into a vivid three-dimensional single tree model; extracting height of trees, diameter of breast height and crown breadth of the standing trees in the point cloud. The point cloud data based single tree three-dimensional modeling and morphological parameter extracting method can rapidly and semi-automatically extract tree important geometrical parameters and topological information to form into the high vivid single tree geometric model and has wide application prospects and values in fields such as agriculture and forestry survey, ecological research and landscape planning.

The invention discloses a single-photo-based human face animating method, which belongs to the field of graph and image processing and computer vision. The method is to automatically reconstruct a three-dimensional model of a human face according to a single human front face photo and then to drive the reconstructed three-dimensional model to form personal human face animation. The method uses a human three-dimensional reconstruction unit and a human face animation unit, wherein the human face three-dimensional reconstruction unit carries out the following steps: generating a shape-change model off-line; automatically positioning the key points on the human faces by utilizing an active appearance model; adding eye and tooth grids to form a complete human face model; and obtaining the reconstruction result by texture mapping. The human face animation unit carries out the following steps: making animation data of far spaced key points; mapping the animation data onto a target human face model by using a radical primary function; realizing motion data interpolation by using spherical parametrization; and generating the motion of eyes. The method has the characteristics of high automation, robustness and sense of reality and is suitable to be used in field of film and television making, three-dimensional games and the like.

The invention relates to a method for implementing realistic game, which comprises the following steps of: (1) establishing a human body skeleton model; (2) establishing a game movement library under an offline state, establishing movement libraries respectively according to game items, and performing multi-frame movement decomposition on a single semantic movement;(3) calibrating a binocular camera to acquire parameters of the binocular camera and polar calibration; (5) background modeling; (6) selecting an interactive characteristic label; (7) foreground partitioning; (8) initializing the information of the characteristic label; (9) detecting human face and skin color; (10) multi-target tracking; (11) completing sparse stereo matching; (12) acquiring a 3D skeleton; and (13) matching with the movements in the offline movement libraries to realize movement recognition, combining single-frame image analytic matching with multi-frame image analytic matching to obtain the semantic movement, transferring the semantic movement to a game executing unit to implement the function of realistic game. Being stronger in interactivity and reality as well as simpler and more convenient in operation, the method of the invention is a game implementation method with low cost and is more suitable for being extensively accepted by general people.

The invention discloses a 3D laser printing method and system. A four-parameter continuous modulation laser printout method is adopted to prepare a 3D image consisting of diffraction pixels arranged according to the position coordinates and provided with both a specific grating space frequency and an angle of orientation; the modulation method of parameters of grating stripes in the diffraction pixels is realized on the basis of a 4F imaging system and a diffraction grating; the 4F imaging system comprises a first Fourier transformation lens or lens group and a second Fourier transformation lens or lens group; the diffraction grating is placed between the first Fourier transformation lens or lens group and the second Fourier transformation lens or lens group; the distance between the diffraction grating and the first Fourier transformation lens or lens group is changed to realize continuous modulation of the space frequency of the grating stripes; and the diffraction grating is rotated to realize continuous modulation of the grating orientation angle of the grating stripes. The 3D laser printing method and system realize continuous adjustment of the space frequency and the orientation of the grating, and encodes on the basis of the four-parameter micro-nano structure with continuously changeable space frequency and orientation of the grating to form a 3D color image.

The invention provides a device and method integrating gesture recognition and ultrasonic tactile feedback. The device integrates a functional unit comprising a camera, an illumination unit and an ultrasonic spray head assembly inside gloves, feeds back the hand operation in real time, achieves accurate identification and tracing to the hand actions of a user and converts tactile information fed back into forces or force moments directly acting the hands of the user, so that an operator can produce a real touch feeling in a virtual environment, and meanwhile touch feeling at multiple angle and strengths can be also simulated, the gesture recognition speed and accuracy are improved, and the fidelity and immersion degree of virtual reality experience are increased. The invention also relates to application of the device integrating gesture recognition and ultrasonic tactile feedback in virtual reality, augmented reality and mixed reality.

The invention relates to the field of photogrammetry and surveying and mapping, particularly to a digital mapping method and system based on a live-action 3D model. Digital mapping is carried out by unmanned aerial vehicle oblique photography 3D modeling and cooperation with a ground survey robot, digital mapping of the data acquisition result is more portable and flexible, at the same time high resolution live-action 3D model data can be acquired, and the sense of reality is strong. A control point coordinate acquired by the ground survey robot can effectively control the overall accuracy of the model, an acquired feature point coordinate can effectively compensate for the defect of low coordinate precision because of the influence of a barrier object on unmanned aerial vehicle aerial photography modeling. The method and system provided by the invention have greatly improved work efficiency, also can acquire vivid 3D topographic and geomorphic data at the same time, and meet the demand for diversified data results.

The invention provides a real-time fire effect simulation method based on a GPU (Graphics Processing Unit). The method comprises the following steps of: generating and updating a particle system through a CPU (Central Processing Unit), and obtaining the updated particle system; rendering corresponding point sprites of all the particles in the updated particle system, and obtaining the rendering result of the corresponding point sprites of all the particles. The method implements the simulation and rendering process of the real-time rendering fire effect, thereby obtaining the vivid fire effect in the real-time environment.

The invention relates to a 3D virtual community construction method based on panoramic and real image and geographic information. The method comprises the following steps: establishing a virtual community structure; establishing a virtual community display platform through three procedures, including the first procedure of creating a virtual space based on a scene display outer curtain, creating a virtual ground and setting a wandering mode of a user on the virtual ground; the second procedure of adding a 3D entity on the virtual ground and the third procedure of synchronizing the virtual space and the geographic information of the real world; obtaining a virtual community based on panoramic and real image and geographic information; and enabling the environmental interaction of users in the virtual community and the interaction of a current user and other users. The inventive method increases the virtual community scene construction efficiency, improves the realistic effect, ensures the scene of the virtual community consistent to the scene of the real community, allows the user in the virtual space to not only enjoy the environment of the real world but also know the current geographical location, and enhances the realistic effect of the virtual community.

The invention provides a depression risk screening system and method based on a virtual reality scene electroencephalogram signal. Under the stimulation of a virtual reality scene, real-time acquisition, processing and analysis of data are carried out on the electroencephalogram signal by an electroencephalogram acquisition system, and finally, a depression risk is screened by a data mining method. The system provided by the invention comprises a virtual reality induction system, a electroencephalogram signal acquisition system and a data analysis system; the virtual reality induction system is used for establishing different virtual reality scenes; the electroencephalogram signal acquisition system is used for acquiring the electroencephalogram signal of a human brain, which is generated under the stimulation of the virtual reality scene and is continuously changed, and outputting the processed electroencephalogram signal and extracted real-time feature information; the data analysis system has a classification discrimination model trained by labeled healthy populations and depression risk populations, compares feature information required in a depression screening process with feature parameters of the classification discrimination model, and distinguishes and discriminates the healthy populations and the depression risk populations.

The invention relates to a simulation system of loading and unloading operation processes in pressurized water reactor (PWR) nuclear power plants. The system comprises an LED (light emitting diode) display screen, a touch screen, an operation control table consisting of a component part consisting of a button, a switch, an operating rod, an indicator lamp and an alarm, an information communication and processing device consisting of a programmable logic controller PLC (programmable logic controller) and a PC graphic workstation, a display device consisting of a scene display and a camera, and an industrial personal computer. The simulation system of the loading and unloading operation processes is designed in strict accordance with functions of real loading and unloading machines, is featured with rich simulated objects, reliable simulation data and strong reality, simulates various common abnormal states or failure states, allows interactive operation, clears faults and has a component showing function; the touch screen has an interface control function; the system simplifies layout of an operation table, expands subsequent functions, effectively trains loading and unloading operators and is widely applied to nuclear power stations and related analogue simulation systems.

The invention discloses a simulation system for dynamically generating a three-dimensional scene on the basis of Unity. The simulation method comprises a three-dimensional simulation model library, a scene configuration file library, a three-dimensional simulation module and a data communication module, wherein the three-dimensional simulation module comprises a scene display module and a scene operation module; and the output end of the three-dimensional simulation model library and the output end of the scene configuration file library are connected with a data input end of the scene display module. The implementation method of the simulation system comprises the following steps: 1) creating a three-dimensional model; 2) reading a user-defined configuration file from the Unity, and automatically generating the three-dimensional scene simulation module; 3) newly building a monitoring thread in the three-dimensional scene simulation module, and obtaining required external real-time data from an external equipment simulation program; and 4) operating equipment or repairing equipment faults in a three-dimensional scene, and sending operation information to the external equipment simulation program for simulation calculation and judgment. The simulation system has the advantages of being visual in observation, can receive and send simulation data in real time and is tightly combined with actual power system communication work.

The invention discloses a semi-inverse method-based rapid single image dehazing algorithm, which comprises the following steps: In light of an atmospheric scattering model, working out an atmospheric global illumination value by utilizing an improved semi-inverse algorithm, wherein the robustness of the obtained atmospheric global illumination value is stronger than that of the maximum gray value in a dark channel; secondly, fusing the edge information and the scene depth information of an image upon the characteristic of atmospheric scattered light by taking the edge information of the image as a synthesis condition, and accurately estimating an atmospheric streamer; then, obtaining an initial restored haze-free image according to the atmospheric scattering model; finally, performing color adjustment and detail enhancement processing on the image after being initially dehazed to obtain a haze-free image with strong sense of reality. The semi-inverse method-based rapid single image dehazing algorithm has a very good processing effect on depth mutation or prospect pixels, so that a vignetting effect is eliminated; shown by a large number of experiments, the semi-inverse method-based rapid single image dehazing algorithm disclosed by the invention is capable of well keeping color and detail information, is better in automaticity and robustness, and can be further used for a video dehazing system.

The invention relates to an immersive three-dimensional rendering projection system and method for a moving view point on a curved screen. The method is based on an immersive three-dimensional rendering projection system for a moving view point on a curved screen. The method comprises the following steps: acquiring user information: tracking user's head position and posture information, and estimating user's binocular positions and sight direction; setting three-dimensional rendering parameters: according to the estimated user's binocular positions and sight direction, adjusting a three-dimensional camera in real time to perform three-dimensional rendering of the moving view point on the parameters; performing dynamic parallax adjustment: performing post processing on the parallax of the rendered three-dimensional image according to the relative position relation between the user and the screen and the geometric shape information of the projection screen, so that the user views comfortable and correct three-dimensional images at his position; optimizing user perception: for user's head posture and eyeball movement, further optimizing the image respectively after the dynamic parallax adjustment; and projecting a three-dimensional scene: watching a virtual roaming three-dimensional scene by the user wearing a pair of three-dimensional glasses.

The invention relates to the field of computer graphics, and discloses a method and system for building a three-dimensional model. By extracting three-dimensional point cloud data of a building in an image sequence; generating a texture map of a building model; and analyzing the three-dimensional point cloud data Perform denoising processing; remove redundant 3D point cloud data based on the plane geometry of the position information data; calculate the optimal convergence of constraints in the image overlay model, segment the foreground layer from the background layer in the image, and use a solid color for the foreground layer Shading; generating 3D models of buildings. The three-dimensional reconstruction of the building by the point cloud data in the embodiment of the present invention has real three-dimensional information and pixel information, the reconstructed three-dimensional building model has a stronger sense of reality, and the restored geometric information is more complete and more accurate.

The invention discloses a method of viewing a 3D digital building by using virtual reality goggles. The method comprises the following steps: 1, 3D modeling software is used for making a 3D model, and a scene is built; 2, two cameras of two eyepieces of the virtual reality goggles are rendered; 3, the virtual reality goggles and a 3D engine synthesize resources; 4, several position switching 3D animation objects are set in the 3D engine, and coordinates of a switching object are set; 5, an animation object is played, a counter is set, and when the maximal value is achieved, an initial value is returned; and 6, a return key action is acquired, switching of a building roof or specified space is carried out; a left mouse key is acquired, the animation is played or the action is stopped; and a right mouse key is acquired, a computer power-off action is realized. The method of the invention can enable a user to be in a building sales office, the user can feel in an already-built or to-be-built real estate development project to view conditions of the overall building, the sense of reality and the sense of interest are strong, and experience is more profound.

The invention belongs to the field of computer vision and computer graphics, and provides a method which can ensure a newly-generated video sequence to be vivid and reliable and solve the problem of high requirements on an experimental device. According to the technical scheme adopted by the invention, the realistic animation generation method based on Kinect uses a single Kinect v2.0 to carry out static three dimensional model and color depth skeleton information acquisition on a person. A marker-free motion capture method is used, skeleton motion information of each frame and a three dimensional model after deformation are obtained. After a user designates a new action, on the basis of the built data collection, a video for the new action by the person is generated through the proposed sparse representation-based low rank matrix filling texture synthesis method. The method of the invention is mainly applied to video processing.

The invention provides a virtual fitting method and device, and terminal equipment; the virtual fitting method comprises the following steps: obtaining a depth image and a color image of a target user; determining human body posture information of the target user according to the depth image, wherein the human body posture information includes human body contour information and / or human body boneinformation; determining a target garment selected by the target user; selecting a target garment image matched with the human body posture information of the target user from a plurality of garment images of the target garment, wherein the garment images are extracted from model images taken by real person models; synthesizing the target garment image with the color image so as to obtain a virtual fitting image. The target garment image determined by the method is more fitting, better in feeling, and stronger in real senses, thus providing better substitution sense for users, providing betterfitting effects, and effectively improving user experiences.

The invention provides a method and device for rendering a color effect of a virtual object, and belongs to the field of augmented reality technology. The method includes the steps of acquiring a realscene picture and a virtual object matched with the real scene picture; analyzing the real scene picture and determining lighting information corresponding to the real scene picture; determining thecorresponding color of the virtual object in the real scene picture according to the lighting information; and rendering the color effect of the virtual object according to the lighting information and the color. The embodiments of the invention realize the fusion of the color effect of the virtual object and the real scene, and give a user a more realistic feeling.

The invention discloses a virtual reality (VR) communication method and system based on reality scene. The method comprises the steps: A, a VR terminal pre-acquires user headshot information and creates user person model according to the headshot information; B, when a user chats with another user by using the VR terminal, the VR terminal acquires the image of a scene, in which the user is located, and establishes a chatting interface with the image of the scene as the background; and C, during chatting, the VR terminal acquires user action information and / or voice information, and controls real-time change of the person model according to the action information and / or the voice information. Therefore, the VR communication method and system based on reality scene provide a more convenient VR communication mode for the user, improve the reality sense during VR communication, and solve a problem that the virtual reality scene effect of the VR communication system in the prior art is not enough and cannot meet multiple perception experience requirements of the user at the same time.

The invention relates to a forest stand growth modeling method based on a relation model. The method includes the following steps that (1) tree trunks are established, and the trunks are considered as models respectively formed by a single cone frustum or multiple cone frustums; (2) bending of the trunks is controlled, the bending degree of the trunks is controlled by adjusting the relative positions of the cone frustums, the shapes of the tree trunks are fit into a parabola set, and every two adjacent cone frustums are processed in a smooth splicing mode; (3) the angles of elevation of branches are controlled, the branches are set on the trunks, the angles of elevation of the branches are set to obey the normal distribution law, and the initial angles of elevation of the branches are determined through a probability density function and a random function; (4) the azimuth angles of the branches are controlled, and the azimuth angles of the branches are controlled through a chaos function; (5) leaves are drawn, the leaves are set on the branches, and image vectorization and triangularization subdivision or leave photo transparency efficient processing are adopted; (6) a tree growth model is established; (7) a forest stand growth model is established. Compared with the prior art, the forest stand growth modeling method has the advantages that modeling is performed based on a small amount of actually measured data of trees, trees and forest stands can be vividly simulated while efficient and fast modeling is achieved.

The invention provides an interactive virtual reality fire training system, which comprises a host system, a helmet and a simulated water-spraying gun. The host system comprises a first information module used for generating the first 3D visualization information for representing a virtual reality space; and a second information module used for generating the second 3D visualization information of a virtual fire scene corresponding to the virtual reality space. The first display device of the helmet displays the virtual reality space and the virtual fire scene occurred in the virtual reality space according to the first 3D visualization information and the second 3D visualization information. A trainee operates the simulated water-spraying gun according to the 3D visualization information displayed in the first display device of the helmet. The host system generates the new second 3D visualization information according to the operating condition of the simulated water-spraying gun. In this way, the trainee can see a changing virtual fire scene. The virtual reality technology is applied to the fire training system, so that a real accident scene can be truly restored to the maximum degree. Meanwhile, the system has the advantages of vivid training images, strong sense of reality, and better training effect.

The invention discloses a 3D interactive simulated flight path generation method and a 3D interactive simulated flight path generation system, relates to the technical field of air traffic management, and aims to provide a simulated flight path generation method of a variety of flight path data sources in view of the defects of the existing flight path generation process. The method comprises a simulated flight path generation step in which flight path source data is received and a real-time simulated flight path is generated according to the flight path source data, an interactive control step in which a simulation control instruction input by a user is received and the flight path simulation process is controlled according to the simulation control instruction, and a flight path display step in which the result of flight path simulation is displayed.

The invention discloses a subway station fire safety egress guidance monitoring system on the basis of three-dimensional models. The subway station fire safety egress guidance monitoring system comprises an indoor BIM (building information modeling) three-dimensional simulation system, a field monitoring system, a monitoring terminal and a virtual display terminal. The virtual display terminal comprises a display module, a positioning module and an electronic compass module and is used for displaying three-dimensional navigation information and acquiring positioning information. The subway station fire safety egress guidance monitoring system has the advantages that the visualized three-dimensional models of spatial locations of the insides of subway stations are built by the three-dimensional simulation system, current locations of users and fire locations can be added into the visualized three-dimensional models according to the positioning information acquired by the virtual display terminal and monitoring information of the field monitoring system, and the three-dimensional navigation information can be formed according to egress exit guidance information transmitted by the monitoring terminal; a visualized navigation system with high reality sense can be provided for people, accordingly, quick and accurate safety egress guidance and monitoring can be provided for the users, and the subway station fire safety egress guidance monitoring system is favorable for improving the rescue and escape efficiency.

An artificial hand with multiple functions, no error operation and no complication is composed of such artificial units as finger bones, metacarpal bones, ulna, radius, muscle tendons, tendon sheaths, slide mechanism, muscles and skin. It can be connected to the crippled end of human radius by screw and its artificial muscle tendons can be linked with relative ones of human body by stitch.

The invention discloses a method for synthesizing a plant animation. The method comprises the following steps of: 1, extracting a three-dimensional space framework curve of an integrated static virtual model of a plant to be modeled, wherein the framework curve is a geometric center line of the static virtual model; 2, in continuous motion capture time sequences, capturing the motion of the plantto be modeled according to motion capture characteristic points which are arranged on the plant to be modeled, and recording a captured motion data frame; 3, calculating the position offset of the characteristic points in the data frame in a frame-by-frame mode, calculating the offset of marking points which correspond to the characteristic points on the framework curve, and reconstructing the offset framework curve; and 4, according to the offset framework curve, generating the static virtual model of the plant to be modeled after offset to synthesize the animation. By the method, the animation of a plant object is accurately, effectively and realistically synthesized.

The invention discloses a hierarchical multi-view three-dimensional reconstruction texture mapping method, which comprises the following steps: (1) unifying color difference according to the view angle by using a color transfer algorithm based on a front angle as a reference for an image sequence acquired under different views; (2) camera pose correction being performed on the image sequence afterunified chromatic aberration, and a projection transform-related least square method is constructed to solve the problem of camera pose, and the optimal camera pose is solved iteratively to obtain the image sequence after camera pose correction; (3) generating a target image sequence based on the principle of image similarity by taking the image sequence corrected by the camera posture calculatedin the step (2) as a parameter; (4) by constructing Markov random fields to synthesize the texture of triangular patches on the 3D model, the texture mapping being completed. The multi-view three-dimensional reconstruction texture mapping method provided by the invention can effectively improve the error problem of the multi-view three-dimensional reconstruction texture mapping, and has the advantages of good accuracy, strong sense of reality and high texture quality.