460results 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 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 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 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 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 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.

The invention relates to virtual and actual technologies and particularly relates to a 360-degree panoramic multi-point touch display platform establishment method which is used for solving the problem of incapability of combination of a three-dimensional display platform and a touch interactive platform in the prior art. The method comprises the following steps of: generating a file set with a map sign by using panoramic 360-degree pictures; inducing the file set into a computer with an optical touch platform; rendering the file set to ensure that the scene of the file set is matched with the optical touch platform; and switching the scene of the file set by operating the optical touch platform with gestural motions so as to obtain features of objects in the scene. According to the method provided by the invention, panoramic pictures are combined with the optical touch platform so that brand new visual and sensory experiences are brought to users; and users can arbitrarily touch the screen by single-point touching, clicking, doubly-clicking, translating, rotating and the like through the hands so as to obtain relevant features of objects more comprehensively.

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.