91results about How to "Guaranteed realism" patented technology

The embodiment of the invention discloses an implementation method, an implementation device and an implementation system for virtual reality entertainment driving. The implementation method comprises the steps of acquiring location information of all driving carriers in a driving site, and acquiring observation posture information of a user on the first driving carrier; according to the position information and observation posture information, judging that whether the second driving carrier appears in the vision field range of the user on the first driving carrier; and according to a judgment result, generating a corresponding virtual reality driving scene by using the second virtual user and/or the virtual environment of the current location of the first driving carrier and displaying the scene. During the above process, by collecting the actual positions of the driving carriers in real time, a corresponding multi-user interactive virtual reality driving scene is generated according to the relative positions of the actual positions and the driving carriers, and thus the multi-user interaction efficiency is effectively improved; furthermore, the users control the real driving carriers, and achieve the driving experiences of different virtual environments by switching scene modes, and the characteristics of high reality, strong entertainment and low cost are provided.

The invention relates to a fuse life characteristic data test and evaluation system, which comprises a test module, a data collecting module, a life evaluating module and a display module, wherein the life evaluating module calculates an integral accelerating factor and a corresponding mean running time in an accelerated stress condition when the fuses reach each selected cold-state resistance value and when a fusion or a test ends, and the integral accelerating factor and the corresponding mean operating time are converted into the life of the fuse in a normal operating current condition. In the fuse evaluation system, by setting a cold-state resistance value for each phase of the fuse, the time and the corresponding melt temperature when each fuse reaches corresponding cold-state resistance value and when the fusion or the test ends can be observed, recorded and calculated statistically to obtain a mean running time; and simultaneously, the accelerating factor of each phase is calculated so that the verisimilitude of the life evaluation result of the fuse can be guaranteed, the problem of over-age service of the fuse is avoided, and the reliable and safe running of electrical equipment and electrical lines is guaranteed.

The invention suggested combination anti-accident maneuver method of provincial and prefectural two-stage power system, pertains to the power system dispatching automation and simulation technology. First of all provincial power network dispatching centers and prefectural network dispatching centers automatically generate initial power flow parameters according to their own power network real-time data, the provincial dispatching centers send the data to the prefectural dispatching centers; the prefectural dispatching centers correct the prefectural power network flow distribution after receiving the parameters, after the power network disturbance occurred, the provincial dispatching centers and the prefectural dispatching centers respectively send their flow parameters data after being changed to the other party, and correct the respective states. The method has the advantages that: the provincial and the prefectural dispatching centers can reflect mutually the impact of their own power network model changes on the other side, and ensure the fidelity of the combination anti-accident maneuver; only a small number of key information is exchanged between the provincial and the prefectural dispatching centers; and the provincial and the prefectural dispatching centers can independently conduct the combination anti-accident maneuver, which is a kind of decoupling mode and has a in high availability of their own system.

The invention discloses an all-weather active type panoramic sensing device which comprises a mobile object laser light source, a multi-element output all-around visual sensor and a micro processor, wherein a mirror surface with double curved surfaces and two camera units are arranged in the multi-element output all-around visual sensor; a polarization splitting prism is arranged on a refraction and reflection light path of the mirror surface with double curved surfaces is used for splitting the refraction and reflection light of the mirror surface with double curved surfaces into light containing a certain polarized component and light not containing a certain polarized component; the two camera units are respectively positioned on reflection and refraction light paths of the polarization splitting prism, and are used for respectively acquiring a first panoramic video image containing polarized light information and a second panoramic video image containing light intensity information; the micro processor is used for fusing point cloud geometrical information in the first panoramic video image with the color information in the second panoramic video image, and constructing a panoramic 3D model. The invention further discloses a 3D panoramic modeling approach adopting the all-weather active type panoramic sensing device.

The invention provides a collision detection method for objects in a large-scale scene. The method includes the first step of establishing an AABB bounding box, the second step of conducting dimension reduction processing, the third step of obtaining a dynamic list and the fourth step of carrying out collision detection calculation. The Sweep and Prune algorithm is comprehensively used, objects which do not collide in the future are removed by scanning states of moving objects in the three-dimensional scene, and therefore the calculation quantity of collision detection is greatly reduced, and real-time rendering efficiency of a physical engine is improved. The latest research achievements of current computer vision and physical engine technical fields are introduced into a power transmission line inspection simulating training system, and a virtual power transmission line inspection training environment which has high simulation, is interactive and is deeply immersed is showed to trainees on the basis of an efficient large-scale scene collision detection algorithm. The collision detection method lays key theory and application foundations for the collision detection technology and physical engine technology in electric system simulation training and has very good application prospects.

The invention discloses a third-dimensional fluid simulation method referring to heat conduction and dynamic viscosity. The method comprises the steps that 1, discrete modeling is carried out on the heat conduction process in fluid and the heat conduction process between the fluid and the outside based on a smoothed particle hydrodynamics (SPH) model, and the phase change process is simulated according to the influence of enthalpy of phase change on the phase change temperature; 2, calculation of the dynamic viscosity is introduced to show details in the fluid motion process; 3, a PCISPH algorithm is called to complete the remaining fluid motion simulating process; 4, a GPU accelerating algorithm is utilized for processing the processes of heat conduction, phase change, fluid viscosity changes and the like in parallel on a compute unified device architecture (CUDA), and fast simulation of third-dimensional phase change fluid is achieved. By means of the method, the heat conduction process between different kinds of fluid and the outside and the viscosity change process of the fluid can be simulated really and efficiently, simulation details in an existing method are enhanced, and the sense of reality of fluid simulation is improved.

The invention discloses an interactive three-dimensional human face expression animation editing method and system and an extension method. The three-dimensional human face expression animation editing method comprises the following steps: mapping a two-dimensional control point pixel of a human face model freely appointed by a user and moved to an expected position to a three-dimensional space, so as to obtain a three-dimensional control point corresponding to the human face model; establishing a deformation model of deformation of the three-dimensional control point, caused by editing operation of the user; calculating a correlation coefficient between each vertex and the three-dimensional control point on the human face model respectively; dividing the human face model into different dynamic regions according to the correlation coefficient, wherein each dynamic region comprises one three-dimensional control point; constructing a contribution chart of the three-dimensional control points; carrying out deformation fusion on the dynamic regions according to the contribution chart and the deformation model; finally, obtaining the overall deformation of the human face model. The three-dimensional human face expression animation editing method has the advantages that the calculation is simple, and the deformation of each dynamic region can meet the requirements of users and is also accurate and natural.

The invention discloses a preparation method of tobacco-derived basic smoke flavor raw material. The technical scheme of the invention is to carry out dry distillation and pyrolysis of tobacco raw materials in a closed system at 180-365° C.; and then extract aroma substances from the tobacco raw materials after dry distillation and pyrolysis. The extracted product and its further refined product are the tobacco-derived basic smoke flavor raw materials. This raw material is applied to new tobacco products, which not only has the natural aroma of tobacco, but also can significantly increase the aroma characteristics of new tobacco products, such as smoky aroma, burnt aroma, and roasted aroma, making it closer to traditional cigarettes. The raw material can also be applied to traditional cigarettes. The invention has the advantages of simple process, economical safety, obvious application effect and broad application prospect.

The embodiment of the invention provides a three-dimensional geographic scene model construction method and device based on a stereoscopic remote sensing image. The method comprises the following steps: carrying out image preprocessing on an original satellite remote sensing image, and acquiring a digital elevation model image and a digital orthoimage; conducting slicing according to a preset image slicing rule to obtain a digital elevation model image tile and a digital orthoimage tile; establishing a three-dimensional terrain model by using a triangulated irregular network construction technology, and mapping landform texture to the three-dimensional terrain model based on a texture coordinate mapping technology to obtain a partitioned three-dimensional geographic scene model; and finally, storing the partitioned three-dimensional geographic scene model according to tile row and column numbers to obtain a three-dimensional geographic scene model corresponding to the original three-dimensional satellite remote sensing image. Compared with a traditional modeling method, the technical scheme of the invention has the advantages of large modeling scale, high efficiency and high automation degree, and greatly improves the model construction efficiency and the like while ensuring modeling precision and the sense of reality.

The invention discloses a vehicle driving training device, as well as an operation method and an operation device of the vehicle driving training device. One specific implementation mode of the vehicle driving training device is as follows: the vehicle driving training device comprises a vehicle in-built part, a sensor, a controller and a presenting device, wherein the sensor is used for collecting the motion state information of the vehicle in-built part; the controller is used for determining a to-be-executed driving scheme under the current driving simulation scene according to the unmanned driving strategy, and updating the operating state of a driving simulation vehicle in the driving simulation scene after identifying that the vehicle in-built part is subjected to preset operation according to the motion state information collected by the sensor; the presenting device is used for presenting the driving simulation scene and the driving scheme in a virtual reality scene, so that a user can operate the vehicle in-built part according to the presented driving simulation scene and the driving scheme during driving training. With the adoption of the implementation mode, a user can safely and efficiently exercise the vehicle driving skills.

The invention discloses a multipoint contact force sense feedback system orienting virtual reality dental department operation training. In the multipoint contact force sense feedback system, a force feedback equipment state reading module (1) reads a handle motion trail of force feedback equipment (44), converts the handle motion trail into a force sense tool terminal pose and outputs the force sense tool terminal pose to a tool model (41) and a force/torque computation module (4); a spherical tree collision detection module (2) carries out collision rejection processing on a dynamic force sense tool sphere tree output by the tool model (41) and a static dentition sphere tree output by a multilayer tooth model (42) by adopting a layering recursion collision detection strategy, so as to obtain all the intersected sphere pairs of leaf nodes; a multipoint contact collision response module (3) processes all the intersected spheres of the leaf nodes by adopting a collision response optimization model, so as to obtain a terminal pose of a graphic tool; and the force/torque computation module (4) processes the terminal pose of the graphic tool according to a generalized spring force model, so as to obtain a feedback force/torque, and the feedback force/torque is acted onto the force feedback equipment (44). The multipoint contact force sense feedback system disclosed by the invention can accurately solve a contact position and a posture of the graphic tool and a virtual dentition surface during continuous collision detection.

The invention relates to the field of the multimedia technology, and discloses a multi-frame fusion display method based on the 3D technology, and storage equipment. The multi-frame fusion display method comprises steps: presetting 3D display scenes, wherein the 3D display scenes include more than two display windows; obtaining more than two to-be-displayed data sources from an application of the same terminal, respectively rendering different data sources to different virtual screens, and displaying virtual screen display results obtained after rendering on different display windows in the 3D display scenes; or displaying the different data sources on the different display windows in the 3D display scenes through different coordinate systems. According to the multi-frame fusion display method based on the 3D technology, different display effects of the display windows can be realized through setting of different 3D display scenes, the display modes and effects of the data sources are no longer single, the to-be-displayed data sources are fused into the 3D scenes, the display of the data sources is more vivid, stronger immersion is achieved, the browse is more convenient, and the display is more diversified and vivid.

The invention discloses a method of three-dimensional geographic information system (GIS) terrain rendering. According to the method of the three-dimensional GIS terrain rendering, quad-tree partitioning is carried out on terrain data loaded from the three-dimensional GIS to generate rectangular grids of the terrain data, viewing pyramid cutting is carried out on the rectangular grids to obtain rectangular grids needed to be displayed, the rendering accuracy of each rectangular grid needed to be displayed is calculated and then is judged whether the rendering accuracy of each rectangular grid reaches a preset standard, then the quad-tree partitioning is carried out again on each rectangular grid which does not reach the preset standard, and for each rectangular grid reaching the preset standard, terrain units are generated and rendered according to the terrain data corresponding to each rectangular grid. The invention further discloses a system of the three-dimensional GIS terrain rendering correspondingly. The method and the system of the three-dimensional GIS terrain rendering can effectively improve the speed of the three-dimensional GIS terrain scene rendering, and enables the data processing process to be simpler and more rapid.

The invention discloses a portable all-weather active panoramic vision sensor. The portable all-weather active panoramic vision sensor comprises an all-directional vision sensor capable of fusing polarization imaging through which light intensity and polarized light information are output with a panoramic picture, a panoramic laser light source and a microprocessor for performing 3D panoramic reconstruction on an all-directional image; the center of the multi-source output all-directional vision sensor and the center of the panoramic laser light source are arranged on the same axis; the microprocessor comprises a calibration part and a 3D reconstruction part; the calibration part mainly comprises a multi-source output all-directional vision sensor calibration module and a joint calibration module; the 3D reconstruction part mainly comprises a panoramic laser light source emission angle position estimation module, a panorama plane laser information analysis module, a panorama plane point cloud geometry information computation module, a point cloud geometry information and color information fusion module, and a construction module for constructing a panoramic 3D model according to panoramic plane position information. According to the portable all-weather active panoramic vision sensor, functions of portable all-weather active panoramic perception and automated 3D panoramic modeling are realized.

The method is a construction method of hierarchical detail models of conifer plant canopy. When the projection width of conifer in an image space is bigger than a pixel value, column models are used for describing conifer, and the column models are automatically processed by polygonization according to the distance so as to be expressed as prisms with different numbers of seamed edges. If the distance is continuously increased and the projection width of conifer in an image space is smaller than a pixel value, the column models are degenerated to be linear models so as to greatly reduce the geometric complexity of models. In addition, combination operation can be carried out between lines, and a small number of lines can used to express a whole tree crown so as to realize further compression of geometric models of conifer. In order to correctly describe the information of sub-pixel space and enhance the vivid effect of drawing, the linear models used in the method are semitransparent, and the transparency of each line depends on the distance between a plant corpus and a view point as well as the corresponding simplification error.

The invention discloses an active omni-directional vision-based 3D (three-dimensional) environment duplication system. The system comprises an omni-directional vision sensor, a mobile body laser source and a microprocessor which is used for carrying out 3D omni-directional reconstruction and 3D omni-directional drawing output on an omni-directional image, wherein the microprocessor comprises a calibration part, a 3D reconstruction part and a 3D omni-directional display drawing part; the 3D omni-directional display drawing part mainly comprises an omni-directional drawing module by taking an object as a center, a perspective display drawing module by taking a human body as a center, an omni-directional perspective circulating display drawing module, a stereo perspective display drawing module, an omni-directional space diagram circulating display drawing module and a stereo perspective display drawing module for observing distance changes. The invention further discloses an active omni-directional vision-based 3D omni-directional display drawing method. According to the method, perfect combination of geometric accuracy and reality sense of 3D omni-directional model reconstruction, omni-directional 3D scene drawing display with immersive vision and reconstructing process automation can be realized.

The invention discloses a visual intelligent exhibition hall intelligent exhibition management system based on a VR technology. The visual intelligent exhibition hall intelligent display management system based on the VR technology comprises an exhibition hall basic information acquisition module, an exhibition information acquisition module, an exhibition model construction module, an exhibition entrance setting module, a user experience item setting module, a user experience information acquisition module, a cloud analysis platform and a data sending terminal. By analyzing the experience information corresponding to each participating user of the VR virtual exhibition hall, the problem that the exhibition effect of the exhibition hall cannot be effectively improved due to the fact that the content managed by an existing online exhibition hall exhibition management system is single is effectively solved, the exhibition experience of the user is greatly improved, and the experience of the user is improved. The real-time updating of the layout of the display area of the VR virtual exhibition hall is realized, and meanwhile, the management content of the VR virtual exhibition hall is expanded.

The invention discloses a multifunctional tone change drum set which comprises a drum barrel, drum skin, a drum ring, a drum clamp, a catch and a tone amplification device. The tone amplification device comprises a controller, a loudspeaker and a power source. The drum skin is arranged on the drum barrel, the drum skin is sleeved with the drum ring, the drum skin is fixed to the drum barrel, the drum clamp is arranged in the middle of the drum barrel, the catch and the tone application device are arranged inside the drum barrel, the controller is connected with the loudspeaker, and both the controller and the loudspeaker are connected with the power source. According to the multifunctional tone change drum set, the height of the catch gradually increases from inside to outside, due to separation through the catch, air flow inside the drum set is different, generated tones are different, and accordingly the tone change effect of the drum set is achieved; as the tone amplification device is additionally arranged, the sound of the drum set is amplified, and play vividness can be guaranteed; in this way, damage to the drum skin can be alleviated, and the effect of reducing physical output of a drummer is also achieved.

The invention discloses an image repetition quality improving method of a large-color-gamut display device in order to solve the technical problem that repeated image quality is poor in image repetition of an existing large-color-gamut display device. The method includes the following steps that a digital drive value of each pixel is extracted; the digital drive value of each pixel is converted into a CIE tri-stimulus value corresponding to the digital drive value; a color appearance space amount of each CIE tri-stimulus value is calculated through a CIECAM02 model; color appearance space amounts subjected to pixel modulation are obtained; gain coefficients and gamma coefficients of a red channel, a green channel and a blue channel are calculated respectively; a reverse characteristic model is built; the color appearance space amounts are converted into modulated CIE tri-stimulus values; the modulated CIE tri-stimulus values are converted into modulated digital drive values by means of the reverse characteristic model. By means of the method, repeated image quality can be effectively improved, reality sense of memory color and the colorful vision effect of non-memory color are guaranteed, and the method can be used for image display of smart mobile phones, tablet computers and other intelligent mobile terminals.

The invention discloses a flexible deformation simulation modeling method for supporting real-time pressing. The method includes the steps of initializing a virtual scene; detecting a position, wherein when a virtual agent crashes to any point on the surface of a virtual flexible body, giving the virtual touch pressure function; filling the inner part of an interactive partial zone of the virtual agent and the virtual flexible body by means of a combination spiral virtual model formed by laminating disk springs with different thicknesses; calculating the deformation in the partial zone of the virtual flexible body by the virtual model of the combination spring; refreshing images, continuously feeding back the touch information of an output force, and applying the information to the real-time deformation simulation process of the virtual man-machine interacted virtual flexible body. The modeling approach is simple in calculation, the deformation can be exactly and rapidly calculated, and the real-time deformation simulation of the flexible body can be realized; the force touch information returned to an operator is true, the soft tissue is vivid in deformation, and the man-machine interactive process is nature.

The invention discloses a three-dimensional modeling method for human hands. The three-dimensional modeling method comprises the steps that the hand model is searched from a training set to act as thetemplate and nodes are drawn for the template; the template is matched with other samples in the sample set and the parameter of the rotating angle of each node of the template corresponding to the samples is determined; a matrix attitude change compensation matrix related to the attitude information is trained through the attitude information trained in the step 2; attitude unification is performed on the model in the sample library and the main component is extracted, and the matrix used for depicting different shapes is determined; and the template and the matrix are determined through thetraining and then various hand models can be depicted by manually assigning the parameter through the linear hybrid skin algorithm and parameter integration. The method of performing realistic modeling of multi-attitude gestures through the single three-dimensional hand template is realized, and different characteristics of different figure hand shapes can be reflected without using three-dimensional laser scanning so that the cost can be greatly reduced.

The invention discloses a gas scene end-to-end rapid reconstruction method under a limited view, which is characterized in that the gas scene end-to-end rapid reconstruction method specifically comprises the following steps: 1) generating a preliminary estimated density field; 2) reconstructing a velocity field; 3) optimizing a density field; and 4) according to the reconstructed physical field ofthe gas scene, generating a more attractive result and a richer visual detail effect. Compared with the prior art, the method has the advantages that the gas scene is quickly and effectively reconstructed by inputting the front view and side view sequences, and detail enhancement method or artistry control is performed, so that the reconstruction performance of the smoke scene is greatly improved, and the effectiveness and robustness of the reconstruction result are ensured.

The invention is concerned with the post-processing technology of the digital camera shooting image, especially the post-processing method of the image exposal compensation based on the Retinex. The first half-part is the traditional Multiscale-Retinex processing method, make the weighted average of the processing result and the original image after getting the Retinex processing result, the result of the weighted average as the final result and make the weighted average with the original image, the result of the weighted average is as the final result output: Iout=wIoriginal+(1-w)Iretinex;The W is 0.4-0.6. The invention can achieve that need not the complicated parameter adjustment and satisfy the right processing of different image, ensure the natural vision of the output that is more close to the actual scenery by the human eye.