42 results about "VRML" patented technology

A method for producing a virtual forecasted model of a breast augmentation subject, comprising, receiving a preoperative subject's scanned image, wherein the scanned image comprises a three dimensional image, converting the scanned image from a scanned image format to a VRML image format, importing the converted VRML image into a VRML image editor, receiving, from a breast implant database, at least one modeled virtual breast implant, wherein the received virtual breast implant is selected based on a desired actual breast implant that is to be implanted in the preoperative subject, and embedding the received virtual breast implant in the preoperative subject's converted VRML image.

The invention relates to a three-dimensional simulation of reality navigation system, including a show part that at least has: a first window, with a first control division, controls the first window to show the vertical overlooking the two-dimensional image of the location of an object; a second window, with a second control division, controls the second window to display a virtual reality modeling language (VRML) format 3-D images, the 3-D image is used to display and record the dynamic information of the subject; the two-dimensional, three-dimensional images with each other constitute a navigation system. The invention has the son mother switch window, switches / at the same time displays the two-dimensional images and three-dimensional images, and to the point of overlooking the images showed more changes, but also indicates the car with his vehicle dynamics.

Disclosed is an invention, which cooperates with CAD for production design. It is characterized in that: employing the separate transmission mechanism of model synchronization and operation synchronization between client and server to realize real time synergetic design; also employing stream sockets for information exchange. For three-dimensional model, server terminal and each client terminals are provided with: model display module based on VRML files, customer interchange and communication modules; for two-dimensional model, the server terminal and client terminals are provided with communication module, remark module based on VECT library and communication module. The invention has the advantage of improving the real time communication efficiency between designers, of shorting production-developing cycle.

The present invention provides a method of combining various types of data and software in order to arrive at a composite graphical representation of a construction site, including surface and subsurface features. A 2-D or 3-D graph of subsurface contoured surfaces is created. A 3-D wire-frame model of surface and subsurface features is created. Aerial photographs of the site can be incorporated and the aerial photographs contoured surfaces and wire-frame model are to produce a complete Visual Reduction Modeling Language (VRML) model of both surface and subsurface features. The VRML model allows the user to identify and visualize a relationship between sub-surface features and above ground features.

A Web-based 3D-image display system that downloads 3D-image files from a Web server and smoothly displays 3D -images on a Web browser. The Web-based 3D-image display system is provided with a Web server storing compressed 3D files that have been edited and created based on 3D-scene information extracted from a VRML file or the like, and a 3DA applet for displaying 3D scenes; and a Web browser for displaying the 3D scene. The Web browser requests and downloads the 3D applet from the Web server and requests and downloads the compressed 3D file from the Web server by executing the 3D applet. After downloading and receiving all information, the Web browser continuously displays an interactive 3D -scene by executing, independently of the Web server, real-time 3D-rendering and 3D-motion algorithms using the 3D applet.

The invention relates to a manual assembling method of a virtual three-dimensional model based on VRML-JAVA, comprising the following steps: (1) establishing a part 3D model and a rendering model thereof; (2) defining a VRML assembling model; (3) determining an assembling group, parts contained in the assembling group, and the number of the parts; (4) determining a part assembling sequence; (5) selecting the parts with a correct assembling sequence; (6) dynamically transferring part nodes; (7) determining a manual movement interference range of the parts; (8) manually moving the parts along a three-dimensional direction in a VRML scene; (9) monitoring the current position state of the parts; (10) determining if assembling positions of the parts are correct; and (11) completing all part assembly. The invention can overcome the dependence on object sample pieces and effectively enhance the assembly design benefit of the parts, has functions of assembling the parts with off-site cooperated with manual operation, detecting collision interference, prompting correct assembly information and enhancing the appearance reality sense of the parts and can randomly manually move the parts to assemble or disassemble by observing from any position along a triaxial direction.

The invention discloses a virtual simulation hospital nursing teaching and training system, and a method of constructing the virtual simulation hospital nursing teaching and training system by using a computer multimedia technology and a 3D graphics algorithm of VRT and a virtual reality technology of WEB VRML. The virtual simulation hospital nursing teaching and training system comprises a hospital admission nursing module, a hospitalization nursing module, a patient treatment module, and a hospital discharge nursing module. Each module is composed of an interaction layer, a function layer, a driver layer, an integration layer, and a resource layer. The virtual simulation hospital nursing teaching and training system is constructed using the current advanced virtual reality technology, and thus, a wider and convenient simulation teaching and research platform is provided for all levels of hospitals and medical colleges and universities. The virtual simulation hospital nursing teaching and training system is mainly used for teaching and training students in medical colleges and universities and newly-employed medical staff in hospitals in order to reduce teaching cost, reduce medical risk, save training resources and improve the quality of teaching and training.

The invention relates to a 3D roaming system of virtual fractional scenes, including a material quality generating unit, an entity constructing unit, a VRML browser, a scene map editing unit and a virtual scene browsing unit, and its working flows: starting; initializing device; initializing scene; interactive processing: receiving the information including forward, backward, look-up, look-down, turning left and turning right, and making corresponding transformation on a 3D model and the observed state; calculating object information; pattern romancing processing; ending and otherwise returning to interactive processing recovering resources. It has the advantages of simple structure, low cost, convenient operation, fast generating of scene environment, etc, and perfects the virtual-reality entity base, applied to the requirements of virtual battlefield training and virtual driving training.

The invention relates to a relay protection simulation training platform construction method based on the VR technology. A simulation training platform comprises a host, an interaction device and an experience device. The interaction device and the experience device are connected with the host and arranged on the body of an operator. The construction method comprises steps of using the VRML technology to carry out modeling and forming a model database, wherein the model database is stored in the host. In the model database, through the VRML technology, according to the physical structure of atransformer substation and actual work of a maintenance worker, a virtual transformer substation electrical device model is obtained through carrying out of geometrical modeling, physical modeling andbehavior modeling. Through the Java and/or JavaScript language, scripts are compiled so that function extension is performed on the VRML. Through the Java, communication and interaction control between the operator, the experience device and the interaction device and the transformer substation simulation training system are achieved. An expert database is stored in the host. A typical defect analysis library and a typical operation simulation library for secondary maintenance of the transformer substation are provided.

The invention discloses an application method of virtual mannequin. The virtual mannequin consists of at least 100 sections and 40-70 data points which represent all the sections respectively. The file format of the mannequin is physical data defined by CAD software and file of VRML format. The application method comprises that: the native places and birthplaces of father and mother of the applied object and the birthplace of the applied object are confirmed; and the district bodily form of the applied virtual mannequin is confirmed; the age period of the applied object is confirmed; comparing with the physical data of mannequin defined by CAD software and file of VRML format, the data of the bodily form of the applied object is input, and the applied virtual mannequin is confirmed again. Therefore, research precision can be improved greatly in a short time, and according to different districts and age periods, bases are provided for suitability of clothes production, making of specification standard of clothes, research and analysis of clothes function and accurate data measurement of human body.

The invention relates to an IDL based method for three-dimensionally visualizing medical images. The method comprises the following steps of: converting DICOM data into three-dimensional visualized medical images through volume rendering algorithm, converting the medical images into a virtual reality data model through VRML interactive description, and controlling the displayed graphics state through a human-computer interface on a GUI (Graphical User Interface) and a control interface so as to form visualized virtual images, wherein the volume rendering algorithm comprises the following steps of: defining an object in an object graphics system; calling the object through an object-creating OBJ_NEW function; respectively calling a pattern object, a viewing object, viewing group objects and a scene object by utilizing ADD calling format; drawing the scene object in a window object by utilizing a window object DRAW method; and completely deleting the objects by utilizing the OBJ_DESTROY function after display is accomplished. The method has the advantages of meeting the basic requirements of visualization of the medical images, and being capable of carrying out corresponding operations, such as volume rendering, slicing, and the like.

The invention relates to a teaching aid for physical experiment teaching, in particular to a WEB-based interactive physical experiment teaching device and a control method thereof. The device consists of a client end module subsystem and a server end subsystem, wherein the client end module subsystem consists of a three-dimensional instrument display module, an interactive operation data processing module, a client end effect processing module, a local temporary operation data memory, and an interactive operation result data transmission module; and the server end subsystem consists of a service data processing module, a server end data memory module and a numerically controllable physical experiment instrument. During control, a VRML client end sends a request for virtual three-dimensional data to the server, the server returns the data after verification, and the VRML processing program at the client end displays the results at a client end interface and judges whether the client end finishes the operation. The method solves the defect that CAI experiment teaching lacks simulated interaction, thereby realizing interactive three-dimensional physical experiment and simulation, and improving teaching effects.

The invention provides a three-dimensional model boundary line extraction method based on a VRML technique. The boundary line extraction method includes the following steps of (1) reading a VRML file, recognizing text data through a regular expression and then storing the data in an array in a certain form, (2) setting a normal vector mutation threshold value T which is called a threshold value T for short by a user, wherein the value depends on the largest curvature value on a three-dimensional model, and the larger the curvature value is, the larger the threshold value is, (3) subtracting normal vectors in a unit normal vector array two by two to obtain a vector module, comparing the vector module with the threshold value T, and deleting diagonal lines and repeated boundary lines according to a comparison result, (4) arranging a remaining line segment to obtain a boundary line array, writing the boundary line array and a coordinate array into a data form document, and storing the data form document in a disk of a computer. The method is wide in application range and can be used for processing any three-dimensional model with complicated appearance.

A method to compile images and data created on different software platforms into a platform-independent image begins when a PCB assembler utilizes a VRML interface to make a request to show an image of a PCB or any part of a PCB. The request is sent to a WWW server, which in turn, contacts a database interface, such as CGI. The requested image data is stored on at least one external database and is likely comprised of many individual elements created on many different software platforms, such as Gerber or CAD. The database interface retrieves the requested image data from the external databases and funnels it to the PCB assembler via the WWW server. Finally, the VRML interface software compiles all of the multi-platform data and generates a new, software- and processor-independent image.

A method for automated authoring and hyperlinking of VRML (Virtual Reality Modeling Language) documents comprises inputting of a VRML file structured in Standard Generalized Markup Language (SGML); extracting a hierarchy of Anchorable Information Units (AIU's) from the VRML file; associating respective anchor nodes with each of the AIU'S to be hyperlinked; entering the respective anchor nodes into an AIU file utilizing VRML AIU specification language; and associating the AIU file with the VRML file.

The invention discloses a trajectory optimization method for the procession of a mould pneumatic grinding wheel based on a three-dimensional boundary extraction. The trajectory optimization method comprises the following steps: (1) modeling, and storing a CLSF (Cutter Location Source File) file of a trajectory planning and a VRML (Virtual Reality Markup Language) file of a model; (2) reading the VRML file, adopting a regular expression to identify text data, and then storing the data into an array; (3) setting 'normal vector mutation threshold value' by a user, wherein the value is obtained according to a maximum curvature on 3D model (three-dimensional model), the curvature is larger, the threshold value is larger; (4) taking vector modules after normal vectors in a unit normal vector group are conducted for the pairwise difference, comparing the vector module with a threshold and deleting diagonal lines and repeated boundary lines according to the comparison results; (5) setting the rest of line segments to obtain a boundary line array; and (6) calculating the distance between the center of a contact surface of any processing point and every boundary on a trajectory plan, and carrying out posture optimization on relative positions of the boundary lines and the processing points. According to the method, the problem of boundary in a pneumatic grinding wheel procession process path can be considered, and the effect is significant.