142 results about "3 d visualization" patented technology

The invention provides a 3D (three-dimensional) visualization method for a coverage range based on the quick estimation of the attitude of a camera, which comprises the following steps: carrying out 3D scene modeling so as to obtain a 3D scene model, carrying out enhancement on the 3D scene model, and in the process of 3D scene modeling, restoring a depth image from each frame of a video; according to the 3D scene model and the installation position of the camera, registering the camera to the 3D scene model, obtaining camera parameters through estimation according to the attitude of the camera, and determining a projection mapping relation between the video and the 3D scene model; and carrying out displaying in the 3D scene model according to a depth shadow texture principle, interactively picking up a target in the 3D scene model, and according to the projection mapping target, calculating an imaging area of the target in the current camera parameter mode.

The invention relates to the field of computerized generation of a visualization from a plurality of images. In particular, the invention relates to generating a three-dimensional (3D) visualization from a plurality of two-dimensional (2D) medical images. The images may be obtained from an ultrasound device. Regions of interest are segmented in at least two images and the region of interest is then tracked and segmented among the remaining images.

In a method of real-time 3-D visualization and navigation for interventional procedures a position is determined at which data will be acquired, and data is acquired at the position. Features are extracted from the acquired data. A model described by the extracted features is built or updated, wherein updating the model includes calculating at least one acquisition parameter of a set of acquisition parameters. 3-D scenes showing the interior or exterior of one or more organs are displayed using the model or data extracted from the model. A region for updating is determined.

The invention provides a method, a system and a platform for distributed type three-dimensional (3D) multi-channel rendering. The method comprises the steps that a control terminal sends a rendering instruction to rendering channels according to a preset rendering indexed list; the rendering channels render corresponding sub-scene-images according to the received rendering instruction; after rendering is finished by the rendering channels, the control terminal sends a display instruction to the rendering channels; and the rendering channels display the corresponding sub-scene-images when receiving the display instruction. By means of the method, the resource utilization rate of the rendering channels can be improved, the display frame rate of a splicing wall 3D visual application can be effectively improved, computer parallel cooperative work characteristics can be better reflected, fast integration with an existing splicing wall system is achieved, expansibility is high, and the 3D visual application of a splicing wall can be popularized conveniently.

A new method and apparatus for visualization and manipulation of real 3-D objects are disclosed. This new approach utilizes compressed digital video taking advantage of modern video compression technology. The entire system consists of the image acquisition device, the viewing / manipulation program and the 3-D image database. The system first captures images of the object from all possible view angles as a sequence of images (a video). As neighboring images within the sequence will generally be similar, the sequence will be amenable to standard video compression techniques such as MPEG. The acquired video data (rendition of a real 3-D object) is then stored into a database for later access, for instance, over the Internet.Through specially developed software, the stored data can be manipulated while viewing the object. The user simply inputs—via a mouse, for instance—the view angle and the software automatically displays the appropriate frame within the video (stored data). The software allows various object manipulations such as rotation in arbitrary direction, as well as zoom, pan, etc. A particular implementation of the viewing program using a Pentium III processor, randomly accessing an MPEG sequence, through pre-decoding of certain anchor frames, is able to decode fast enough for users to perform real-time manipulation of the object.The captured 3-D image data of an object is stored into a centralized (or distributed) database and users may access the data through the assigned URL for the object over the Internet. The data may or may not be password protected. As such, the overall system is an implementation of a one-stop service for individuals wishing to provide 3-D visualization of real 3-D objects over the Internet.