51 results about "Video mosaicing" patented technology

A multimedia collaboration system that integrates separate real-time and asynchronous networks—the former for real-time audio and video, and the latter for control signals and textual, graphical and other data—in a manner that is interoperable across different computer and network operating system platforms and which closely approximates the experience of face-to-face collaboration, while liberating the participants from the limitations of time and distance. These capabilities are achieved by exploiting a variety of hardware, software and networking technologies in a manner that preserves the quality and integrity of audio / video / data and other multimedia information, even after wide area transmission, and at a significantly reduced networking cost as compared to what would be required by presently known approaches. The system architecture is readily scalable to the largest enterprise network environments. It accommodates differing levels of collaborative capabilities available to individual users and permits high-quality audio and video capabilities to be readily superimposed onto existing personal computers and workstations and their interconnecting LANs and WANs. In a particular preferred embodiment, a plurality of geographically dispersed multimedia LANs are interconnected by a WAN. The demands made on the WAN are significantly reduced by employing multi-hopping techniques, including dynamically avoiding the unnecessary decompression of data at intermediate hops, and exploiting video mosaicing, cut-and-paste and audio mixing technologies so that significantly fewer wide area transmission paths are required while maintaining the high quality of the transmitted audio / video.

A multimedia collaboration system that integrates separate real-time and asynchronous networks—the former for real-time audio and video, and the latter for control signals and textual, graphical and other data—in a manner that is interoperable across different computer and network operating system platforms and which closely approximates the experience of face-to-face collaboration, while liberating the participants from the limitations of time and distance. These capabilities are achieved by exploiting a variety of hardware, software and networking technologies in a manner that preserves the quality and integrity of audio / video / data and other multimedia information, even after wide area transmission, and at a significantly reduced networking cost as compared to what would be required by presently known approaches. The system architecture is readily scalable to the largest enterprise network environments. It accommodates differing levels of collaborative capabilities available to individual users and permits high-quality audio and video capabilities to be readily superimposed onto existing personal computers and workstations and their interconnecting LANs and WANs. In a particular preferred embodiment, a plurality of geographically dispersed multimedia LANs are interconnected by a WAN. The demands made on the WAN are significantly reduced by employing multi-hopping techniques, including dynamically avoiding the unnecessary decompression of data at intermediate hops, and exploiting video mosaicing, cut-and-paste and audio mixing technologies so that significantly fewer wide area transmission paths are required while maintaining the high quality of the transmitted audio / video.

Video mosaicing is commonly used to increase the visual field of view by pasting together many video frames. The invention provides for image mosaicing for general camera motion, including forward camera motion and zoom. After computing the motion between the images in a sequence, strips are selected from individual frames such that the strips are approximately perpendicular to the optical flow. The strips are warped such that the optical flow becomes parallel, and are pasted to a panoramic mosaic. The warping transformation on the strips, which results in making the optical flow to be parallel, can be modeled by an oblique projection of the image onto a cylindrical surface whose central axis is the trajectory of the camera. In addition, this invention uses view interpolation to generate dense intermediate views between original video frames, such that these intermediate views are used to overcome effects of motion parallax when creating panoramic mosaics.

The invention discloses a device and method for carrying out real-time splicing on surveillance videos based on FPGA (field programmable gata array), which relate to a surveillance video splicing device and a surveillance video splicing method, and aim to achieve an effect of carrying out real-time seamless splicing on video signals output by multiple channels of cameras. Under the control of a video capturing circuit, a video decoding circuit converts multiple channels of video signals from a plurality of cameras into digital signals, then the digital signals are corrected by an image preprocessing module, and after the digital signals enter into an image splicing module to implement the seamless splicing of each frame of images, a video display control module controls a video digital-to-analog conversion circuit to output the video subjected to splicing to a display in real time. According to the invention, the video signals output by the multiple channels of cameras can be subjected to real-time seamless splicing, and the video signals with partial overlapped scenes, output by the multiple channels of cameras, can be subjected to space matching alignment, then the video signals are subjected to seamless splicing so as to form a channel of wide-scene video, and low-distortion video signals subjected to splicing are directly output on the display. The device and method disclosed by the invention are applicable to the real-time splicing of the surveillance videos.

The invention provides a video splicing apparatus and a video splicing method based on image splicing. The video splicing method based on image splicing comprises the following steps: obtaining a first path of videos and a second path of videos to be spliced; respectively extracting a feature point corresponding to each frame of image in n frames of images in the first path of videos and the second path of videos; sequentially splicing the ith frame of image of the first path of videos and the ith frame of image of the second path of videos according to the feature point of the ith frame of image of the first path of videos and the feature point of the ith frame of image of the second path of videos to obtain a spliced video; and displaying the spliced vide. According to the video splicingmethod based on image splicing provided by the invention, the features of the two paths of videos are extracted and executed to improve the splicing efficiency and the splicing stability.

The invention provides a video splicing method based on the Bayesian theory. The method comprises steps of estimating a flow field for a corresponding frame of a video, and considering image registration errors caused by inaccuracy of the flow field; applying the Bayesian theory in time and space and using the image errors as self-adaption reliability so as to obtain a posterior probability model after splicing of the video; and solving a maximum posterior model by means of the optimization method so as to obtain stable high-quality video output results. According to the invention, singular points caused by inaccuracy of estimation of the flow field can be effectively removed in space and stability of the video is ensured in time, so high-quality video output results can be obtained.

Methods and systems for mosaic mode display of video are disclosed. Aspects of one method may include generating video data for a plurality of video windows using a single video feeder module comprising a single video scaler and a single video capture module. The video data for the video windows may be generated in a single frame time. Register DMA may be used to transfer register update data (RUD) to a plurality of registers to configure video processing for generating video data for a video window. The plurality of RUDs may be generated in response to a single interrupt to a processor, and may be configured as a linked list or stored sequentially in memory. The configuring may occur prior to generating video data for the corresponding video window. Video processing for a subsequent video window may be configured automatically after generating video data for the present video window.