185 results about "View synthesis" patented technology

A method processes a multiview videos of a scene, in which each video is acquired by a corresponding camera arranged at a particular pose, and in which a view of each camera overlaps with the view of at least one other camera. Side information for synthesizing a particular view of the multiview video is obtained in either an encoder or decoder. A synthesized multiview video is synthesized from the of multiview videos and the side information. A reference picture list is maintained for each current frame of each of the multiview videos, the reference picture indexes temporal reference pictures and spatial reference pictures of the acquired multiview videos and the synthesized reference pictures of the synthesized multiview video. Each current frame of the multiview videos is predicted according to reference pictures indexed by the associated reference picture list.

A method processes a multiview videos of a scene, in which each video is acquired by a corresponding camera arranged at a particular pose, and in which a view of each camera overlaps with the view of at least one other camera. Side information for synthesizing a particular view of the multiview video is obtained in either an encoder or decoder. A synthesized multiview video is synthesized from the multiview videos and the side information. A reference picture list is maintained for each current frame of each of the multiview videos, the reference picture indexes temporal reference pictures and spatial reference pictures of the acquired multiview videos and the synthesized reference pictures of the synthesized multiview video. Each current frame of the multiview videos is predicted according to reference pictures indexed by the associated reference picture list with a skip mode and a direct mode, whereby the side information is inferred from the synthesized reference picture.

Multiview videos are acquired by overlapping cameras. Side information is used to synthesize multiview videos. A reference picture list is maintained for current frames of the multiview videos, the reference picture indexes temporal reference pictures and spatial reference pictures of the acquired multiview videos and the synthesized reference pictures of the synthesized multiview video. Each current frame of the multiview videos is predicted according to reference pictures indexed by the associated reference picture list with a skip mode and a direct mode, whereby the side information is inferred from the synthesized reference picture. Alternatively, the depth images corresponding to the multiview videos of the input data, and this data are encoded as part of the bitstream depending on a SKIP type.

A method for real-time video communication. Specifically, one embodiment of the present invention discloses a method of video conferencing that captures a plurality of real-time video streams of a local participant from a plurality of sample viewpoints. From the plurality of video streams, a new view synthesis technique can be applied to generate a video image stream in real-time of the local participant rendered from a second location of a second participant with respect to a first location of the local participant in a coordinate space of a virtual environment. A change in either of the locations leads to the modifying of the video image stream, thereby enabling real-time video communication from the local participant to the second participant.

A method for displaying a captured image on a display device. A real image is captured by a vision-based imaging device. A virtual image is generated from the captured real image based on a mapping by a processor. The mapping utilizes a virtual camera model with a non-planar imaging surface. Projecting the virtual image formed on the non-planar image surface of the virtual camera model to the display device.

An image-based rendering system and method for rendering a novel image from several reference images. The system includes a pre-processing module for pre-processing at least two of the reference images and providing pre-processed data; a view synthesis module connected to the pre-processing module for synthesizing an intermediate image from the at least two of the reference images and the pre-processed data; and, an artifact rejection module connected to the view synthesis module for correcting the intermediate image to produce the novel image.

The invention is embodied in a process for synthesizing a new image representing a new viewpoint of a scene from at least two existing images of the scene taken from different respective viewspoints. The process begins by choosing a planar surface visible in the at least two of the existing images and transforming the at least two existing images relative to one another so as to bring the planar surface into perspective alignment in the at least two existing images, and then choosing a reference frame and computing parallax vectors between the two images of the projection of common scene points on the reference frame.Preferably, the reference frame comprises an image plane of a first one of the existing images. Preferably, the reference frame is co-planar with the planar surface. In this case, the transforming of the existing images is achieved by performing a projective transform on a second one of the existing images to bring its image of the planar surface into perspective alignment with the image of the planar surface in the first existing image.Preferably, the image parameter of the new view comprises information sufficient, together with the parallax vectors, to deduce: (a) a trifocal ratio in the reference frame and (b) one epipole between the new viewpoint and one of the first and second viewpoints.

Methods for hierarchical hole-filling and depth adaptive hierarchical hole-filling and error correcting in 2D images, 3D images, and 3D wrapped images are provided. Hierarchical hole-filling can comprise reducing an image that contains holes, expanding the reduced image, and filling the holes in the image with data obtained from the expanded image. Depth adaptive hierarchical hole-filling can comprise preprocessing the depth map of a 3D wrapped image that contains holes, reducing the preprocessed image, expanding the reduced image, and filling the holes in the 3D wrapped image with data obtained from the expanded image. These methods are can efficiently reduce errors in images and produce 3D images from a 2D images and/or depth map information.

Hybrid video decoder supporting intermediate view synthesis of an intermediate view video from a first- and a second-view video which are predictively coded into a multi-view data signal with frames of the second-view video being spatially subdivided into sub-regions and the multi-view data signal having a prediction mode is provided, having: an extractor configured to respectively extract, from the multi-view data signal, for sub-regions of the frames of the second-view video, a disparity vector and a prediction residual; a predictive reconstructor configured to reconstruct the sub-regions of the frames of the second-view video, by generating a prediction from a reconstructed version of a portion of frames of the first-view video using the disparity vectors and a prediction residual for the respective sub-regions; and an intermediate view synthesizer configured to reconstruct first portions of the intermediate view video.

A method and system for real-time rendering within a gaming environment. Specifically, one embodiment of the present invention discloses a method of rendering a local participant within an interactive gaming environment. The method begins by capturing a plurality of real-time video streams of a local participant from a plurality of camera viewpoints. From the plurality of video streams, a new view synthesis technique is applied to generate a rendering of the local participant. The rendering is generated from a perspective of a remote participant located remotely in the gaming environment. The rendering is then sent to the remote participant for viewing.

A technique for computing an image of a virtual view based on a plurality of camera views is presented. One or more cameras provide the plurality of camera views. As to a method aspect of the technique, two or three camera views that at least partially overlap and that at least partially overlap with the virtual view are selected among the plurality of camera views. The image of the virtual view is computed based on objects in the selected camera views using a multilinear relation that relates the selected camera views and the virtual view.

An embodiment of the invention is a method that provides common data and enforces multiple view consistency. In a preferred embodiment, a coordinate alignment matrix is generated after initial warped views are formed. The matrix is used efficiently to repair holes/occlusions when synthesizing final views. In another preferred embodiment, a common background layer is generated based upon initial warped views. Holes are repaired on the common background layer, which can then be used for synthesizing final views. The cost of the latter method is sub-linear, meaning that additional views can be generated with lesser cost. Preferred methods of the invention also use a placement matrix to generate initial warped views, which simplifies warping to a lookup operation.

Original or compressed Auxiliary Data, including possibly major depth discontinuities in the form of shape images, partial occlusion data, associated tuned and control parameters, and depth information of the original video(s), are used to facilitate the interactive display and generation of new views (view synthesis) of conventional 2D, stereo, and multi-view videos in conventional 2D, 3D (stereo) and multi-view or autostereoscopic displays with reduced artifacts. The partial or full occlusion data includes image, depth and opacity data of possibly partially occluded areas to facilitate the reduction of artifacts in the synthesized view. An efficient method is used for extracting objects at partially occluded regions as defined by the auxiliary data from the texture videos to facilitate view synthesis with reduced artifacts. Further, a method for updating the image background and the depth values uses the auxiliary data after extraction of each object to reduce the artifacts due to limited performance of online inpainting of missing data or holes during view synthesis.

The present embodiments include methods, systems, and apparatuses for foreground biased depth map refinement in which horizontal gradient of the texture edge in color image is used to guide the shifting of the foreground depth pixels around the large depth discontinuities in order to make the whole texture edge pixels assigned with foreground depth values. In such an embodiment, only background information may be used in hole-filling process. Such embodiments may significantly improve the quality of the synthesized view by avoiding incorrect use of foreground texture information in hole-filling. Additionally, the depth map quality may not be significantly degraded when such methods are used for hole-filling.

Various implementations are described. Several implementations relate to view synthesis with heuristic view blending for 3D Video (3DV) applications. According to one aspect, at least one reference picture, or a portion thereof, is warped from at least one reference view location to a virtual view location to produce at least one warped reference. A first candidate pixel and a second candidate pixel are identified in the at least one warped reference. The first candidate pixel and the second candidate pixel are candidates for a target pixel location in a virtual picture from the virtual view location. A value for a pixel at the target pixel location is determined based on values of the first and second candidate pixels.

The invention relates to a digital image processing and video coding/decoding technique, specifically a view synthesis predictive coding. The invention aims to solve the technical problems to provide a multi-view video coding method suitable for various camera systems. The multi-view video coding method is characterized in that the method comprises the following steps: a, independently coding video sequences of one or more views by means of motion compensation prediction; b, coding other video sequences by the minimal-cost one prediction mode selected from parallax compensation prediction, view synthesis prediction, and motion compensation prediction. The invention ensures better effect of video coding.

A monocular input image is transformed to give it an enhanced three dimensional appearance by creating at least two output images. Foreground and background objects are segmented in the input image and transformed differently from each other, so that the foreground objects appear to stand out from the background. Given a sequence of input images, the foreground objects will appear to move differently from the background objects in the output images.

The invention discloses a view synthetic method based on the drawing of a depth image. The method comprises that firstly, the depth image is smoothed; and then the three-dimensional image transformation is carried out twice; the first transformation uses a smoothed depth image to obtain an object image comprising a smaller hollow space; the second transformation uses an original depth image to obtain an object image comprising a larger hollow space; then, the two object images are blended based on the object image obtained in the second transformation; hallow space padding is carried out on the object image obtained in blending. The method is characterized in that a zero-one matrix corresponding to the object image is maintained from beginning to end in the process of video synthesis for pointing out whether a certain point in the object image is a hollow point or not; the three-dimensional image transformation is carried out twice in the process of view synthesis, thus guaranteeing that the quality of the image in a non-hollow area is not reduced while the hollow space is eliminated and the authenticity of the image is reserved as far as possible.