Abstract:
Methods and systems for surveillance are described. One described method for use in a surveillance system having a camera, comprises generating a background image of the camera's field of regard, receiving a live video image of the camera's current field of view, wherein the field of view is within the field of regard, and correlating a position of the live video image within the background image.
Abstract:
Methods and systems for surveillance are described. One described method for use in a surveillance system having a camera, comprises generating a background image of the camera's field of regard, receiving a live video image of the camera's current field of view, wherein the field of view is within the field of regard, and correlating a position of the live video image within the background image.
Abstract:
An electronic billboard replacement system for use in a TV broadcast system including electronic billboard storage means for storing a plurality of replacement billboards and comprising electronic sequencer means for controlling the time period that each one of said plurality of replacement billboards is displayed to a TV viewer.
Abstract:
This invention discloses an apparatus (90) for replacing a portion of each of a sequence of existing images with a new image, the apparatus comprises a frame grabber (110) operative to grab a sequence of frames respectively representing the sequence of existing images, a localizer (120) operative to detect at least one site within each existing image at which the new image is to be incorporated, a perspective transformer (120) operative to detect the perspective at which the site is imaged and a transmitter (95) operative to transmit to each of a plurality of remote locations (94), for each frame the existing image represented in the frame, the coordinates of the site, and the perspective at which the site is imaged.
Abstract:
A narrow bandwidth broadcasting system for transmission of video and television via low bandwidth medium such as internet or radio links. To save bandwith, video scenes are separated into foreground and background objects and only foreground objects are sent to the viewers. However, graphical model or real image may be sent as a reference background and updated according to its own movement. The broadcast system also captures the video camera identification, position, orientation and field of view size for each video fields and sends it together with the foreground object to the viewer. The broadcast system also includes an object tracking apparatus, which captures the position in space of objects that appear in the scene. Shuch parameters allow the implementation of a 3-dimensional rendering at the receiver side.
Abstract:
Apparatus for automatic electronic replacement of a billboard in a video image including an automatic camera orientation measurement apparatus including motion measurement means operative to measure the Field of View (FOV) of the TV camera relative to a known reference position.
Abstract:
This invention discloses an apparatus for replacing a portion of each of a sequence of existing images with a new image, the apparatus comprises a frame grabber operative to grab a sequence of frames respectively representing the sequence of existing images, a localizer operative to detect at least one site within each existing image at which the new image is to be incorporated, a perspective transformer operative to detect the perspective at which the site is imaged and a transmitter operative to transmit to each of a plurality of remote locations, for each frame the existing image represented in the frame, the coordinates of the site, and the perspective at which the site is imaged.
Abstract:
A chromakeying panel (20) for use in conjunction with a chromakeying system (10, 14, 50, 60) is disclosed (see figure). The panel (20) comprises a color pattern (40) having plurality of first locations bearing a first color within the color keying spectrum and a plurality of second locations bearing a second color within the color keying spectrum.
Abstract:
It is provided a method for generating a 3D representation of a scene, initially represented by a first video stream captured by a certain camera at a first set of viewing configurations. The method includes providing video streams compatible with capturing the scene by cameras, and generating an integrated video stream enabling three-dimensional display of the scene by integration of two video streams. The method includes calculating parameters characterizing a viewing configuration by analysis of elements having known geometrical parameters. The scene may be a sport scene which a playing field, a group of on- field objects and a group of background objects. The method includes segmenting a frame to those portions, separately associating each portion to the different viewing configuration, and merging them into a single frame. Also, the method may include calculating of on-field footing locations of on-field objects, computing new locations in a new frame, and transforming the on-field objects to the respective frame as a 2D object. Furthermore, the method may include synthesizing at on-field objects by segmenting portions of the object from respective frames of the first video stream, stitching the portions together and rendering the stitched object within a synthesized frame.
Abstract:
A computer generated character is inserted into a video film by selection of a sequence from the video, the selector sequence having selected feature points in the first, last and intermediate frames of the sequence, manual insertion of the character into the first and last frames of the sequence and by automatic calculation using the feature points and reference points on the computer generated character, the position of the character in each intermediate frame of the sequence is determined.