Showing papers on "Video tracking published in 1979"

Interactive video production system and method

Abstract: The present invention relates to video production systems and methods and particularly to such systems and methods in which the video characteristics of the video frames may be interactively controlled during video production.

Method and system for generating moving objects on a video display screen

Abstract: A number of moving objects and stationary playfield objects are generated on a video display screen by sharing memory and circuitry on both a physical and time-share basis. Video graphics data for playfield and motion objects is stored in a read-only memory (ROM). An object attribute memory, which may be updated at any time, is scanned during each horizontal retrace interval to provide information used to selectively read moving object video data from the ROM and assemble and store a complete horizontal line of moving object video graphics data in a separate staging memory. During active scan time of the horizontal video display line, the assembled line of moving object video data is accessed from the staging memory and communicated to the display screen via appropriate video circuitry to produce the video of the moving objects. At the same time, the object attribute memory is accessed for playfield object information which, in turn, is used to address the video graphics ROM to produce the actual video image of playfield objects. The video image of playfield objects so obtained is also communicated to the display screen through the video circuits.

Interactive video playback system

Abstract: Video images derived from a video recording medium (such as a video disc or tape) using a video playback unit are displayed on the screen of a cathode ray tube display simultaneously with video images generated from a microprocessor-controlled video game. The video game permits a user to manually control the position of some of the generated video images displayed. Signals in the horizontal interval portion of each field from the video playback unit are related to the video images in the pictorial portion of each such field and identify certain characteristics of the video images such as the location of the video images. This information is used in such a manner that the video images from the video playback unit can interact with the video images from the video game.

Digital video display systems and dynamic graphics

Abstract: Most digital video display systems have been capable of producing only text or static imagery. This paper shows that these limitations are not intrinsic to the technology, but are rather a direct consequence of the display system architecture. The paper begins by summarizing some of the background required to understand digital video display systems. The state-of-the-art is then surveyed, supported by an extensive bibliography. Existing systems are described in terms of a methodology which clarifies the effect of system architecture on capabilities and performance. It is shown how dynamic graphics capabilities can be provided if systems adhere to one or the other of two possible architectures. Examples of such systems are presented.

Algorithm development for real-time automatic video tracking systems

Abstract: The development of algorithms for real-time, automatic systems capable of tracking 2-D targets in complex scenes is discussed. The problems and constraints involved in such an undertaking as well as previous efforts are summarized. in addition, a mathematical model of scene spatial and temporal evolution is developed for certain classes of targets and target perturbations. It is shown that for small target perturbations the 2-D tracking problem may be approximated as a 1-D time-varying parameter estimation problem. Algorithms resulting from several estimation approaches are discussed.

Computer generated display of images of simulated objects on a video display device

Abstract: There is disclosed, in a fire control combat simulator, a novel computer-generated video display for displaying a simulated field of view. Electronic generation of the display is accomplished by a system which includes a host computer, a plurality of object generators, and related circuitry. Each object generator contains a memory which stores the image of an object which may be displayed on the video display. The host computer assigns locations in the scene to the objects of each object generator. Each object generator includes its own microprocessor which performs calculations based on its own object information and position and range information received from the host computer to provide appropriate video signals for the display. The related circuitry of the system includes a blanking and count generator which provides signals whereby the color video information from the object generator is displayed on the video display and it also establishes times for permitting updating of the information bet. ween the host computer and the object generators. Further features include a priority chain linking the object generators which, if an overlap situation occurs where more than one object generator is calling for its information to be displayed in the same location on the video display, the object which has been assigned a higher priority, indicating that it is at a closer ranoe than others, has its overlap information displayed on the video display instead of those of lower priority. Another feature is the data compression scheme employed to store the object image in each object generator. Other features are also disclosed and claimed.

Video track transfer system and method

Abstract: TV playback apparatus and method for a record having track sets comprising video track analogs and a plurality of audio track analogs disposed between the video tracks. All tracks in a respective track set are sensed for playback by a movable reading head incorporating a combination of video and audio sensing elements and including tracking of homing elements flanking the video reading element. A track set switching signal is sensed from the audio signal by an audio reading element for a controller means which very quickly slews the reading head to roughly position the video reading element for next video track. Such video track is sensed by any reading element in the reading head and determined through a multiplexer and controller means. Reading head is further stepped as necessary until video track sensing element is reading video track as controller receives video signal through band pass filter video sensing element. Position adjustment further made by controller, only as necessary, responsive to respective signals by tracking elements. The entire switching cycle from one video track to next is completed in substantially less time than attainable by any previously known prior art method or apparatus.

Control information detecting method and apparatus in optical-type video disc player

Abstract: For focus and tracking controls for a pickup of an optical-type video disc player, wobbles are simultaneously applied to focus and tracking adjustment mechanisms. The wobble for focus and the wobble for tracking are effected by two signals 90° phase-shifted from each other. The respective informations representative of focus and tracking errors are separately detected in a synchronous detection manner using the same two signals to provide focus and tracking control signals.

Analysis of time-varying video information

Abstract: Deriving quantitative information from time-varying signals recorded on video tape can be cumbersome. This paper discusses an interface between a hybrid computer and a video integrator that quantifies in formation from a portion of the video signal which is variable in size and location within the television raster.

Multi-object tracking via a recursive generalized likelihood approach

Abstract: This paper deals with the problem of tracking multiple objects with multiple sensors where the association of measurements with objects is ambiguouus. Object motion is modeled as a random process moving locally about a mean path where the random process model can be one of a discrete set of possibilities. In the above setting, the tracking problem amounts to associating data with objects, selecting motion models for the objects and estimating the object state. The multi-object tracking problem is solved using the generalized likelihood approach. No a priori statistical information is used concerning the correctness of a data association hypothesis. A practical recursive algorithm is described that has been successfully applied to large scale surveillance problems.

Video Data Processor (VIDAP): A Real-Time Video Data Compressor

Abstract: A monolithic digital Hadamard transform device is used to reduce complexity in a real -time video datacompression system. The Video Data Processor (VIDAP) system is designed to permit variable framerates, sampling resolutions, and compression ratios. Versatility is incorporated through a modulardesign which permits tailoring to meet a wide range of video data link applications. Emphasis has been placed on a low cost, low power design suitable for airborne systems. Introduction In recent years there has been a great deal of interest in real -time video compression systems. This interest has been prompted by the consideration of diverse applications ranging from commercial video to communications systems involving remote viewing. The latter class of applications dictates the use ofultra light, very low power video data processing units to meet the needs of mobile platforms. The Video Data Processor (VIDAP) was conceived to satisfy these requirements.Real -time video data links for remote viewing have several unique requirements.

Experimental and simulation study results for video landmark acquisition and tracking technology

Abstract: A synopsis of related Earth observation technology is provided and includes surface-feature tracking, generic feature classification and landmark identification, and navigation by multicolor correlation. With the advent of the Space Shuttle era, the NASA role takes on new significance in that one can now conceive of dedicated Earth resources missions. Space Shuttle also provides a unique test bed for evaluating advanced sensor technology like that described in this report. As a result of this type of rationale, the FILE OSTA-1 Shuttle experiment, which grew out of the Video Landmark Acquisition and Tracking (VILAT) activity, was developed and is described in this report along with the relevant tradeoffs. In addition, a synopsis of FILE computer simulation activity is included. This synopsis relates to future required capabilities such as landmark registration, reacquisition, and tracking.

Method for tracking object under use of object tracking system, involves employing different characteristics or changes of characteristic of object on one hand and object environment on other hand to find local demarcation

Abstract: The method involves employing different characteristics or changes of characteristic of an object on one hand and the object environment on the other hand to find a local demarcation between object portion and environment portion. The visible portions of the object of foremost and background disturbing influences are separated.