Image analysis – Image transformation or preprocessing – Changing the image coordinates
Reexamination Certificate
1999-01-29
2002-05-28
Mehta, Bhavesh (Department: 2621)
Image analysis
Image transformation or preprocessing
Changing the image coordinates
C382S299000, C382S295000, C345S660000, C345S661000, C348S561000
Reexamination Certificate
active
06396962
ABSTRACT:
FIELD OF INVENTION
The present invention relates generally to the field of image display methods and apparatus and more particularly to the application of image zooming technologies to video display.
BACKGROUND OF INVENTION
With the substantial increase in processing power for personal computers realized in the recent past, it has become possible for such computers to generate and display very complex graphical images. Concomitantly, the development of efficient algorithms for compression of video signals has made possible digitizing of a video stream into a computer file which can be transmitted over relatively limited bandwidth transmission paths and displayed as a graphical image on such a computer. However, due to both transmission path and processor limitations, the display of the video image at the computer is typically restricted to a small portion of the available display area—e.g., an area of 240×160 pixels. It would often be desirable from a user's perspective to be able to view the received video image at a larger size. While a limited re-sizing capability is known in the present art, it does not provide a smooth transition from one size to another, and does not permit a concurrent panning and re-sizing of the image.
SUMMARY OF INVENTION
A method is provided for transforming a video file provided to a computer into an object in a zooming universe established in such computer, which zooming object may be enlarged and panned by manipulation by a user via a computer input device. In particular, a video file is opened in a known video player library on such a computer. At the same time a zooming engine is enabled on the computer and a zooming universe is enabled therefrom. Frames of the video file being played on the computer video player library are copied to a video object in the zooming universe and displayed there. By manipulation of the parameters of the bounding box enclosing the zooming video object, through use of a computer input device, the user is able to scale and pan the video image in the zooming universe display up (or down) to a desired viewing size and perspective.
In a further embodiment of the invention, a method is provided in the zooming universe for providing a scaling of the video image according to user direction without also scaling text or other material external to the video but overlaying the video image. According to that embodiment, the video image object in the zooming universe is periodically “damaged” to cause the “paint” program operating to display the image to repaint the image. Such periodic damaging of the video object will occur at a repetition rate sufficient to cause a viewer to perceive the video image as continuous.
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Cunningham Kathleen
Haffey Samuel F.
Nehme Jad
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