Image data processing apparatus and image data processing method for a video conference system
First Claim
1. A data processing apparatus for generating image data representative of a visually perceptible pattern drawn inside a two-dimensional visualization area by visualizing means being moved therein so as to designate locations in a designated sequence within the area, said data processing apparatus comprising:
- inputting means for inputting first image data including a plurality of first location data which denote, with a first precision, the locations designated by said visualizing means in said designated sequence within said visualization area;
transforming means for transforming said first location data included in said first image data input by said inputting means, into second location data with a second precision lower than said first precision, therein generating second image data, wherein said second precision based upon resolution of an output device;
change detecting means which, given said second location data in said second image data generated by said transforming means, detects those pieces of second location data which are changed in keeping with said designated locations being moved, therein generating third image data, including the detected second location data, in said designated sequence; and
transmitting means for transmitting said third image data, generated by said change detecting means, in a camera control data part of a communication format.
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Abstract
This invention provides a data processing apparatus and a data processing method for reducing the amount of image data denoting a pattern drawn on a whiteboard by a pen or the like being moved so as to designate locations in a designated sequence. Specifically, a coordinate transformation circuit transforms first-precision coordinate data within first image data into coordinate data of a second precision lower than the first precision, thereby generating second image data. Given the coordinate data in the second image data, a changing point detection circuit detects the coordinate data that are changed in keeping with the locations being designated movably by the pen on the whiteboard, thereby generating third image data including the detected coordinate data in the designated sequence.
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Citations
8 Claims
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1. A data processing apparatus for generating image data representative of a visually perceptible pattern drawn inside a two-dimensional visualization area by visualizing means being moved therein so as to designate locations in a designated sequence within the area, said data processing apparatus comprising:
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inputting means for inputting first image data including a plurality of first location data which denote, with a first precision, the locations designated by said visualizing means in said designated sequence within said visualization area; transforming means for transforming said first location data included in said first image data input by said inputting means, into second location data with a second precision lower than said first precision, therein generating second image data, wherein said second precision based upon resolution of an output device; change detecting means which, given said second location data in said second image data generated by said transforming means, detects those pieces of second location data which are changed in keeping with said designated locations being moved, therein generating third image data, including the detected second location data, in said designated sequence; and transmitting means for transmitting said third image data, generated by said change detecting means, in a camera control data part of a communication format. - View Dependent Claims (2, 3, 4)
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5. A data processing method for generating image data representative of a visually perceptible pattern drawn inside a two-dimensional visualization area by visualizing means being moved therein so as to designate locations in a designated sequence within the area, said data processing method comprising the steps of:
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inputting first image data including a plurality of first location data which denote, with a first precision, the locations designated by said visualizing means in said designated sequence within said visualization area; transforming said first location data included in said first image data, into second location data with a second precision lower than said first precision, therein generating second image data, wherein said second precision based upon resolution of a display device; detecting those pieces of second location data which are changed in keeping with said designated locations being moved, of said second location data in said second image data generated in said transforming step, therein generating third image data including the detected second location data in said designated sequence; and transmitting said third image data, generated in said detecting step, in a camera control data part of a communication format. - View Dependent Claims (6, 7, 8)
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Specification