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Real time coding of hand drawn curves Szeliski, Richard Stephen
Abstract
This thesis examines some techniques for the real-time coding of hand drawn curves. These curves are drawn on a data tablet or other graphical input device. As they are drawn, they are coded for transmission over a digital link and reconstructed at a receiving terminal. The real time requirement allows this system to be used for instant graphical communications. One possible application is as a sketchpad facility to aid telephone conferencing. The techniques examined involve sending selected control points along the curve, and using an interpolating function for reconstruction. The interpolator used is the two dimensional parametric cubic spline. Several members of this class of functions are introduced and evaluated. An existing technique for generating the control points (subsampling) is reviewed, and a new shape dependant algorithm is proposed. Automated curve fitting based on information in the original curve is examined. Test runs are made using the various techniques, and conclusions drawn.
Item Metadata
Title |
Real time coding of hand drawn curves
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1981
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Description |
This thesis examines some techniques for the real-time coding of hand drawn curves. These curves are drawn on a data tablet or other graphical input device. As they are drawn, they are coded for transmission over a digital link and reconstructed at a receiving terminal. The real time requirement allows this system to be used for instant graphical communications. One possible application is as a sketchpad facility to aid telephone conferencing.
The techniques examined involve sending selected control points along the curve, and using an interpolating function for reconstruction. The interpolator used is the two dimensional parametric cubic spline. Several members of this class of functions are introduced and evaluated. An existing technique for generating the control points (subsampling) is reviewed, and a new shape dependant algorithm is proposed. Automated curve fitting based on information in the original curve is examined. Test runs are made using the various techniques, and conclusions drawn.
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Genre | |
Type | |
Language |
eng
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Date Available |
2010-03-29
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0095253
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.