R. Victor Klassen

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Forward differencing is widely used to generate rapidly large numbers of points at equally space parameter values along a curve. A failing of forward differencing is the tendency to generate many extraneous points for curves with highly nonuniform parameterizations. A key result is presented and proven, namely, that a few levels of subdivision, prior to(More)
The technique of placing directed line segments at grid points, known as hedgehogging, has been used for some time as a tool for visualizing two dimensional vector fields. We provide a means of rapidly rendering a slice of a three dimensional field, suitable for a bilevel display. Shape and shadowing are used to disambiguate orientation. Liberal use of(More)
Two incremental cubic interpolation algorithms are derived and analysed. Each is based on a known linear interpolation algorithm and modified for third order forward differencing. The tradeoff between overflow avoidance and loss of precision has made forward differencing a method which, although known to be fast, can be difficult to implement. It is shown(More)
Many high end printing systems store and/or transmit compressed images to save bandwidth, memory, and disk space. Prior to printing, the system will decompress and then color correct the image to compensate for the characteristics of a particular printer. In the conventional architecture, the decompression step converts the image from some encoded format(More)