A modified version of the Bezier-Bernstein polynomial approximation technique has been developed which gives local control of data points depending on an absolute error criterion. Based on this concept, two algorithms for coding a gray-tone image have been formulated. Error bounds have been developed which are used to approximate gray segments of pixels. These bounds are determined by the desir...

This paper presents the design and implementation of an application specific integrated circuit (ASIC) for real-time rasterization of characters described by their outline based on vertical scan-conversion and flag fill algorithms. The chip acts as a coprocessor which rasterizes outline fonts given by Bezier splines and straight line segments. It generates high quality fonts at a rate 30 times ...

In this paper we discuss 3D rendering as a solution to the line crossing problem associated with using connecting lines for illustrating relations in visual programming. The Bezier tube was introduced for modeling connecting lines in general and hyperedges in specific and an algorithm is given for laying out hyper-edges. 3D hyperedges are shown to have features that enhance their readability ov...

This paper presents a face modelling system that can define and manipulate the geometry of a human face in real-time. The system uses a three-level representation that allows the user to modify the parameters using intuitive commands on the highest level, while the geometry is described by Bezier patches and triangles on the lowest level. A critical design issue of such a system is to find a re...

In this paper the problem of reconstruction of video frames is addressed, when there are missing pixels in each video frame or is corrupted with noise and also the locations of corrupted pixels are not known. The modified data can be corrected using Forward Error Correcting Codes. Forward Error correcting codes detect and correct errors with the help of complex decoders. This work proposes a ne...

In extending the planar methods to spatial bases, the algorithms require no modifications, as the algorithms are defined abstractly in terms of affine combinations with no regard to the location of the point as two dimensional or three dimensional (or even higher dimensional). In fact, the constructions of Bezier curves and Bezier splines work exactly as before. All that we need to do is supply...

-Most of the CAD software, which are available currently, works only on the operating system (generally windows) for which they are designed. Alternatively, the commercial CAD software is dependent upon the operating system. If CAD software is designed such that it is Independent of the operating system, then such CAD software will be much beneficial for the present scenario of the CAD software...