Bi-Quadratic Interpolation of Intensity for Fast Shading of Three Dimensional Objects

摘要

The researchers in the field of computer graphics are often confronted with the trade off between visual realism and computational cost. So far, Phong or Gouraud shading methods have been treated as well established shading methods and attempts have been made to improve visual realism or to reduce computational cost or both. Both these methods use linear interpolation to compute the normals or intensity respectively, at each point on the surface. However, it has been proved that no surface would yield illumination distribution generated by the traditional Phong shading. Attempts have been made to improve the defects of linear interpolation. One such attempt is the use of BiQuadratic normal vector interpolation. In this paper we have made an attempt to achieve the visual realism of the BiQuadratic interpolation method and at the same time we have reduced the cost of shading.