| 摘要 |
<p>An image representation using a structured object may be readily manipulated by a computer. This image representation can represent more complex images where the structured object defines a boundary for which image values near the boundary in a region are defined by a function called an edge characteristic function. The edge characteristic function is applied by determining, for each point in the region, a point on the boundary to which the given point is closest, herein called an anchor, and a distance to that point. Different edge characteristic functions may be assigned to different points along the boundary. In one embodiment, edge characteristic functions are assigned to selected for characteristic points on the boundary. These edge characteristic functions may be interpolated to provide edge characteristic functions for remaining points along the boundary. Each point not on the boundary is processed according to the edge characteristic function of the point on the boundary to which it is closest and according to the distance to that point. An edge characteristic function may also be a function of other factors. This image representation provides many benefits including the ability to generate more complex images which can then be manipulated more easily or be converted from different image formats. One form of manipulation is interpolation over time. In image compositing, this image representation also allows for easy attenuation of various effects over regions in a controlled way.</p> |
