Flexible defocus blur for stochastic rasterization

摘要

User-controllable defocus blur for a stochastic rasterizer may be implemented by modifying circle of confusion coefficients per vertex to express more general defocus blur. The method can be applied to limit the foreground blur, extend the in-focus range, simulate tilt-shift photography, and specify per-object defocus blur. Furthermore, with two simplifying assumptions, existing triangle coverage tests and tile culling tests can be used with very modest modifications.

主权项

1. A method comprising:
enabling a user of a graphics processor to specify two circle of confusion coefficients, each coefficient for a different time, for each vertex in a mesh per frame; and making a clip space circle of confusion radius of a vertex a linear function of time within a frame.