Reconstruction of missing data point from sparse samples during graphics processing using cubic spline polynomials

摘要

A graphics system includes a reconstruction unit that utilizes higher order polynomials, such as cubic splines, to reconstruct missing pixel data. The computational work to perform interpolation with higher order polynomials, such as cubic splines, is reduced by pre-calculating weights for each sparse sample pattern. The pre-calculated weights may be stored as stencils and used during runtime to perform interpolation.

主权项

1. A method of performing graphics processing, comprising:
selecting at least one tile of a graphics image to be sampled; selecting a sample pattern to sample the at least one tile of a graphics image; rendering pixel data of the sampled at least one tile; and performing, at runtime, reconstruction of missing pixel data in the sampled at least one tile using cubic spline interpolation; wherein the cubic spline interpolation is performed using pre-computed weights to compute pixel color values as a weighted sum of known pixel color values including accumulating products of the pre-computed weights and color values with a multiplier/adder and normalizing the accumulated product.