A-Trous Wavelet Filter

Computer Graphics · Denoising · 2010 · a-trous-filter.yaml

Applies a small kernel repeatedly with exponentially increasing sample spacing, reaching a wide filter in a few passes instead of one enormous kernel.

• supersedescorrects · extends
• classifiesspecializes · part-of
• substitutes forapproximates · alternative-to
• depends onrequires · validates

Colour is the family; a dashed line is the second member of it.

This node

• approximatesis a cheaper stand-in for Bilateral Filterwide support in a few sparse passes, not one big kernel

Referenced by

• extendsSpatiotemporal Variance-Guided Filtering adds capability to thisdrives filter width from measured variance

References

• Edge-Avoiding A-Trous Wavelet Transform for Fast Global Illumination Filtering — Dammertz, Sewtz, Hanika, Lensch — 2010
• Background — Stationary wavelet transform on Wikipedia