Constant-Time Filtering Using Shiftable Kernels

@article{Chaudhury2011ConstantTimeFU,
  title={Constant-Time Filtering Using Shiftable Kernels},
  author={Kunal Narayan Chaudhury},
  journal={IEEE Signal Processing Letters},
  year={2011},
  volume={18},
  pages={651-654}
}
It was recently demonstrated in that the nonlinear bilateral filter can be efficiently implemented using a constant-time or O(1) algorithm. At the heart of this algorithm was the idea of approximating the Gaussian range kernel of the bilateral filter using trigonometric functions. In this letter, we explain how the idea in can be extended to few other linear and nonlinear filters . While some of these filters have received a lot of attention in recent years, they are known to be computationally… CONTINUE READING
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