Here is a list of all modules:
 Alvarez-Mazorra Gaussian convolution | A first-order recursive filter approximation, computed in-place |
| Box filter Gaussian convolution | A fast low-accuracy approximation of Gaussian convolution |
| DCT-based Gaussian convolution | Convolution via multiplication in the DCT domain |
| Deriche Gaussian convolution | An accurate recursive filter approximation, computed out-of-place |
| Extended box filter Gaussian convolution | An improvement of box filtering with continuous selection of sigma |
| FIR Gaussian convolution | Approximation by finite impulse response filtering |
| Stacked integral images Gaussian convolution | A sum of box filter responses, rather than a cascade |
 Vliet-Young-Verbeek Gaussian convolution | An accurate recursive filter approximation, computed in-place |
