| ::anisotrope_diff | Smooth an image by edge-preserving anisotropic diffusion. |
| ::eliminate_min_max | Smooth an image in the spatial domain to suppress noise. |
| ::eliminate_sp | Replace values outside of thresholds with average value. |
| ::fill_interlace | Interpolate 2 video half images. |
| ::gauss_image | Smooth using discrete gauss functions. |
| ::info_smooth | Information on smoothing filter ::smooth_image. |
| ::mean_image | Smooth by averaging. |
| ::mean_n | Average gray values over several channels. |
| ::mean_sp | Suppress salt and pepper noise. |
| ::median_image | Median filtering with different rank masks. |
| ::median_separate | Separated median filtering with rectangle masks. |
| ::median_weighted | Weighted median filtering with different rank masks. |
| ::midrange_image | Calculate the average of maximum and minimum inside any mask. |
| ::rank_image | Smooth an image with an arbitrary rank mask. |
| ::sigma_image | Non-linear smoothing with the sigma filter. |
| ::smooth_image | Smooth an image using recursive filters. |
| ::trimmed_mean | Smooth an image with an arbitrary rank mask. |