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-Fast Fourier Transforms, converts image into a frequency spectrum that can be manipulated.
- Fast isotropic smoothing-contrast to using box filters. Different filter sizes and thus degrees of smoothing available
- Edge detection thus edge smoothing
- Adaptive noise suppression, linear smoothing only reduces noise level and smoothes edges, signal-to-noise ratio not improved. CVB uses inhomogeneous diffusion-an adaptive filter that diminishes smoothing at significant edges and corners while still smoothing other areas
- Steerable filters-steerable smoothing, steerable direction, steerable edge detection
- General Convolution Filters can be used to convolute image with any user-supplied kernel
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