A huge kernel that cannot be replicated with a single Gaussian blur pass.
A large kernel that matches a 127x127 Gaussian blur kernel.
A medium sized kernel that matches a 63x63 Gaussian blur kernel.
A small kernel that matches a 25x25 Gaussian blur kernel.
A very large kernel that matches a 391x391 Gaussian blur kernel.
A very small kernel that matches a 7x7 Gaussian blur kernel.
An enumeration of blur kernel sizes.