Function `fast_blur`

fn fast_blur<P: Pixel>(image_buffer: &ImageBuffer<P, Vec<<P as >::Subpixel>>, sigma: f32) -> ImageBuffer<P, Vec<<P as >::Subpixel>>

Approximation of Gaussian blur after Kovesi, P.: Fast Almost-Gaussian Filtering The Australian Pattern Recognition Society Conference: DICTA 2010. December 2010. Sydney.