pub fn filter3x3<I, P, S>(image: &I, kernel: &[f32]) -> ImageBuffer<P, Vec<S>> where
I: GenericImageView<Pixel = P>,
P: Pixel<Subpixel = S> + 'static,
S: Primitive + 'static, Expand description
Perform a 3x3 box filter on the supplied image.
kernel is an array of the filter weights of length 9.