Function `unsharpen`

pub fn unsharpen<I, P, S>(image: &I, sigma: f32, threshold: i32) -> ImageBuffer<P, Vec<S>>
where
    I: GenericImageView<Pixel = P>,
    P: Pixel<Subpixel = S> + 'static,
    S: Primitive + 'static,

Performs an unsharpen mask on the supplied image.

Arguments:

sigma - is the amount to blur the image by.
threshold - is the threshold for minimal brightness change that will be sharpened.

This method typically assumes that the input is scene-linear light. If it is not, color distortion may occur.

See Digital unsharp masking for more information.