Function mask_gaussian_band 

pub fn mask_gaussian_band(
    width: i32,
    height: i32,
    frequency_cutoff_x: f64,
    frequency_cutoff_y: f64,
    radius: f64,
    amplitude_cutoff: f64,
) -> Result<VipsImage>

VipsMaskGaussianBand (mask_gaussian_band), make a gaussian filter width: i32 -> Image width in pixels min: 1, max: 10000000, default: 1 height: i32 -> Image height in pixels min: 1, max: 10000000, default: 1 frequency_cutoff_x: f64 -> Frequency cutoff x min: 0, max: 1000000, default: 0.5 frequency_cutoff_y: f64 -> Frequency cutoff y min: 0, max: 1000000, default: 0.5 radius: f64 -> Radius of circle min: 0, max: 1000000, default: 0.1 amplitude_cutoff: f64 -> Amplitude cutoff min: 0, max: 1, default: 0.5 returns VipsImage - Output image