Function mask_gaussian_ring_with_opts 

pub fn mask_gaussian_ring_with_opts(
    width: i32,
    height: i32,
    frequency_cutoff: f64,
    amplitude_cutoff: f64,
    ringwidth: f64,
    mask_gaussian_ring_options: &MaskGaussianRingOptions,
) -> Result<VipsImage>

VipsMaskGaussianRing (mask_gaussian_ring), make a gaussian ring 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: f64 -> Frequency cutoff min: 0, max: 1000000, default: 0.5 amplitude_cutoff: f64 -> Amplitude cutoff min: 0, max: 1, default: 0.5 ringwidth: f64 -> Ringwidth min: 0, max: 1000000, default: 0.5 mask_gaussian_ring_options: &MaskGaussianRingOptions -> optional arguments returns VipsImage - Output image