Function minimum_filter 

pub fn minimum_filter<A, D>(
    data: &ArrayRef<A, D>,
    size: usize,
    mode: BorderMode<A>,
    origin: isize,
) -> Array<A, D>
where
    A: Copy + Num + PartialOrd + ScalarOperand + FromPrimitive,
    D: Dimension,

Calculate a multidimensional minimum filter.

• data - The input N-D data.
• size - Length along which to calculate 1D minimum.
• mode - Method that will be used to select the padded values. See the CorrelateMode enum for more information.
• origin - Controls the placement of the filter on the input array’s pixels. A value of 0 centers the filter over the pixel, with positive values shifting the filter to the left, and negative ones to the right.