Function broadcast 

pub fn broadcast(
    src: &impl ToInputArray,
    shape: &impl ToInputArray,
    dst: &mut impl ToOutputArray,
) -> Result<()>

Broadcast the given Mat to the given shape.

Parameters

• src: input array
• shape: target shape. Should be a list of CV_32S numbers. Note that negative values are not supported.
• dst: output array that has the given shape