Function imageproc::integralimage::column_running_sum

pub fn column_running_sum(
    image: &GrayImage, 
    column: u32, 
    buffer: &mut [u32], 
    padding: u32
)

Computes the running sum of one column of image, padded at the top and bottom. The padding is by continuity. Takes a reference to buffer so that this can be reused for all columns in an image.