Function remosaic 

pub fn remosaic(
    inp: &VipsImage,
    old_str: &str,
    new_str: &str,
) -> Result<VipsImage>

VipsRemosaic (remosaic), rebuild an mosaiced image inp: &VipsImage -> Input image old_str: &str -> Search for this string new_str: &str -> And swap for this string returns VipsImage - Output image