parser = ArgumentParser(description="Segment foreground with OpenCV GrabCut.")
parser.add_argument("image", help="Input image path.")
parser.add_argument("cutout", help="Output PNG path for the transparent cutout.")
parser.add_argument("--rect", required=True, help="Initial rectangle as x,y,width,height.")
parser.add_argument(
    "--foreground-point",
    required=True,
    action="append",
    help="Sure-foreground point as x,y; repeat for separate subject regions.",
)
parser.add_argument(
    "--foreground-stroke",
    action="append",
    default=[],
    help="Sure-foreground stroke as x1,y1,x2,y2,thickness; repeat as needed.",
)
parser.add_argument("--exclude-rect", required=True, help="Sure-background rectangle as x,y,width,height.")
parser.add_argument("--iterations", type=int, default=5, help="Iterations per GrabCut pass.")
args = parser.parse_args()