Update generating images example.
Update generating images example.

unrealcv/unrealcv,unrealcv/unrealcv,qiuwch/unrealcv,qiuwch/unrealcv,unrealcv/unrealcv,unrealcv/unrealcv,qiuwch/unrealcv,qiuwch/unrealcv,unrealcv/unrealcv,qiuwch/unrealcv,qiuwch/unrealcv