先上效果图：

后面附上源代码：

弯曲

代码：

AdelaiDet-master\adet\data\datasets\text_view.py

# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
import contextlib
import io
import logging
import os

import cv2
from fvcore.common.timer import Timer
from fvcore.common.file_io import PathManager

from detectron2.structures import BoxMode