Python 如何删除不必要的轮廓？

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你好，第一张图，图上有突起，我不想得到这些轮廓。我想要的结果轮廓在第二张图片中。我正在等待您的帮助，谢谢。

这是一种方法：

填充轮廓线。对图像进行形态学打开以去除小叶子，并从最后一张图像中减去被侵蚀的图像，以仅保留其轮廓

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尝试轮廓近似。根据需要调整ε

# epsilon is the maximum distance from contour to approximated contour. It is an accuracy parameter. 
# A wise selection of epsilon is needed to get the correct output.
epsilon = 0.1 * cv2.arcLength(contour, True)

approx_contour = cv2.approxPolyDP(contour, epsilon, True)

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另存为.svg并在Illustrator/Affinity中编辑？上帝保佑你兄弟：）

# epsilon is the maximum distance from contour to approximated contour. It is an accuracy parameter. 
# A wise selection of epsilon is needed to get the correct output.
epsilon = 0.1 * cv2.arcLength(contour, True)

approx_contour = cv2.approxPolyDP(contour, epsilon, True)