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关于第13节的一些bug调正分享 #9

@LINGoodfellow

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@LINGoodfellow

首先谢谢作者,分享如此干货
貌似OpenCV 3.X 之后findContours()就返回两个参数了,所以如果出bug,可以尝试改成
contours, hierarchy = cv2.findContours(
thresh, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)

后面得改成for cnt in contours:
cv2.drawContours(img, [cnt], 0, (0, 0, 255), 2)
不然会出现,只识别了‘1’或者'3'单个数字轮廓的情况

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