我最近开始在Python上学习OpenCV。
我正在参考这个教程,希望能够获得有关获取图像轮廓的一些帮助。
我的代码是 -
import cv2
import numpy as np
img = cv2.imread('shapes.jpg', 0)
img = cv2.medianBlur(img, 5)
thresh = cv2.adaptiveThreshold(img,255,cv2.ADAPTIVE_THRESH_GAUSSIAN_C,\
cv2.THRESH_BINARY,11,2)
cv2.imshow('Thresh', thresh)
cv2.waitKey(0)
cv2.destroyAllWindows()
image, contours, hierarchy = cv2.findContours(thresh.copy(),cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)
cv2.drawContours(image, countours, -1, (0,255,0), 3)
cv2.imshow('Contours', img)
cv2.waitKey(0)
cv2.destroyAllWindows()
第一张阈值处理后的图像已经出现了,但随后我收到了一个错误消息,消息内容如下:
The first thresholded image is appearing, but after that I get an error message as
Traceback (most recent call last):
File "contours.py", line 21, in <module>
image, contours, hierarchy = cv2.findContours(thresh.copy(),cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)
ValueError: need more than 2 values to unpack
任何帮助解决此问题都将不胜感激。