Python exceptions.TypeError: src 不是一个 numpy 数组，也不是一个标量
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exceptions.TypeError: src is not a numpy array, neither a scalar
提问by Anjali Changlani
import cv2
import numpy as np
def imageMoments(img):
#Single channel(8 bit or floating point 2D array)
read_original = cv2.imread(img)
ret,thresh = cv2.threshold(img, 127, 255, 0)
contours, hierarchy = cv2.findContours(thresh, cv2.RETR_LIST, cv2.CHAIN_APPROX_NONE)
cnt = contours[0]
M = cv2.moments(cnt)
print M
cx = int(M['m10']/M['m00'])
cy = int(M['m01']/M['m00'])
return
I get the error
我收到错误
src is not a numpy array, neither a scalar
回答by John1024
cv2.thresholdrequires a gray-scale imagefor an argument, not a string representing a filename. Thus, replace:
cv2.threshold参数需要灰度图像，而不是表示文件名的字符串。因此，替换：
read_original = cv2.imread(img)
ret,thresh = cv2.threshold(img, 127, 255, 0)
With:
和：
read_original = cv2.imread(img)
imgray = cv2.cvtColor(read_original,cv2.COLOR_BGR2GRAY)
ret,thresh = cv2.threshold(imgray, 127, 255, 0)
In the original code, the string imgis passed as an argument to threshold. In the revised code, the argument to thresholdis instead a gray-scale image, imgray.
在原始代码中，字符串img作为参数传递给threshold. 在修改后的代码中， 的参数threshold是灰度图像，imgray。
