TypeError：不支持mat数据类型= 0

Question

我想用cv2.imshow("Otsu img", binary)代替plt.imshow( binary)

我得到了错误

完整代码：

import matplotlib.pyplot as plt
from skimage import io
from skimage.filters.rank import entropy
from skimage.morphology import disk
import numpy as np
from skimage.filters import threshold_otsu
import cv2

img = io.imread("scratch.jpg")
entropy_img = entropy(img, disk(10))
thresh = threshold_otsu(entropy_img)

binary = entropy_img <= thresh



cv2.imshow("Otsu img", binary)

cv2.waitKey(0)
cv2.destroyAllWindows()

如何解决此错误？

 cv2.imshow("Otsu img", binary)
TypeError: mat data type = 0 is not supported

Answer 1

可以通过将二进制文件转换为dtype=uint8来纠正TypeError，

binary = np.asarray(binary, dtype="uint8")

或通过使用astype(np.uint8)更改二进制的类型

但是经过原始海报@Redhwan之间的进一步讨论，OP确认了问题，并且以下脚本似乎可以解决问题：

import matplotlib.pyplot as plt
from skimage import io
from skimage.filters.rank import entropy
from skimage.morphology import disk
import numpy as np
from skimage.filters import threshold_otsu
import cv2

img = cv2.imread("scratch.jpg", 0)
entropy_img = entropy(img, disk(10))
# print type(entropy_img), entropy_img
thresh = threshold_otsu(entropy_img)
# print thresh
# binary = entropy_img <= thresh
ret1, th1 = cv2.threshold(entropy_img, thresh, 255, cv2.THRESH_BINARY_INV)
# print type(entropy)


cv2.imshow("Otsu img", img)
cv2.imshow("Otsu th2", th1)
# cv2.imshow("OTSU Gaussian cleaned", th3)
# cv2.imshow("OTSU median cleaned", th4)
cv2.waitKey(0)
cv2.destroyAllWindows()