TypeError: mat data type = 0 is not supported

Question

我想使用 cv2.imshow("Otsu img", binary) 而不是 plt.imshow( binary)

我收到错误消息

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()

如何解决这个错误？

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

Answer 1

可以通过使用

将二进制转换为 dtype=uint8 来纠正 TypeError

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

或使用astype(np.uint8)

更改二进制类型

但在 Original Poster @Redhwan 之间的进一步讨论后，OP 发现了问题并且以下脚本似乎解决了问题：

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()