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python - TypeError：不支持 mat 数据类型 = 0

问题描述

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

如何修复此错误？

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

标签： pythonpython-2.7opencvimage-processingimshow

解决方案

TypeError 可以通过将二进制转换为dtype=uint8using 来纠正，

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

或通过使用更改二进制文件的类型astype(np.uint8)

但是在 Original Poster @Redhwan之间进一步讨论后，OP 发现了问题，以下脚本似乎解决了这个问题：

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()

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