openCV3:在opencv中对图像进行形态转换时未获得预期的输出 [英] openCV3: Not getting the expected output on morphologically transforming an image in opencv
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问题描述
我正尝试对图像进行大礼帽形态转换,但由于某种原因未获得预期的输出.
I am trying to do top hat morphological transformation to an image but not getting the expected output for some reason.
# Top Hat: difference between input image and opening
kernel = np.ones((5,5),np.float32)/25
tophat = cv2.morphologyEx(img, cv2.MORPH_TOPHAT, kernel)
plt.subplot(121),plt.imshow(img, cmap='gray'),plt.title('Original')
plt.xticks([]), plt.yticks([])
plt.subplot(122),plt.imshow(tophat, cmap='gray'),plt.title('Top Hat')
plt.xticks([]), plt.yticks([])
plt.show()
期望是什么
我正在得到什么
添加了内核.
推荐答案
kernel = cv2.getStructuringElement(cv2.MORPH_RECT, ksize=(9,9))
tophat = cv2.morphologyEx(image, cv2.MORPH_TOPHAT, kernel)
有关详细信息,请阅读以下内容:
For details please read the following:
https://docs.opencv.org/3.3.1 /d9/d61/tutorial_py_morphologic_ops.html
https://docs.opencv.org/3.3 .1/d4/d86/group__imgproc__filter.html#gac342a1bb6eabf6f55c803b09268e36dc
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