python opencv otsu
时间: 2023-07-03 07:29:44 浏览: 54
Otsu's method is a popular algorithm for automatic thresholding of grayscale images. In Python OpenCV, you can use the `cv2.threshold()` function with the `cv2.THRESH_OTSU` flag to perform Otsu's thresholding.
Here's an example code snippet:
```python
import cv2
# Load the grayscale image
img = cv2.imread('image.png', 0)
# Apply Otsu's thresholding
ret, thresh = cv2.threshold(img, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_OTSU)
# Display the result
cv2.imshow('Thresholded Image', thresh)
cv2.waitKey(0)
cv2.destroyAllWindows()
```
In this code, `img` is the grayscale image you want to threshold. The `cv2.threshold()` function returns two values - the threshold value calculated by Otsu's method (`ret`), and the thresholded image (`thresh`). The `cv2.imshow()` function is used to display the thresholded image.
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