利用python完成图像清晰度评估
时间: 2023-07-08 17:15:54 浏览: 124
要完成图像清晰度评估,可以采用以下步骤:
1. 首先,需要导入OpenCV库和NumPy库:
```python
import cv2
import numpy as np
```
2. 读取图像文件:
```python
img = cv2.imread('image.jpg')
```
3. 将图像转换为灰度图像:
```python
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
```
4. 计算Tenengrad梯度函数:
```python
ksize = 3 # 定义核的大小
dx = cv2.Sobel(gray, cv2.CV_64F, 1, 0, ksize) # 计算x方向的Sobel导数
dy = cv2.Sobel(gray, cv2.CV_64F, 0, 1, ksize) # 计算y方向的Sobel导数
tenengrad = cv2.add(cv2.absdiff(cv2.pow(dx, 2), cv2.pow(dy, 2)), 0) # 计算Tenengrad梯度函数
```
5. 计算图像清晰度评分:
```python
score = np.mean(tenengrad)
```
6. 显示图像和图像清晰度评分:
```python
cv2.imshow('Image', img)
print('Tenengrad Score:', score)
cv2.waitKey(0)
cv2.destroyAllWindows()
```
完整代码如下:
```python
import cv2
import numpy as np
img = cv2.imread('image.jpg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
ksize = 3
dx = cv2.Sobel(gray, cv2.CV_64F, 1, 0, ksize)
dy = cv2.Sobel(gray, cv2.CV_64F, 0, 1, ksize)
tenengrad = cv2.add(cv2.absdiff(cv2.pow(dx, 2), cv2.pow(dy, 2)), 0)
score = np.mean(tenengrad)
cv2.imshow('Image', img)
print('Tenengrad Score:', score)
cv2.waitKey(0)
cv2.destroyAllWindows()
```
这样就可以用Python完成图像清晰度评估了。
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