python 图像去雾
时间: 2023-10-22 07:07:26 浏览: 63
可以使用OpenCV库和图像去雾算法来实现Python图像去雾。以下是一种常见的去雾算法的实现方法:
1. 导入所需的库:
```python
import cv2
import numpy as np
```
2. 加载图像并将其转换为灰度图像:
```python
image = cv2.imread('input_image.jpg')
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
```
3. 计算图像的梯度:
```python
gradient = cv2.Sobel(gray, cv2.CV_64F, 0, 1, ksize=3)
```
4. 根据梯度计算大气光估计:
```python
atmospheric_light = np.percentile(gradient, 90)
```
5. 估计传递函数:
```python
transmission = 1 - 0.95 * (gradient / atmospheric_light)
transmission = np.clip(transmission, 0.1, 1)
```
6. 使用导向滤波器平滑传递函数:
```python
guide = cv2.ximgproc.createGuidedFilter(gray, 8, 0.1)
transmission_filtered = guide.filter(transmission.astype(np.float32), gray)
```
7. 恢复无雾图像:
```python
recovered = np.zeros_like(image)
for i in range(3):
recovered[:, :, i] = (image[:, :, i] - atmospheric_light) / transmission_filtered + atmospheric_light
recovered = np.clip(recovered, 0, 255).astype(np.uint8)
```
8. 保存结果图像:
```python
cv2.imwrite('output_image.jpg', recovered)
```
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