Otsu阈值分割代码
时间: 2024-04-14 20:23:30 浏览: 141
Otsu阈值分割是一种常用的图像分割方法,用于将图像分成背景和前景两部分。下面是一个简单的Otsu阈值分割的代码示例:
```python
import cv2
# 读取图像
image = cv2.imread('image.jpg', 0)
# 计算图像的直方图
histogram = cv2.calcHist([image], [0], None, [256], [0, 256])
# 归一化直方图
histogram /= histogram.sum()
# 初始化类间方差和最佳阈值
inter_class_variance = 0
best_threshold = 0
# 遍历所有可能的阈值
for threshold in range(256):
# 计算背景和前景的像素概率和均值
background_probability = histogram[:threshold].sum()
foreground_probability = histogram[threshold:].sum()
background_mean = (histogram[:threshold] * range(threshold)).sum() / background_probability
foreground_mean = (histogram[threshold:] * range(threshold, 256)).sum() / foreground_probability
# 计算类间方差
current_inter_class_variance = background_probability * foreground_probability * (background_mean - foreground_mean) ** 2
# 更新最佳阈值和类间方差
if current_inter_class_variance > inter_class_variance:
inter_class_variance = current_inter_class_variance
best_threshold = threshold
# 应用最佳阈值进行二值化
binary_image = (image > best_threshold).astype('uint8') * 255
# 显示结果
cv2.imshow('Original Image', image)
cv2.imshow('Binary Image', binary_image)
cv2.waitKey(0)
cv2.destroyAllWindows()
```
这段代码使用OpenCV库实现了Otsu阈值分割。首先,读取图像并计算图像的直方图。然后,遍历所有可能的阈值,计算背景和前景的像素概率和均值,并根据类间方差更新最佳阈值。最后,应用最佳阈值进行二值化,并显示结果。
阅读全文
相关推荐
![-](https://img-home.csdnimg.cn/images/20241231045053.png)
![-](https://img-home.csdnimg.cn/images/20241231045053.png)
![-](https://img-home.csdnimg.cn/images/20241231044955.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![zip](https://img-home.csdnimg.cn/images/20241231045053.png)
![zip](https://img-home.csdnimg.cn/images/20241231045053.png)
![zip](https://img-home.csdnimg.cn/images/20241231045053.png)
![rar](https://img-home.csdnimg.cn/images/20241231044955.png)
![zip](https://img-home.csdnimg.cn/images/20241231045053.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)