MATLAB计算两幅图片的互信息
时间: 2024-05-14 14:14:07 浏览: 15
可以使用MATLAB中的'imhist'函数和'entropy'函数来计算两幅图像的互信息。
步骤如下:
1. 读入两幅图像
```
img1 = imread('image1.jpg');
img2 = imread('image2.jpg');
```
2. 计算每幅图像的直方图
```
hist1 = imhist(img1);
hist2 = imhist(img2);
```
3. 计算每幅图像的熵
```
H1 = entropy(img1);
H2 = entropy(img2);
```
4. 计算两幅图像的联合直方图
```
jointHist = histcounts2(img1(:), img2(:));
```
5. 计算联合熵
```
H12 = entropy(jointHist);
```
6. 计算互信息
```
MI = H1 + H2 - H12;
```
完整代码:
```
img1 = imread('image1.jpg');
img2 = imread('image2.jpg');
hist1 = imhist(img1);
hist2 = imhist(img2);
H1 = entropy(img1);
H2 = entropy(img2);
jointHist = histcounts2(img1(:), img2(:));
H12 = entropy(jointHist);
MI = H1 + H2 - H12;
```
其中,'image1.jpg'和'image2.jpg'是需要计算互信息的两幅图像的文件名。