matlab实现Hough变换
时间: 2023-11-06 09:59:17 浏览: 114
以下是一个简单的例子,使用MATLAB实现Hough变换,检测直线。
1. 读取图像并转换为灰度图像
```matlab
I = imread('test.jpg'); %读取图像
Igray = rgb2gray(I); %转换为灰度图像
```
2. 边缘检测
```matlab
Iedge = edge(Igray, 'canny'); %使用Canny算子进行边缘检测
```
3. Hough变换
```matlab
[H, theta, rho] = hough(Iedge); %进行Hough变换
```
4. 寻找直线
```matlab
peaks = houghpeaks(H, 5); %找到峰值
lines = houghlines(Iedge, theta, rho, peaks); %使用峰值和变换参数寻找直线
```
5. 显示结果
```matlab
figure, imshow(I), hold on %在原图像上显示结果
for k = 1:length(lines)
xy = [lines(k).point1; lines(k).point2];
plot(xy(:,1),xy(:,2),'LineWidth',2,'Color','green');
end
```
完整代码:
```matlab
I = imread('test.jpg'); %读取图像
Igray = rgb2gray(I); %转换为灰度图像
Iedge = edge(Igray, 'canny'); %使用Canny算子进行边缘检测
[H, theta, rho] = hough(Iedge); %进行Hough变换
peaks = houghpeaks(H, 5); %找到峰值
lines = houghlines(Iedge, theta, rho, peaks); %使用峰值和变换参数寻找直线
figure, imshow(I), hold on %在原图像上显示结果
for k = 1:length(lines)
xy = [lines(k).point1; lines(k).point2];
plot(xy(:,1),xy(:,2),'LineWidth',2,'Color','green');
end
```
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