Matlab实现基于Hough变换的直线检测算法
时间: 2024-06-08 08:11:22 浏览: 112
Hough 变换是一种常用的图像处理算法,用于检测图像中的直线。以下是使用 MATLAB 实现基于 Hough 变换的直线检测算法的步骤:
1. 读取图像并转换为灰度图像。
```matlab
img = imread('image.jpg');
img_gray = rgb2gray(img);
```
2. 对图像进行 Canny 边缘检测。
```matlab
edges = edge(img_gray, 'canny');
```
3. 使用 Hough 变换检测直线。
```matlab
[H,theta,rho] = hough(edges);
peaks = houghpeaks(H, 100);
lines = houghlines(edges,theta,rho,peaks);
```
4. 在图像上画出检测到的直线。
```matlab
figure, imshow(img), hold on
for k = 1:length(lines)
xy = [lines(k).point1; lines(k).point2];
plot(xy(:,1),xy(:,2),'LineWidth',2,'Color','green');
end
```
完整代码如下:
```matlab
img = imread('image.jpg');
img_gray = rgb2gray(img);
edges = edge(img_gray, 'canny');
[H,theta,rho] = hough(edges);
peaks = houghpeaks(H, 100);
lines = houghlines(edges,theta,rho,peaks);
figure, imshow(img), hold on
for k = 1:length(lines)
xy = [lines(k).point1; lines(k).point2];
plot(xy(:,1),xy(:,2),'LineWidth',2,'Color','green');
end
```
运行代码后,会在图像上显示检测到的直线。
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