MATLAB用canny求得图像轮廓eg=edge(I,'canny',0.35),[x, y] = find(eg);之后,轮廓为左右对称的,根据x,y将轮廓分为左右两边,分布求左右两边曲率变化最大处
时间: 2024-04-06 19:34:07 浏览: 55
要分别求图像轮廓左右两边的曲率变化最大处,可以使用以下代码:
```matlab
% 读取图像
img = imread('example.png');
% 边缘检测
img_edge = edge(img, 'canny', 0.35);
% 获取轮廓点的坐标
[y, x] = find(img_edge);
boundary = [x, y];
% 找到图像中心行的位置
center_row = round(size(img, 1)/2);
% 将轮廓分为左右两边
left_boundary = boundary(boundary(:,1)<=center_row, :);
right_boundary = boundary(boundary(:,1)>center_row, :);
% 计算左边轮廓的曲率
left_k = curvature(left_boundary(:,2), left_boundary(:,1));
% 计算右边轮廓的曲率
right_k = curvature(right_boundary(:,2), right_boundary(:,1));
% 计算左边轮廓的曲率变化
left_k_diff = diff(left_k);
% 计算右边轮廓的曲率变化
right_k_diff = diff(right_k);
% 找到左边曲率变化最大处
[~, left_max_idx] = max(abs(left_k_diff));
left_max_point = left_boundary(left_max_idx, :);
% 找到右边曲率变化最大处
[~, right_max_idx] = max(abs(right_k_diff));
right_max_point = right_boundary(right_max_idx, :);
```
这段代码假设你已经读取了一张图像,并使用 Canny 边缘检测方法得到了图像轮廓。然后它获取了轮廓点的坐标,并找到了图像中心行的位置。接着,它将轮廓分为左右两边,并分别计算了左边和右边的曲率。最后,它找到了左右两边曲率变化最大处,并输出了对应的点坐标。
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