霍夫圆检测matlab代码
时间: 2023-10-04 13:06:15 浏览: 108
以下是一个基于霍夫变换的霍夫圆检测的Matlab代码示例:
```matlab
function [circlefind = findcircle(img, minr, maxr, stepr, stepa, percent)
r = round((maxr - minr) / stepr) + 1; % 可增长的步长个数
angle = round(2 * pi / stepa); % 角度增长步长
[m, n = size(img);
houghspace = zeros(m, n, r); % 霍夫空间
[m1, n1 = find(img); % 返回二值化边缘检测图像中非零点的坐标
num = size(m1, 1); % 非零点个数
% 霍夫空间,统计相同圆点的个数
for i = 1:num
for j = 1:r
for k = 1:angle
a = round(m1(i) - (minr + (j - 1) * stepr) * cos(k * stepa));
b = round(n1(i) - (minr + (j - 1) * stepr) * sin(k * stepa));
if (a > 0 && a <= m && b > 0 && b <= n)
houghspace(a, b, j) = houghspace(a, b, j) + 1;
end
end
end
end
% 以阈值来检测圆
par = max(max(max(houghspace))); % 找出个数最多的圆的数量作为阈值
par2 = par * percent; % 阈值百分比调整
[m2, n2, r2 = size(houghspace);
circlefind = []; % 存储大于阈值的圆的圆心坐标及半径
for i = 1:m2
for j = 1:n2
for k = 1:r2
if (houghspace(i, j, k) >= par2)
a = [i, j, minr + (k - 1) * stepr];
circlefind = [circlefind; a];
end
end
end
end
end
```
上述代码实现了一个名为`findcircle`的函数,接受六个参数:`img`是二值化的边缘图像,`minr`是最小搜索的圆半径,`maxr`是最大搜索的圆半径,`stepr`是圆半径增长步长,`stepa`是角度增长步长,`percent`是阈值百分比。函数返回一个名为`circlefind`的数组,其中存储了大于阈值的圆的圆心坐标以及半径。
请注意,这只是一个示例代码,具体使用时需要根据实际需求进行适当修改。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [matlab 霍夫圆检测程序源码.zip](https://download.csdn.net/download/ksthen/79245903)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [Matlab findcircle函数实现 霍夫变换——检测圆](https://blog.csdn.net/weixin_36913190/article/details/80504293)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]
阅读全文