MATLAB harris响应函数代码

MATLAB中实现Harris响应函数的代码如下：

function corners = harrisCornerDetection(image, threshold)

% 计算图像的梯度
[Ix, Iy] = gradient(double(image));

% 计算H矩阵的三个分量
Ix2 = Ix .* Ix;
Iy2 = Iy .* Iy;
Ixy = Ix .* Iy;

% 对H矩阵进行高斯模糊
sigma = 2;
g = fspecial('gaussian',3 * sigma, sigma);
Ix2_smoothed = imfilter(Ix2, g, 'replicate');
Iy2_smoothed = imfilter(Iy2, g, 'replicate');
Ixy_smoothed = imfilter(Ixy, g, 'replicate');

% 计算H矩阵的每个像素的响应函数值
k = 0.04;
R = (Ix2_smoothed .* Iy2_smoothed - Ixy_smoothed.^2) - k * (Ix2_smoothed + Iy2_smoothed).^2;

% 使用阈值筛选出角点
corners = R > threshold;

end