圆形LBP特征-matlab
时间: 2023-10-15 12:04:37 浏览: 136
圆形LBP特征是一种用于图像纹理分析的特征提取方法。下面是利用MATLAB实现圆形LBP特征的示例代码:
```matlab
function [histogram] = circular_lbp(image, radius, neighbors)
% image: 输入图像
% radius: 圆形LBP算子的半径
% neighbors: 圆形LBP算子的邻域点数(一般为8)
% histogram: 返回的直方图
[m, n] = size(image);
histogram = zeros(1, 2^(neighbors));
for i = radius+1:m-radius
for j = radius+1:n-radius
center_pixel = image(i, j);
binary_code = 0;
for k = 1:neighbors
x = i + radius*cos(2*pi*(k-1)/neighbors);
y = j - radius*sin(2*pi*(k-1)/neighbors);
if image(round(x), round(y)) >= center_pixel
binary_code = binary_code + 2^(k-1);
end
end
histogram(binary_code+1) = histogram(binary_code+1) + 1;
end
end
histogram = histogram / sum(histogram);
end
```
使用方法:
```matlab
image = imread('lena.bmp');
gray_image = rgb2gray(image);
histogram = circular_lbp(gray_image, 1, 8);
bar(histogram);
```
其中,第一个参数是输入图像,第二个参数是圆形LBP算子的半径,第三个参数是圆形LBP算子的邻域点数。函数返回一个直方图,表示图像的纹理特征。
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