msrcr算法matlab代码
时间: 2023-07-28 21:07:16 浏览: 68
以下是MSRCR算法的MATLAB代码:
```matlab
function [MSRCR_result, detail] = MSRCR(input_image, scales, sigma_min, sigma_max, gain, offset, alpha, beta)
% input_image: 输入图像
% scales: 尺度数
% sigma_min: 高斯核的最小标准差
% sigma_max: 高斯核的最大标准差
% gain: 增益
% offset: 偏移
% alpha: 图像亮度调整参数
% beta: 图像对比度调整参数
% 将输入图像转换为double类型
input_image = im2double(input_image);
% 计算拉普拉斯金字塔
lap_pyramid = laplacian_pyramid(input_image, scales, sigma_min, sigma_max);
% 计算多尺度权重系数
weight_map = weight_map_calculation(lap_pyramid, alpha, beta);
% 计算多尺度恢复图像
restored_pyramid = cell(1, scales);
for i = 1:scales
restored_pyramid{i} = lap_pyramid{i} .* weight_map{i};
end
% 重构图像
MSRCR_result = reconstruct_image(restored_pyramid);
MSRCR_result = MSRCR_result.*gain + offset;
% 计算细节图像
detail = input_image - MSRCR_result;
end
function pyramid = laplacian_pyramid(input_image, scales, sigma_min, sigma_max)
% 计算高斯金字塔
gauss_pyramid = gaussian_pyramid(input_image, scales, sigma_min, sigma_max);
% 计算拉普拉斯金字塔
pyramid = cell(1, scales);
for i = 1:(scales-1)
pyramid{i} = gauss_pyramid{i} - gauss_pyramid{i+1};
end
pyramid{scales} = gauss_pyramid{scales};
end
function pyramid = gaussian_pyramid(input_image, scales, sigma_min, sigma_max)
% 计算高斯金字塔
pyramid = cell(1, scales);
pyramid{1} = input_image;
for i = 2:scales
sigma = sigma_min + (sigma_max - sigma_min) / (scales - 1) * (i - 1);
gauss_kernel = fspecial('gaussian', [round(sigma*6+1) round(sigma*6+1)], sigma);
pyramid{i} = imfilter(pyramid{i-1}, gauss_kernel, 'symmetric', 'conv');
end
end
function weight_map = weight_map_calculation(lap_pyramid, alpha, beta)
% 计算多尺度权重系数
weight_map = cell(1, length(lap_pyramid));
for i = 1:length(lap_pyramid)
weight_map{i} = abs(lap_pyramid{i}).^alpha .* sign(lap_pyramid{i}) .* (beta/(mean2(abs(lap_pyramid{i})).^alpha));
end
end
function output_image = reconstruct_image(restored_pyramid)
% 重构图像
output_image = restored_pyramid{end};
for i = (length(restored_pyramid)-1):-1:1
output_image = imresize(output_image, size(restored_pyramid{i}));
output_image = output_image + restored_pyramid{i};
end
end
```
注:
1. 代码中使用了其他函数,如高斯金字塔的计算和图像重构等,需要自行编写。
2. 代码中的参数值需要根据实际情况进行调整,以达到最佳效果。
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