CLEAN算法matlab代码
时间: 2023-08-01 13:06:18 浏览: 63
以下是CLEAN算法的MATLAB代码示例:
```matlab
function [clean_image] = clean(im, psf, gain, thresh, stop_iter)
%CLEAN Deconvolve an image using the CLEAN algorithm.
% [clean_image] = clean(im, psf, gain, thresh, stop_iter) deconvolves the
% image im with the point spread function psf using the CLEAN algorithm.
% gain is the loop gain parameter, thresh is the threshold for stopping
% iterations, and stop_iter is the maximum number of iterations allowed.
% Initialize variables
residual = im;
model = zeros(size(im));
max_iter = stop_iter;
% Loop until stopping criterion is met or max iterations reached
for i=1:max_iter
% Find the peak value in the residual
[mx, idx] = max(abs(residual(:)));
[y, x] = ind2sub(size(im), idx);
if mx < thresh
break;
end
% Subtract the scaled PSF from the residual
model(y, x) = model(y, x) + gain*mx;
psf_shift = circshift(psf, [y-floor(size(psf,1)/2)-1 ...
x-floor(size(psf,2)/2)-1]);
residual(y-floor(size(psf,1)/2):y+floor(size(psf,1)/2), ...
x-floor(size(psf,2)/2):x+floor(size(psf,2)/2)) = ...
residual(y-floor(size(psf,1)/2):y+floor(size(psf,1)/2), ...
x-floor(size(psf,2)/2):x+floor(size(psf,2)/2)) - ...
gain*mx*psf_shift;
end
clean_image = model;
end
```
此代码实现了CLEAN算法的基本逻辑,输入参数包括待去卷积的图像、点扩散函数、循环增益、停止阈值和最大迭代次数。在每一次迭代中,算法找到残差中的峰值,并用一个缩放后的点扩散函数从残差中减去该峰值。如果残差的最大值小于阈值,则算法停止。最终返回的是CLEAN后的图像。
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