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Copy pathaL_metrics.m
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aL_metrics.m
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function [kw, E, psnrs, ssims, mses, brisques, niqes, piqes] = aL_metrics(F, y, xref, options)
% approximate non-linear Landweber
% Keep track of metrics
options.null = 0;
%lam = getoptions(options, 'lam', 1.0);
maxiter = getoptions(options, 'maxiter', 100);
p = getoptions(options, 'p', 0.0);
show_denoised = getoptions(options, 'show_denoised', 0);
kw = y;
E = [];
e = img_norm(y - F(kw));
E = [E; e];
if show_denoised == 1
kwd = denoise(kw);
psnrs = [];
curr_psnr = psnr(kwd, xref);
psnrs = [psnrs; curr_psnr];
ssims = [];
curr_ssim = ssim(kwd, xref);
ssims = [ssims; curr_ssim];
mses = [];
curr_mse = immse(kwd, xref);
mses = [mses; curr_mse];
brisques = [];
curr_brisque = brisque(kwd);
brisques = [brisques; curr_brisque];
niqes = [];
curr_niqe = niqe(kwd);
niqes = [niqes; curr_niqe];
piqes = [];
curr_piqe = piqe(kwd);
piqes = [piqes; curr_piqe];
else
psnrs = [];
curr_psnr = psnr(kw, xref);
psnrs = [psnrs; curr_psnr];
ssims = [];
curr_ssim = ssim(kw, xref);
ssims = [ssims; curr_ssim];
mses = [];
curr_mse = immse(kw, xref);
mses = [mses; curr_mse];
brisques = [];
curr_brisque = brisque(kw);
brisques = [brisques; curr_brisque];
niqes = [];
curr_niqe = niqe(kw);
niqes = [niqes; curr_niqe];
piqes = [];
curr_piqe = piqe(kw);
piqes = [piqes; curr_piqe];
end
for n=1:maxiter
hp = y-F(kw);
hp = hp(end:-1:1,end:-1:1,:);
d = (F(kw+hp)-F(kw-hp))/2;
d = d(end:-1:1,end:-1:1,:);
% step-size
lam = 1.0/(n)^(p);
kw = kw + lam*d;
e = img_norm(y - F(kw));
E = [E; e];
if show_denoised == 1
kwd = denoise(kw);
curr_psnr = psnr(kwd, xref);
psnrs = [psnrs; curr_psnr];
curr_ssim = ssim(kwd, xref);
ssims = [ssims; curr_ssim];
curr_mse = immse(kwd, xref);
mses = [mses; curr_mse];
curr_brisque = brisque(kwd);
brisques = [brisques; curr_brisque];
curr_niqe = niqe(kwd);
niqes = [niqes; curr_niqe];
curr_piqe = piqe(kwd);
piqes = [piqes; curr_piqe];
else
curr_psnr = psnr(kw, xref);
psnrs = [psnrs; curr_psnr];
curr_ssim = ssim(kw, xref);
ssims = [ssims; curr_ssim];
curr_mse = immse(kw, xref);
mses = [mses; curr_mse];
curr_brisque = brisque(kw);
brisques = [brisques; curr_brisque];
curr_niqe = niqe(kw);
niqes = [niqes; curr_niqe];
curr_piqe = piqe(kw);
piqes = [piqes; curr_piqe];
end
end
end