Description: denoise
In BayesShrink[5] we determine the threshold for
each subband assuming a Generalized Gaussian
Distribution(GGD) . The GGD is given by
GG¾ X ¯ (x) = C(¾ X ¯ )exp¡ [® (¾ X ¯ )jxj]¯ (6)
¡ 1 < x < 1 ¯ > 0, where
® (¾ X ¯ ) = ¾ ¡ 1
X [ ¡ (3=¯ )
¡ (1=¯ ) ]1=2
and
C(¾ X ¯ ) = ¯ ¢ ® (¾ X ¯ )
2¡ ( 1
¯ )
and ¡ (t) =
R1
0 e¡ uut¡ 1du.
The parameter ¾ X is the standard deviation and ¯
is the shape parameter It has been observed[5] that
with a shape parameter ¯ ranging from 0.5 to 1, we
can describe the the distribution of coefficients in a
subband for a large set of natural images.Assuming
such a distribution for the wavelet coefficients, we empirically
estimate ¯ and ¾ X for each subband and try
to find the threshold T which minimizes the Bayesian
Risk, i.e, the expected value of the mean square error.
To Search:
File list (Check if you may need any files):
VistaRestoreTools1.0
....................\degradation
....................\...........\apply_degradation.m
....................\...........\apply_degradation_2.m
....................\...........\degrada2.m
....................\...........\degrade.m
....................\imagenes
....................\........\070809-1805.f.jpg
....................\........\070809-1805ni.f.jpg
....................\........\barbara.png
....................\........\barbara256.mat
....................\........\barbara512.mat
....................\........\barco.jpg
....................\........\boat.png
....................\........\boats.png
....................\........\boats256.mat
....................\........\cameraman.bmp
....................\........\cameraman.mat
....................\........\cameraman.png
....................\........\cameraman256.mat
....................\........\DSC01031.png
....................\........\einstein.bmp
....................\........\einstein.png
....................\........\einstein256.mat
....................\........\fingerprint.png
....................\........\flinstones.png
....................\........\fruta256.mat
....................\........\goldhill256.bmp
....................\........\goldhill256.mat
....................\........\goldhill256.png
....................\........\hojas.png
....................\........\hojas256.mat
....................\........\house.png
....................\........\lena.png
....................\........\lena256.mat
....................\........\lena512.mat
....................\........\mandril256.mat
....................\........\mandrill.png
....................\........\mazinger.jpg
....................\........\natural.mat
....................\........\peppers256.mat
....................\........\peppers256.png
....................\........\piedras256.mat
....................\........\sintetica.bmp
....................\........\sintetica.png
....................\........\Thumbs.db
....................\........\WS_FTP.LOG
....................\image_degradation_demo.m
....................\image_denoising_demo.m
....................\image_restoration_demo.m
....................\local_fourier_restoration
....................\.........................\demo_denoising.m
....................\.........................\demo_denoising_one_lambda.m
....................\.........................\demo_restoration.m
....................\.........................\doc
....................\.........................\...\alpha.png
....................\.........................\...\c++.png
....................\.........................\...\c.png
....................\.........................\...\demoicon.gif
....................\.........................\...\down.png
....................\.........................\...\fortran.png
....................\.........................\...\hp.png
....................\.........................\...\index.html
....................\.........................\...\left.png
....................\.........................\...\linux.png
....................\.........................\...\m2html.css
....................\.........................\...\matlabicon.gif
....................\.........................\...\mex.png
....................\.........................\...\PR
....................\.........................\...\..\ajusta_bloque_ar12.html
....................\.........................\...\..\ajusta_bloque_ar4.html
....................\.........................\...\..\ajusta_bloque_ar8.html
....................\.........................\...\..\ampliaconborde.html
....................\.........................\...\..\ancho1_interaccion.html
....................\.........................\...\..\constantes_sin_continua.html
....................\.........................\...\..\costeinvrespfour.html
....................\.........................\...\..\degrada2.html
....................\.........................\...\..\dezigzag.html
....................\.........................\...\..\do_overlap.html
....................\.....................
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