jpeg2im.m ( File view )

  • By yueqiaohuayuan 2014-11-17
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			function x = jpeg2im(y) 
%JPEG2IM Decodes an IM2JPEG compressed image.
%   X = JPEG2IM(Y) decodes compressed image Y, generating
%   reconstructed approximation X.  Y is a structure generated by
%   IM2JPEG. 
%
%   See also IM2JPEG.

%   Copyright 2002-2004 R. C. Gonzalez, R. E. Woods, & S. L. Eddins
%   Digital Image Processing Using MATLAB, Prentice-Hall, 2004
%   $Revision: 1.4 $  $Date: 2003/10/26 18:39:08 $

error(nargchk(1, 1, nargin));             % Check input arguments

m = [16 11  10  16  24  40  51  61        % JPEG normalizing array
     12  12  14  19  26  58  60  55       % and zig-zag reordering
     14  13  16  24  40  57  69  56       % pattern.
     14  17  22  29  51  87  80  62
     18  22  37  56  68  109 103 77
     24  35  55  64  81  104 113 92
     49  64  78  87  103 121 120 101
     72  92  95  98  112 100 103 99];

order = [1 9  2  3  10 17 25 18 11 4  5  12 19 26 33  ...
        41 34 27 20 13 6  7  14 21 28 35 42 49 57 50  ...
        43 36 29 22 15 8  16 23 30 37 44 51 58 59 52  ...
        45 38 31 24 32 39 46 53 60 61 54 47 40 48 55  ...
        62 63 56 64];
rev = order;                          % Compute inverse ordering
for k = 1:length(order)
   rev(k) = find(order == k);
end

m = double(y.quality) / 100 * m;      % Get encoding quality.
xb = double(y.numblocks);             % Get x blocks.
sz = double(y.size);
xn = sz(2);                           % Get x columns.
xm = sz(1);                           % Get x rows.
x = huff2mat(y.huffman);              % Huffman decode.
eob = max(x(:));                      % Get end-of-block symbol

z = zeros
...
...
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01.97 kB
0_Read_Me_First.txt5.00 kB2012-02-29|09:51
Contents.m5.98 kB2012-02-29|09:51
Readme.m5.30 kB2012-02-29|09:51
adpmedian.m1.54 kB2012-02-29|09:51
average.m651.00 B2012-02-29|09:51
bayesgauss.m2.96 kB2012-02-29|09:51
bound2eight.m2.99 kB2012-02-29|09:51
bound2four.m2.42 kB2012-02-29|09:51
bound2im.m2.17 kB2012-02-29|09:51
boundaries.m5.64 kB2012-02-29|09:51
bsubsamp.m3.87 kB2012-02-29|09:51
changeclass.m592.00 B2012-02-29|09:51
colorgrad.m2.30 kB2012-02-29|09:51
colorseg.m2.37 kB2012-02-29|09:51
compare.m1.15 kB2012-02-29|09:51
connectpoly.m1.02 kB2012-02-29|09:51
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covmatrix.m977.00 B2012-02-29|09:51
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dftfilt.m882.00 B2012-02-29|09:51
dftuv.m736.00 B2012-02-29|09:51
diameter.m6.47 kB2012-02-29|09:51
endpoints.m874.00 B2012-02-29|09:51
entropy.m1.00 kB2012-02-29|09:51
fchcode.m8.55 kB2012-02-29|09:51
frdescp.m1.42 kB2012-02-29|09:51
fwtcompare.m992.00 B2012-02-29|09:51
gmean.m447.00 B2012-02-29|09:51
gscale.m2.04 kB2012-02-29|09:51
histroi.m920.00 B2012-02-29|09:51
hough.m2.64 kB2012-02-29|09:51
houghlines.m2.82 kB2012-02-29|09:51
houghpeaks.m2.65 kB2012-02-29|09:51
houghpixels.m1.02 kB2012-02-29|09:51
hpfilter.m1.23 kB2012-02-29|09:51
hsi2rgb.m1.94 kB2012-02-29|09:51
huff2mat.m2.46 kB2012-02-29|09:51
huffman.m2.82 kB2012-02-29|09:51
ice.fig45.71 kB2012-02-29|09:51
ice.m26.30 kB2012-02-29|09:51
ice_stand_alone.m46.55 kB2012-02-29|09:51
ifrdescp.m1.38 kB2012-02-29|09:51
ifwtcompare.m1.12 kB2012-02-29|09:51
im2jpeg.m2.90 kB2012-02-29|09:51
im2jpeg2k.m3.97 kB2012-02-29|09:51
imnoise2.m4.20 kB2012-02-29|09:51
imnoise3.m2.12 kB2012-02-29|09:51
improd.m791.00 B2012-02-29|09:51
imratio.m1.30 kB2012-02-29|09:51
imstack2vectors.m1.83 kB2012-02-29|09:51
intline.m1.20 kB2012-02-29|09:51
intrans.m3.25 kB2012-02-29|09:51
invmoments.m3.24 kB2012-02-29|09:51
jpeg2im.m2.41 kB2012-02-29|09:51
jpeg2k2im.m1.90 kB2012-02-29|09:51
lpc2mat.m1.42 kB2012-02-29|09:51
lpfilter.m1.44 kB2012-02-29|09:51
mahalanobis.m1.97 kB2012-02-29|09:51
manualhist.m1.75 kB2012-02-29|09:51
mat2huff.m2.75 kB2012-02-29|09:51
mat2lpc.m1.28 kB2012-02-29|09:51
minperpoly.m7.15 kB2012-02-29|09:51
paddedsize.m1.29 kB2012-02-29|09:51
pixeldup.m950.00 B2012-02-29|09:51
polyangles.m6.14 kB2012-02-29|09:51
princomp.m2.88 kB2012-02-29|09:51
quantize.m1.33 kB2012-02-29|09:51
randvertex.m1.15 kB2012-02-29|09:51
regiongrow.m1.66 kB2012-02-29|09:51
rgb2hsi.m1.46 kB2012-02-29|09:51
rgbcube.m1.98 kB2012-02-29|09:51
signature.m4.45 kB2012-02-29|09:51
specxture.m2.57 kB2012-02-29|09:51
spfilt.m3.78 kB2012-02-29|09:51
splitmerge.m4.13 kB2012-02-29|09:51
statmoments.m1.72 kB2012-02-29|09:51
statxture.m1.55 kB2012-02-29|09:51
strsimilarity.m1.78 kB2012-02-29|09:51
subim.m713.00 B2012-02-29|09:51
twodsin.m1.04 kB2012-02-29|09:51
twomodegauss.m1.16 kB2012-02-29|09:51
unravel.dll7.00 kB2012-02-29|09:51
unravel.m967.00 B2012-02-29|09:51
unravel.mexaxp24.00 kB2012-02-29|09:51
unravel.mexglx18.97 kB2012-02-29|09:51
unravel.mexhpux12.00 kB2012-02-29|09:51
unravel.mexmac8.68 kB2012-02-29|09:51
unravel.mexrs62.71 kB2012-02-29|09:51
unravel.mexsg24.44 kB2012-02-29|09:51
unravel.mexsol8.54 kB2012-02-29|09:51
vistformfwd.m1.66 kB2012-02-29|09:51
wave2gray.m4.67 kB2012-02-29|09:51
waveback.m4.52 kB2012-02-29|09:51
wavecopy.m940.00 B2012-02-29|09:51
wavecut.m1.06 kB2012-02-29|09:51
wavefast.m4.14 kB2012-02-29|09:51
wavefilter.m4.77 kB2012-02-29|09:51
wavepaste.m1.04 kB2012-02-29|09:51
wavework.m3.45 kB2012-02-29|09:51
wavezero.m696.00 B2012-02-29|09:51
x2majoraxis.m3.59 kB2012-02-29|09:51
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jpeg2im.m (160.12 kB)

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