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            <a href="http://www.mathworks.com/matlabcentral/">MATLAB Central</a> &gt;&nbsp;
            <a href="http://www.mathworks.com/matlabcentral/fileexchange/loadCategory.do">File Exchange</a> &gt; <a href="http://www.mathworks.com/matlabcentral/fileexchange/loadCategory.do?objectId=26&amp;objectType=Category">Image Processing</a> &gt; <a href="http://www.mathworks.com/matlabcentral/fileexchange/loadCategory.do?objectId=129&amp;objectType=Category">Compression</a> &gt; IMAGE COMPRESSION &amp; RECONSTRUCTION OF IMAGES 
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<tbody><tr><td class="headercell" height="20" width="70%">&nbsp;IMAGE COMPRESSION &amp; RECONSTRUCTION OF IMAGES&nbsp;
</td><td class="headercell" align="right" width="30%">&nbsp;</td></tr>
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                 <img src="loadFile.do_files/fullstar.gif" alt="" height="12" hspace="1" width="12"><img src="loadFile.do_files/fullstar.gif" alt="" height="12" hspace="1" width="12"><img src="loadFile.do_files/fullstar.gif" alt="" height="12" hspace="1" width="12"><img src="loadFile.do_files/fullstar.gif" alt="" height="12" hspace="1" width="12"><img src="loadFile.do_files/fullstar_grey.gif" alt="" height="12" hspace="1" width="12">
                

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                             	10 reviews</a>
                             
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                          <td><img src="loadFile.do_files/30th.png" title="Complexity (35th percentile, raw score: 12)" border="0" height="10" width="11"></td>
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                        <a href="http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=12581&amp;objectType=scoreDetails" class="small">Full report</a>&nbsp;&nbsp;
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            <td valign="top" width="10">&nbsp;</td>
            <td valign="top" width="89"><b>Author:</b></td>
            <td colspan="2"><a href="http://www.mathworks.com/matlabcentral/fileexchange/loadAuthor.do?objectType=author&amp;objectId=1095253">BABY&nbsp;VIJILIN</a></td>
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            <td height="15" valign="top" width="10">&nbsp;</td>
            <td height="15" valign="top" width="89"><b>Summary:</b></td>
            <td colspan="2" height="15">PROGRAM DECOMPOSE IMAGE,COMPRESS IT, RECONSTRUCTION IS PERFORMED.</td>
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            <td height="15" valign="top" width="10">&nbsp;</td>
            <td height="15" valign="top" width="125"><b>MATLAB Release:</b></td>
            <td colspan="2" height="15" valign="bottom">R14SP3</td>
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            <td height="15" valign="top" width="10">&nbsp;</td>
            <td height="15" valign="top" width="125"><b>Required Products:</b></td>
            
            <td colspan="2" height="15">Image Processing Toolbox,Wavelet Toolbox</td>
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            <td valign="top" width="135"><b>Description:</b></td>
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This program compress and recostruct using wavelets. We can select
level of decomposition(here maximum 4 levels are given) of images using
selected wavelet.<br>
For eg:-wavelets can be haar, db1, db2,dmey...............<br>
Decomposition can be viewed in figure.<br>
(Please note that select 256X256 image for better result.)<br>
Then compression can performed, <br>
PERFL2 give compression score.<br>
Then reconstruction can be performed.<br>
Each decompsition we can choose different threshold values.<br>
For each threshold value we can calculate mse,psnr,pq(picture quality),<br>
bit ratio etc. To get pq install pqs function .  <br>
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     <input name="fileId" value="12581" type="hidden">
     <input name="fileName" value="vi2" type="hidden">
     <input name="fileExt" value=".zip" type="hidden">
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              <td width="286"> <b class="feh4blk"> File Details</b></td>
              <td width="228">&nbsp;</td>
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              <td colspan="2"><img src="loadFile.do_files/blue_band_536x5.gif" alt="" height="5" width="536"></td>
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            <td valign="top" width="1%">&nbsp;</td>
            <td valign="top" width="25%"><b>File Id:</b></td>
            <td width="20%">12581</td>
            <td valign="top" width="25%"><b>Average rating:</b></td>
            <td width="29%">4.17</td>
          </tr>
          <tr bgcolor="#f4f4f4">
            <td valign="top">&nbsp;</td>
            <td valign="top"><b>Size:</b></td>
            <td>3 KB</td>
            <td valign="top"><b># of reviews:</b></td>
            <td>10</td>
          </tr>

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            <td valign="top">&nbsp;</td>
            <td valign="top"><b>Submitted:</b></td>
            <td>2006-10-10</td>
            <td valign="top"><b>Downloads:</b></td>
            <td>4168</td>
          </tr>

          <tr bgcolor="#f4f4f4">
            <td valign="top">&nbsp;</td>
            <td valign="top"><b>Subscribers:</b></td>
            <td>1</td>
            <td colspan="2">&nbsp;</td>
          </tr>

          <tr bgcolor="#f4f4f4">
            <td>&nbsp;</td>
            <td valign="top"><b>Keywords:</b></td>
            <td colspan="3" valign="top">DECOMPOSITION,COMPRESSION,RECONSTRUCTION,DIFFERENT THRESHOLDS,QUALITY</td>
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          <tr bgcolor="#f4f4f4">
              <td>&nbsp;</td>
              <td valign="top"><b>Other Requirements:</b></td>
              <td colspan="3" valign="top">pqs function</td>
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             <td valign="top" width="10">&nbsp;</td>
             <td colspan="4" valign="top">&nbsp;</td>
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             <tr bgcolor="#f4f4f4">
                <td>&nbsp;</td>
                <td valign="top"><b>Zip file contents:</b></td>
                <td colspan="3" valign="top">pqs.m,  vi2.m</td>
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    <br>
    <!--Acknowledgements -->
    
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                <td width="286"> <b class="feh4blk"> Acknowledgements</b></td>
                <td width="228">&nbsp;</td>
              </tr>
              <tr>
                <td colspan="2"><img src="loadFile.do_files/blue_band_536x5.gif" alt="" height="5" width="536"></td>
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          <tr bgcolor="#f4f4f4">
          <td colspan="2">The author wishes to acknowledge the following in the creation of this submission: </td>
          </tr>
          <tr bgcolor="#f4f4f4">
            <td colspan="2">
              
                    <a href="http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=8755&amp;objectType=FILE">Wavelet Based Image Compression implementation using SOFM</a><br>
              
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     <!--Acknowledgements -->

      









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