1 2 3 4 5 <!DOCTYPE html> 6 <html lang="en"> 7 <head> 8 <meta charset="utf-8" /> 9 <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1,shrink-to-fit=no" /> 10 <title>JP2 Encoding Options @ ImageMagick</title> 11 <meta name="application-name" content="ImageMagick" /> 12 <meta name="description" content="Use ImageMagick to create, edit, compose, or convert bitmap images. 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As an example, suppose you are interested in these options:</p> 86 87 <ul> 88 <li>code blocks are 64 samples in width and 32 samples in height</li> 89 <li>no multicomponent transform</li> 90 <li>4 resolution levels for each component</li> 91 <li>compression is lossy at 64:1</li> 92 </ul> 93 94 <p>Use this command to convert a JPEG-2000 image to the PNG image format:</p> 95 96 <pre class="highlight"><code>convert wizard.jp2 wizard.png 97 </code></pre> 98 99 <p>Let's convert a JPEG image to a lossless JPEG-2000 image:</p> 100 101 <pre class="highlight"><code>convert wizard.jpg -quality 0 wizard.jp2 102 </code></pre> 103 104 <p>Here we extract an area from the image:</p> 105 106 <pre class="highlight"><code>convert 'wizard.jp2[640x480+0+0]' wizard.png 107 </code></pre> 108 109 <p>Extract a particular tile from the image:</p> 110 111 <pre class="highlight"><code>convert 'wizard.jp2[2]' wizard.png 112 </code></pre> 113 114 <p>Specify a subsampling factor:</p> 115 116 <pre class="highlight"><code>convert wizard.png -colorspace YUV -sampling-factor 2,2 wizard.jp2 117 </code></pre> 118 119 <p>Save a tiled JPEG-2000 image:</p> 120 121 <pre class="highlight"><code>convert wizard.png 'wizard.png[512x512]' 122 </code></pre> 123 124 <p>Write a digital Cinema 4K profile compliant codestream:</p> 125 126 <pre class="highlight"><code>convert wizard.png -resize 4096x2160! -depth 12 wizard.jp2 127 </code></pre> 128 129 <p>Here is a complete list of JPEG-2000 decoding options:</p> 130 131 <div class="table-responsive"> 132 <table class="table table-sm table-striped"> 133 <tr> 134 <td>jp2:quality-layers=<var>x</var></td> 135 <td>set the maximum number of quality layers to decode.</td> 136 </tr> 137 <tr> 138 <td>jp2:reduce-factor=<var>x</var></td> 139 <td>set the number of highest resolution levels to be discarded.</td> 140 </tr> 141 </table></div> 142 143 <p>Here is a complete list of JPEG-2000 encoding options:</p> 144 145 <div class="table-responsive"> 146 <table class="table table-sm table-striped"> 147 <tr> 148 <td>jp2:number-resolutions=<var>x</var></td> 149 <td>number of resolutions to encode.</td> 150 </tr> 151 <tr> 152 <td>jp2:quality=<var>x</var>,<var>x</var>,...</td> 153 <td>set the quality layer PSNR, given in dB. The order is from left to right in ascending order. The default is a single lossless quality layer.</td> 154 </tr> 155 <tr> 156 <td>jp2:rate=<var>x</var>,<var>x</var>,...</td> 157 <td>the compression ratio values. Each value is a factor of compression, thus 20 means 20 times compressed. The order is from left to right in descending order. A final lossless quality layer is signified by the value 1. The default is a single lossless quality layer.</td> 158 </tr> 159 <tr> 160 <td>jp2:progression-order=<var>x</var></td> 161 <td>choose from LRCP, RLCP, RPCL, PCRL or CPRL.</td> 162 </tr> 163 </table></div> 164 </div> 165 </div> 166 </main><!-- /.container --> 167 <footer class="magick-footer"> 168 <p><a href="security-policy.html">Security</a> 169 <a href="architecture.html">Architecture</a> 170 <a href="links.html">Related</a> 171 <a href="sitemap.html">Sitemap</a> 172 173 <a href="jp2.html#"><img class="d-inline" id="wand" alt="And Now a Touch of Magick" width="16" height="16" src="../images/wand.ico"/></a> 174 175 <a href="http://pgp.mit.edu/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> 176 <a href="support.html">Donate</a> 177 <a href="https://imagemagick.org/script/contact.php">Contact Us</a> 178 <br/> 179 <small> 1999-2019 ImageMagick Studio LLC</small></p> 180 </footer> 181 182 <!-- Javascript assets --> 183 <script src="assets/magick.js" crossorigin="anonymous"></script> 184 <script>window.jQuery || document.write('<script src="https://localhost/ajax/libs/jquery/3.3.1/jquery.min.js"><\/script>')</script> 185 </body> 186 </html> 187 <!-- Magick Cache 5th January 2019 11:43 -->
