1 2 3 4 5 <!DOCTYPE html> 6 <html lang="en"> 7 <head> 8 <title>ImageMagick: JP2 Encoding Options</title> 9 <meta charset="utf-8" /> 10 <meta http-equiv="X-UA-Compatible" content="IE=edge" /> 11 <meta name="viewport" content="width=device-width, initial-scale=1" /> 12 <meta http-equiv="content-type" content="text/html; charset=utf-8"/> 13 <meta name="application-name" content="ImageMagick"/> 14 <meta name="description" content="ImageMagick is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats (over 200) including PNG, JPEG, JPEG-2000, GIF, WebP, Postscript, PDF, and SVG. 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As an example, suppose you are interested in these options:</p> 61 62 <ul> 63 <li>code blocks are 64 samples in width and 32 samples in height</li> 64 <li>no multicomponent transform</li> 65 <li>4 resolution levels for each component</li> 66 <li>compression is lossy at 64:1</li> 67 </ul> 68 69 <p>Use this command to convert a JPEG-2000 image to the PNG image format:</p> 70 71 <pre> 72 convert wizard.jp2 wizard.png 73 </pre> 74 75 <p>Let's convert a JPEG image to a lossless JPEG-2000 image:</p> 76 77 <pre> 78 convert wizard.jpg -quality 0 wizard.jp2 79 </pre> 80 81 <p>Here we extract an area from the image:</p> 82 83 <pre> 84 convert 'wizard.jp2[640x480+0+0]' wizard.png 85 </pre> 86 87 <p>Extract a particular tile from the image:</p> 88 89 <pre> 90 convert 'wizard.jp2[2]' wizard.png 91 </pre> 92 93 <p>Specify a subsampling factor:</p> 94 95 <pre> 96 convert wizard.png -colorspace YUV -sampling-factor 2,2 wizard.jp2 97 </pre> 98 99 <p>Save a tiled JPEG-2000 image:</p> 100 101 <pre> 102 convert wizard.png 'wizard.png[512x512]' 103 </pre> 104 105 <p>Write a digital Cinema 4K profile compliant codestream:</p> 106 107 <pre> 108 convert wizard.png -resize 4096x2160! -depth 12 wizard.jp2 109 </pre> 110 111 <p>Here is a complete list of JPEG-2000 decoding options:</p> 112 113 <div class="table-responsive"> 114 <table class="table table-condensed table-striped"> 115 <tr> 116 <td>jp2:layer-number=<var>x</var></td> 117 <td>set the maximum number of quality layers to decode.</td> 118 </tr> 119 <tr> 120 <td>jp2:reduce-factor=<var>x</var></td> 121 <td>set the number of highest resolution levels to be discarded.</td> 122 </tr> 123 </table></div> 124 125 <p>Here is a complete list of JPEG-2000 encoding options:</p> 126 127 <div class="table-responsive"> 128 <table class="table table-condensed table-striped"> 129 <tr> 130 <dt>jp2:number-resolutions=<var>x</var></dt> 131 <dd>number of resolutions to encode.</dd> 132 </tr> 133 <tr> 134 <td>jp2:quality=<var>x</var>,<var>x</var>,...</td> 135 <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> 136 </tr> 137 <tr> 138 <td>jp2:rate=<var>x</var>,<var>x</var>,...</td> 139 <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> 140 </tr> 141 <tr> 142 <td>jp2:progression-order=<var>x</var></td> 143 <td>choose from LRCP, RLCP, RPCL, PCRL or CPRL.</td> 144 </tr> 145 </table></div> 146 </div> 147 <footer class="magick-footer"> 148 <p><a href="support.html">Donate</a> 149 <a href="sitemap.html">Sitemap</a> 150 <a href="links.html">Related</a> 151 <a href="architecture.html">Architecture</a> 152 </p> 153 <p><a href="jp2.html#">Back to top</a> 154 <a href="http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> 155 <a href="http://www.imagemagick.org/script/contact.php">Contact Us</a></p> 156 <p><small> 1999-2016 ImageMagick Studio LLC</small></p> 157 </footer> 158 </div><!-- /.container --> 159 160 <script src="https://localhost/ajax/libs/jquery/1.11.3/jquery.min.js"></script> 161 <script src="../js/magick.html"></script> 162 </div> 163 </body> 164 </html> 165
