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| author | mensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f> | 2008-11-14 15:39:19 +0000 |
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| committer | mensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f> | 2008-11-14 15:39:19 +0000 |
| commit | 1c5685d68f1b73270fb814fe04cbb490eb90ba5f (patch) | |
| tree | 3d3ada08a934b96fc31531f1327690d7edc6f766 /includes/js/dojox/encoding/tests/compression/vq.html | |
| parent | 104d59099e048688c4dbac37d72137006e396558 (diff) | |
| download | semanticscuttle-1c5685d68f1b73270fb814fe04cbb490eb90ba5f.tar.gz semanticscuttle-1c5685d68f1b73270fb814fe04cbb490eb90ba5f.tar.bz2 | |
Minor fix: Remove DOJO library (60Mo) replaced by link to Google CDN (online DOJO library)
git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@159 b3834d28-1941-0410-a4f8-b48e95affb8f
Diffstat (limited to 'includes/js/dojox/encoding/tests/compression/vq.html')
| -rw-r--r-- | includes/js/dojox/encoding/tests/compression/vq.html | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/includes/js/dojox/encoding/tests/compression/vq.html b/includes/js/dojox/encoding/tests/compression/vq.html deleted file mode 100644 index 7805bd4..0000000 --- a/includes/js/dojox/encoding/tests/compression/vq.html +++ /dev/null @@ -1,185 +0,0 @@ -<html> - <head> - <title>Compress colors using VQ</title> - <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> - <style type="text/css"> - @import "../../../../dojo/resources/dojo.css"; - @import "../../../../dijit/tests/css/dijitTests.css"; - - .pane { margin-top: 2em; } - </style> - <script type="text/javascript" src="../../../../dojo/dojo.js" djConfig="isDebug: true"></script> - <script type="text/javascript"> - dojo.require("dojox.encoding.tests.compression.colors"); - dojo.require("dojox.encoding.compression.splay"); - dojo.require("dojox.encoding.bits"); - - var colors = dojox.encoding.tests.compression.colors; - - var dist = function(a, b){ - var r = a[0] - b[0], g = a[1] - b[1], b = a[2] - b[2]; - return r * r + g * g + b * b; - }; - - var hexcolor = function(c){ - return "#" + (c[0] < 16 ? "0" : "") + c[0].toString(16) + - (c[1] < 16 ? "0" : "") + c[1].toString(16) + - (c[2] < 16 ? "0" : "") + c[2].toString(16); - }; - - var maxdist = function(a, b, maxdist){ - var r = Math.abs(a[0] - b[0]), g = Math.abs(a[1] - b[1]), b = Math.abs(a[2] - b[2]); - ++maxdist[bits(r)]; - ++maxdist[bits(g)]; - ++maxdist[bits(b)]; - }; - - var encodeColor = function(a, b, splay, stream){ - var r = a[0] - b[0], g = a[1] - b[1], b = a[2] - b[2]; - stream.putBits(r < 0 ? 1 : 0, 1); - splay.encode(Math.abs(r), stream); - stream.putBits(g < 0 ? 1 : 0, 1); - splay.encode(Math.abs(g), stream); - stream.putBits(b < 0 ? 1 : 0, 1); - splay.encode(Math.abs(b), stream); - }; - - var bits = function(x){ - var w = 1; - for(var v = 2; x >= v; v <<= 1, ++w); - return w; - }; - - var runVQ = function(n){ - dojo.byId("status").innerHTML = "<em>Initializing...</em>"; - dojo.byId("report").innerHTML = "<em>Running VQ...</em>"; - var clusters = []; - // select initial cluster centers - var empty = {}; - for(var i in colors){ - if(i in empty){ continue; } - clusters.push({center: colors[i]}); - if(clusters.length == n){ break; } - } - /* - for(var i = 0; i < n; ++i){ - var r = Math.floor(Math.random() * 256), g = Math.floor(Math.random() * 256), b = Math.floor(Math.random() * 256); - clusters.push({center: [r, g, b]}); - } - */ - // do runs - dojo.byId("status").innerHTML = "<div>Starting runs...</div>"; - var jitter = 0, niter = 1; - do { - // save previous centers - var old_clusters = []; - dojo.forEach(clusters, function(c){ old_clusters.push({center: c.center}); c.members = []; }); - // assign colors to clusters - for(var i in colors){ - if(i in empty){ continue; } - var c = colors[i], k = -1, kd = Number.MAX_VALUE; - for(var j = 0; j < clusters.length; ++j){ - var jd = dist(clusters[j].center, c); - if(jd < kd){ k = j, kd = jd; } - } - clusters[k].members.push(i); - } - // recalculate cluster centers - for(var i = 0; i < clusters.length; ++i){ - if(!clusters[i].members.length){ continue; } - var r = 0, g = 0, b = 0; - dojo.forEach(clusters[i].members, function(name){ - var c = colors[name]; - r += c[0]; - g += c[1]; - b += c[2]; - }); - r = Math.round(r / clusters[i].members.length); - g = Math.round(g / clusters[i].members.length); - b = Math.round(b / clusters[i].members.length); - clusters[i].center = [r, g, b]; - } - // calculate the jitter - jitter = 0; - for(var i = 0; i < clusters.length; ++i){ - jitter = Math.max(jitter, dist(clusters[i].center, old_clusters[i].center)); - } - var node = dojo.doc.createElement("div"); - node.innerHTML = "Run #" + niter + ", jitter = " + jitter; - dojo.byId("status").appendChild(node); - ++niter; - }while(jitter > 1 && niter < 1000); - // calculate the required number of bytes - var output = new dojox.encoding.bits.OutputStream(), - splay = new dojox.encoding.compression.Splay(256); - for(var i = 0; i < clusters.length; ++i){ - var c = clusters[i], m = c.members, d = 0, ol = output.getWidth(); - output.putBits(c.center[0], 8); - output.putBits(c.center[1], 8); - output.putBits(c.center[2], 8); - splay.reset(); - c.maxdist = [0, 0, 0, 0, 0, 0, 0, 0, 0]; - for(var j = 0; j < m.length; ++j){ - var color = colors[m[j]]; - maxdist(c.center, color, c.maxdist); - encodeColor(c.center, color, splay, output); - } - c.bits = output.getWidth() - ol; - } - var node = dojo.doc.createElement("div"); - node.innerHTML = "Required " + Math.ceil(output.getWidth() / 8) + " bytes"; - dojo.byId("status").appendChild(node); - // generate color tables - var reps = []; - for(var i = 0; i < clusters.length; ++i){ - var c = clusters[i], m = c.members; - reps.push("<p>Cluster #" + i + " contains " + m.length + " members. Length histogram:"); - for(var j = 0; j < c.maxdist.length; ++j){ - if(c.maxdist[j]){ - reps.push(" " + j + "—" + c.maxdist[j]); - } - } - reps.push(". It requires " + c.bits + " bits (" + Math.ceil(c.bits / 8) + " bytes) to be encoded.</p>"); - reps.push("<table>"); - var wd = dist([255,255,255], c.center), bd = dist([0,0,0], c.center); - reps.push("<tr><td style='background: " + hexcolor(c.center) + "; color: " + - (wd < bd ? "black" : "white") + "'><strong>CENTER</strong></td><td>" + - c.center[0] + "</td><td>" + c.center[1] + "</td><td>" + c.center[2] + "</td></tr>"); - for(var j = 0; j < m.length; ++j){ - var color = colors[m[j]]; - wd = dist([255,255,255], color); - bd = dist([0,0,0], color); - reps.push("<tr><td style='background: " + m[j] + "; color: " + - (wd < bd ? "black" : "white") + "'><strong>" + m[j] + "</strong></td><td>" + - color[0] + "</td><td>" + color[1] + "</td><td>" + color[2] + "</td></tr>"); - } - reps.push("</table>"); - } - dojo.byId("report").innerHTML = reps.join("\n"); - }; - - run = function(){ - var n = parseInt(dojo.byId("ncluster").value); - runVQ(n); - }; - - dojo.addOnLoad(function(){ - dojo.connect(dojo.byId("run"), "onclick", run); - }); - </script> - </head> - <body> - <h1>Compress colors using VQ</h1> - <p>Select desirable number of clusters: <select id="ncluster"> - <option value="1">1</option> - <option value="2">2</option> - <option value="4">4</option> - <option value="8">8</option> - <option value="16">16</option> - <option value="32">32</option> - <option value="64">64</option> - </select> <button id="run">Run</button></p> - <div id="status" class="pane"><em>No status yet.</em></div> - <div id="report" class="pane"><em>No results yet.</em></div> - </body> -</html> |