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RecentNews\nTheIntroduction\nJPEG2000Parts\nJPEG2000FileFormats\nJPEG2000Compliance\nJPEG2000Literature

[[MptwEditTemplate]]\n

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The following JPEG 2000 codecs have been tested by the authors or associated people using the Part 4 compliance test files and reported results to me: \n\n|!Codec|!Version/Date|!Compliance Level Reported|\n|Aware| |~P1C1|\n|Kakadu|3.1|~P1C1 & ~JP2|\n|~LuraWave.jp2|v1.11|~P1C1 & ~JP2|\n|Ricoh||~P1C1|\n|Thales|v1.11|~P1C1|\n|~OpenJPEG (UCL)|1.0|~P1C1 & ~JP2|\n|Color utilities|January 2004|~P1C1 & ~JP2|\n\n \nNote that these codecs are not necessarily publicly available, may be available only inside an application where it is hard or impossible to test for compliance. Further compliance may depend on running on a specific piece of hardware with some minimum amount of memory available.\n \nNote also that the "reference" JPEG 2000 codecs contained in the JPEG 2000 Part 5 standard and freely available have not yet reported ability to pass the compliance tests!\n\nThere are several more codecs listed on my [[JPEG2000 Adoption Page|jpeg2000adoption.html]], these are listed here either because they participated in the development of the complaince tests or later ran the tests themselves and reported the results to me.\n \nThe "P1" or "P0" part of the compliance level refers to the "profile" of the codestream which can be decoded by the codec. Profile 0 codestreams are not allowed to use some of the features of JPEG 2000, but still provide many of the features of JPEG 2000. Profile 1 codestreams are only slightly limited from JPEG 2000, the primary limitation is that all components must contain low resolution pieces of 128x128 or smaller.\n \nThe "C0" or "C1" part of the compliance class of the decoder. Class 0 decoders need only decode a small portion of large images, class 1 codecoders need to decode much more. While there is a class 2 defined, no test files are available.\n \nThe highest profile/class that can currently be reported is P1C1. (While Class 2 has been defined, there are no tests).\n \n\nThe "~JP2" part of the compliance level refers to the ability to decode the ~JP2 file format defined in Part 1. In particular, the decoder must be able to deal with the color space information in the file format.

<html><p><a href="http://www.iana.org/assignments/media-types/">IANA</a> has\nnow registered the JPEG 2000 media types image/jp2, image/jpx,\nimage/jpm and video/mj2.</p>\n \n<p>The original JPEG was "colorblind" meaning it compressed components\nof images but didn't tell what the color space was. Vendors quickly\nadded this information in multiple incompatible ways. Eventually JFIF\nwon out and life was good. Wanting to avoid the mistakes of the\noriginal JPEG this time several file formats were defined from the\nbeginning:</p>\n \n<p>.j2k - This extension will probably be used for a pure colorblind\ncodestream with no file wrapper. It is likely that these codestreams\nwill be wrapped by TIFF, or DICOM, other currently existing file\nformats in addition to the committee defined formats. </p>\n\n \n<p>.jp2 - This extension implies the "JP2" file format which provides\na required color space and the option to provide copyright and\nresolution information. This is defined in Part 1 of the\nstandard.</p>\n \n<p>.jpf - This file format is defined in Part 2 of the standard and provides many additional definitions beyond JP2. (The extension should have been .jpx but that was already in use. These files are still called jpx.) Some JPX files can be written as JP2 files and a JP2 reader will skip &quot;boxes&quot; it doesn't understand. Some JPX files require a JPX reader.</p>\n \n<p>.mj2 - Defined in Part 3 of the standard, used for "collections" of\nimages, often with a time base, as in Quicktime or MPEG-4.</p>\n \n<p>.jpm - Defined in Part 6 of the standard, and will allow multiple\ncompression types and layering of images.</p>\n </html>

See ObtainingStandards for the how to get the official standards. However, in many cases the standards are not the easiest way to learn, and may not contain the application usage information you may desire, in which case some of the references below may be helpful.\n\nThere is a comparison of different encoders (and Windows Media Photo) in [[MSU Windows Media Photo and JPEG 2000 Codecs Comparison|http://www.compression.ru/video/codec_comparison/wmp_codecs_comparison_en.html]]. It's very nice in that they used a lot of codecs, but their imagery is not modern and with so many codecs, it's very difficult to make sure each codec was run in the way it best operates.\n\nRobert Buckley gave a tutorial at the [[archiving conference|http://www.imaging.org/conferences/archiving2005/tutorials.cfm]] on JPEG 2000 for Cultural Heritage Institutions: Metadata, Access & Archiving, April 26th., 2005, Washington DC.\n\nThe [[www.digitalpreservation.gov|http://www.digitalpreservation.gov/formats/fdd/browse_list.shtml]] lists information about many many many file formats, including several flavors of JPEG 2000.\n\n[[JPEG 2000 Images As You Like (pdf)|jpeg2000_university_talk_200104_4up.pdf]] is a talk I have given at several universities, it has a high level introduction to many concepts.\n\nColyer, Greg and Richard Clark. //Guide to the Practical Implementation of JPEG 2000//. London: British Standards Institute, 2003. ISBN: 0580412423 BSI: PD 6777:2003. \n\nThe above guide is done by long time committee members and is excellent, a PDF is sold, but sadly [[BSI|http://www.bsi-global.com/]] has redone their webpage and I can't find the guide. You could try by searching for ~PD6777.\n \n[[David Taubman|http://maestro.ee.unsw.edu.au/%7Etaubman/]] and [[Michael Marcellin|http://vail.ece.arizona.edu/%7Emwm/]] both very involved with JPEG 2000 development wrote the book [[JPEG2000: Image Compression Fundamentals, Practice and Standards|http://www.amazon.com/gp/product/079237519X/ref=pd_bxgy_text_b/002-9477693-4397643?%5Fencoding=UTF8]], Kluwer Academic Publishers, 2001, it is both a text book on image compression in general, and an explaination of the standard. Not only that, but it comes with an early version of the kakadu software including source code. \n \nMichael W. Marcellin and I gave "[[An Overview of JPEG2000|http://www.rii.ricoh.com/%7Egormish/pdf/dcc2000_jpeg2000_note.pdf]]" at the invited mid-day presentation of the [[Data Compression Conference|http://www.cs.brandeis.edu/%7Edcc/]] in March 2000 at Snowbird, Utah. The [[slides|http://www.rii.ricoh.com/%7Egormish/pdf/dcc2000_jpeg2000_joint_charts.pdf]] we used in the presentation are also available.\n \nI chaired a [[special session on JPEG 2000|http://icip2000.ece.ubc.ca/ta.html#TA02]] at ICIP 2000. The goal was to provide the attendees a complete and comprehensive picture of the new standard at one place. For future ICIP conferences this session will provide a baseline to compare against. In addition, because standards must contain complete technical specification they do not always provide the best "big picture." This session should provide the "big ideas" reference for JPEG 2000, people interested in the standard but not actually implementing it from scratch will be better served by referring to ICIP-2000 than to the standard.\n \nBernie Brower chaired a session on JPEG 2000 at SPIE's annual meeting in [[2000|http://spie.org/web/meetings/programs/am00/confs/4115.html]], and in [[2001|http://spie.org/conferences/calls/01/am/confs/AM302.html]], and [[2002|http://spie.org/Conferences/Programs/02/am/confs/4790.html]] and 2003.\n \nDavid Taubman, "High Performance Scalable Image Compression with EBCOT," //IEEE Transactions on Image Processing//, A great explanation of layers, rate-distortion optimization, wavelet context models and many other things.\n \nMajid Rabbani and Rajan Joshi, "An Overview of the ~JPEG2000 Still Image Compression Standard," Signal Processing: Image Communication Journal, Volume 17, Number 1, October 2001. \n\n[[Ambarish Natu|http://www.angelfire.com/ak4/ambarishnatuatunsw/1_page.htm]] has written about JPEG 2000 Part 11, wireless. There is also a quite readable article on wirelesss JPEG 2000 for video on the [[Video/Imaging Design Line website|http://www.videsignline.com/howto/showArticle.jhtml?articleId=186500805]].\n\n

JPEG 2000 generated so much interest in the ISO that everyone wanted a piece of the action. In addition to the "Core Coding System" there is also:\n\n|!Part|!Title|!Description|\n|2|Extensions|Things that were too specialized for Part 1, but useful for some applications. (IS)|\n|3|Motion JPEG 2000|Frame by frame JPEG 2000 won't be as efficient as MPEG, but provides a high quality editing standard, with a file format matched to ~MPEG-4 and Quicktime. (IS)|\n|4|Conformance|Defines three Cclasses, which are quality levels for a decoder. Developers of encoders will also want to examine the standard to know what a decoder is required to do (IS).|\n|5|Reference Software|The goal is to make the standard easily useable. (IS), Ammendments and Corrections coming. First Ammendment adds support for the file format. |\n|6|JPM|Bringing Mixed Raster Content to JPEG 2000. (IS)|\n|7|Withdrawn.|\n|8|Secure JPEG 2000|A work in progress to define a way to secure various portions of an image. Perhaps any one can view the low resolution data, but only paying customers can make use of the full quality image. (FDIS)|\n|9|Interactivity tools, APIs, and protocols.|There appears to be a need to standardize mechanisms for interacting with a JPEG 2000 file to take advantage of the features of JPEG 2000. (IS)|\n|10|3-D and floating point data|Take advantage of correlation between multiple images better than with just a point transform as defined in Part 2. (WD)|\n|11|Wireless|What special error protection, detection, correction procedures can be used with JPEG 2000? (WD)|\n|12|ISO Base Media File Format.|Part 3 motion JPEG 2000 borrowed the file format from MPEG-4 Part 4 (a great idea, this makes it really easy to parse Motion JPEG 2000 and MPEG-4 with the same code). Then someone realized that some items were defined both in MPEG-4 Part 4 and JPEG 2000 Part 3. So to simplify things, the common part was removed from both parts and reissued as one document that is both MPEG-4 Part 12 and JPEG 2000 Part 12. Now, in theory if you order JPEG 2000 Part 3 which happens to have the common file format part removed, your supposed to automatically get Part 12. If you don't get it, we've requested that it be available for free download. (IS)|\n|13|Reference Encoder|Part 1 was a decoder and codestream standard, this part intends to provide a canonical example of encoding.|\n\n|JPEG 2000 Part 1, Amendment 1|Codestream Restrictions|Also known as profiles. Greatest compatibility with decoders is possible by using only Profile 0, more features are available in Profile 1. Included in the 2nd edition of Part 1. Part 4 makes use of these profiles to define test suites for decoders.|\n|JPEG 2000 Part 1, Amendment 2|Inclusion of additional colorspace|A change to the optional file format of Part I to support a YCC color space in addition to sRGB and grayscale. The biggest debate was what reference to use for the colorspace.|\n|JPEG 2000 Part 2, Amendment 1|Enhancement to quantization method - Allows changing quantization on the precinct basis.|\n|JPEG 2000 Part 1 Technical Corrigendum (1, 2, 3, &amp; 4)|Errata and clarifications for Part I. Essential to the proper implementation of JPEG 2000. (Included in 2nd edition of part 1)|\n

RecentNews\nTheIntroduction\nJPEG2000Parts\nJPEG2000FileFormats\nJPEG2000Compliance\nJPEG2000Literature\n\n[[JPEG2000Adoption|jpeg2000adoption.html]]\n[[JPEG2000BrowserSupport|jpeg2000browser.html]]\n[[Michael Gormish|index.html]]

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For upgrading directly from tiddlyspot. See [[ImportTiddlers]].\nURL: /proxy/mptw.tiddlyspot.com/upgrade.html\n

For upgrading. See [[ImportTiddlers]].\nURL: http://mptw.tiddlyspot.com/upgrade.html\n

/***\n| Name:|NewHerePlugin|\n| Description:|Creates the new here and new journal toolbar commands|\n| Version:|6.1.6|\n| Date:|06-Oct-2006|\n| Source:|http://mptw.tiddlyspot.com/#NewHerePlugin|\n| Author:|Simon Baird <simon.baird@gmail.com>|\n| CoreVersion:|2.1.x|\nTo use edit your ViewTemplate and add newHere to the toolbar div, eg\n{{{<div class='toolbar' macro='toolbar ... newHere'></div>}}}\nNote: would be good if we could do this instead some day\n{{{<<newTiddler tag:{{tiddler.title}} label:'new here'>>}}}\n***/\n//{{{\nmerge(config.commands,{\n\n newHere: {\n text: 'new here',\n tooltip: 'Create a new tiddler tagged as this tiddler',\n hideReadOnly: true,\n handler: function(e,src,title) {\n if (!readOnly) {\n clearMessage();\n var t=document.getElementById('tiddler'+title);\n story.displayTiddler(t,config.macros.newTiddler.title,DEFAULT_EDIT_TEMPLATE);\n story.setTiddlerTag(config.macros.newTiddler.title, title, 0);\n story.focusTiddler(config.macros.newTiddler.title,"title"); // doesn't work??\n return false;\n }\n }\n },\n\n newJournalHere: {\n //text: 'new journal here', // too long\n text: 'new journal',\n hideReadOnly: true,\n dataFormat: 'DD MMM YYYY', // adjust to your preference\n //dataFormat: 'YYYY-0MM-0DD', \n tooltip: 'Create a new journal tiddler tagged as this tiddler',\n handler: function(e,src,title) {\n if (!readOnly) {\n clearMessage();\n var now = new Date();\n var t=document.getElementById('tiddler'+title);\n var newtitle = now.formatString(this.dataFormat)\n story.displayTiddler(t,newtitle,DEFAULT_EDIT_TEMPLATE);\n story.setTiddlerTag(newtitle, title, 0);\n story.focusTiddler(newtitle,"title");\n return false;\n }\n }\n }\n\n});\n//}}}\n

Most of the JPEG 2000 standards are "joint" standards and thus available from both the [[ISO|http://www.iso.org/iso/en/ISOOnline.frontpage]] and the [[ITU|http://www.itu.int/ITU-T/]] not only that but these organizations have "tag" groups in the member nations that may provide access to the standards ([[ANSI|http://www.ansi.org/]] in the United States). The bad news is that most of the standards are expensive (cost is based on number of pages in some cases). Those working on the committee always want the standards to be available for free, and some of the JPEG ones are, but many are not.\n\nHowever, the ITU has a program to let you "try out" their [[store|http://ecs.itu.ch/cgi-bin/ebookshop]]. You can register and receive up to three standards for free.\n\nThe compliance standard for JPEG 2000 (Part 4) is (was) freely available. You can get the text standard from the [[sorry this link is broken let me know if you know a replacement|http://www.iso.ch/iso/en/ittf/PubliclyAvailableStandards/c033876_ISO_IEC_15444-4_2002(E).zip]] and the test files to go with it from [[my website|http://www.crc.ricoh.com/%7Egormish/jpeg2000conformance/]]

I've redone this page as a [[tiddlywiki|tiddlywiki.com]] to make it easier to update. The [[JPEG2000Adoption|jpeg2000adoption.html]] material has been moved to it's own page and is now searchable by category, the tests for [[JPEG2000BrowserSupport|jpeg2000browser.html]] are also on another page leaving JPEG2000Compliance, JPEG2000FileFormats, JPEG2000Parts, and JPEG2000Literature for this page.\n

[[MptwPageTemplate]]\n

/***\n| Name:|QuickOpenTagPlugin|\n| Description:|Changes tag links to make it easier to open tags as tiddlers|\n| Version:|6.1.1|\n| Date:|01-Oct-2006|\n| Source:|http://mptw.tiddlyspot.com/#QuickOpenTagPlugin|\n| Author:|Simon Baird <simon.baird@gmail.com>|\n| CoreVersion:|2.1.x|\n***/\n//{{{\nconfig.quickOpenTag = {\n\n dropdownChar: (document.all ? "\su25bc" : "\su25be"), // the little one doesn't work in IE\n\n createTagButton: function(place,tag,excludeTiddler) {\n // little hack so we can to <<tag PrettyTagName|RealTagName>>\n var splitTag = tag.split("|");\n var pretty = tag;\n if (splitTag.length == 2) {\n tag = splitTag[1];\n pretty = splitTag[0];\n }\n \n var sp = createTiddlyElement(place,"span",null,"quickopentag");\n createTiddlyText(createTiddlyLink(sp,tag,false),pretty);\n \n var theTag = createTiddlyButton(sp,config.quickOpenTag.dropdownChar,\n config.views.wikified.tag.tooltip.format([tag]),onClickTag);\n theTag.setAttribute("tag",tag);\n if (excludeTiddler)\n theTag.setAttribute("tiddler",excludeTiddler);\n return(theTag);\n },\n\n miniTagHandler: function(place,macroName,params,wikifier,paramString,tiddler) {\n var tagged = store.getTaggedTiddlers(tiddler.title);\n if (tagged.length > 0) {\n var theTag = createTiddlyButton(place,config.quickOpenTag.dropdownChar,\n config.views.wikified.tag.tooltip.format([tiddler.title]),onClickTag);\n theTag.setAttribute("tag",tiddler.title);\n theTag.className = "miniTag";\n }\n },\n\n allTagsHandler: function(place,macroName,params) {\n var tags = store.getTags();\n var theDateList = createTiddlyElement(place,"ul");\n if(tags.length == 0)\n createTiddlyElement(theDateList,"li",null,"listTitle",this.noTags);\n for (var t=0; t<tags.length; t++) {\n var theListItem = createTiddlyElement(theDateList,"li");\n var theLink = createTiddlyLink(theListItem,tags[t][0],true);\n var theCount = " (" + tags[t][1] + ")";\n theLink.appendChild(document.createTextNode(theCount));\n var theDropDownBtn = createTiddlyButton(theListItem," " +\n config.quickOpenTag.dropdownChar,this.tooltip.format([tags[t][0]]),onClickTag);\n theDropDownBtn.setAttribute("tag",tags[t][0]);\n }\n },\n\n // todo fix these up a bit\n styles: \n"/*{{{*/\sn"+\n"/* created by QuickOpenTagPlugin */\sn"+\n".tagglyTagged .quickopentag, .tagged .quickopentag \sn"+\n" { margin-right:1.2em; border:1px solid #eee; padding:2px; padding-right:0px; padding-left:1px; }\sn"+\n".quickopentag .tiddlyLink { padding:2px; padding-left:3px; }\sn"+\n".quickopentag a.button { padding:1px; padding-left:2px; padding-right:2px;}\sn"+\n"/* extra specificity to make it work right */\sn"+\n"#displayArea .viewer .quickopentag a.button, \sn"+\n"#displayArea .viewer .quickopentag a.tiddyLink, \sn"+\n"#mainMenu .quickopentag a.tiddyLink, \sn"+\n"#mainMenu .quickopentag a.tiddyLink \sn"+\n" { border:0px solid black; }\sn"+\n"#displayArea .viewer .quickopentag a.button, \sn"+\n"#mainMenu .quickopentag a.button \sn"+\n" { margin-left:0px; padding-left:2px; }\sn"+\n"#displayArea .viewer .quickopentag a.tiddlyLink, \sn"+\n"#mainMenu .quickopentag a.tiddlyLink \sn"+\n" { margin-right:0px; padding-right:0px; padding-left:0px; margin-left:0px; }\sn"+\n"a.miniTag {font-size:150%;} \sn"+\n"#mainMenu .quickopentag a.button \sn"+\n" /* looks better in right justified main menus */\sn"+\n" { margin-left:0px; padding-left:2px; margin-right:0px; padding-right:0px; }\sn" + \n"#topMenu .quickopentag { padding:0px; margin:0px; border:0px; }\sn" +\n"#topMenu .quickopentag .tiddlyLink { padding-right:1px; margin-right:0px; }\sn" +\n"#topMenu .quickopentag .button { padding-left:1px; margin-left:0px; border:0px; }\sn" +\n"/*}}}*/\sn"+\n "",\n\n init: function() {\n // we fully replace these builtins. can't hijack them easily\n window.createTagButton = this.createTagButton;\n config.macros.allTags.handler = this.allTagsHandler;\n config.macros.miniTag = { handler: this.miniTagHandler };\n config.shadowTiddlers["QuickOpenTagStyles"] = this.styles;\n if (store)\n store.addNotification("QuickOpenTagStyles",refreshStyles);\n else\n config.notifyTiddlers.push({name:"QuickOpenTagStyles", notify: refreshStyles});\n }\n\n}\n\nconfig.quickOpenTag.init();\n\n//}}}\n

Microsoft continues to push a competitor to ~JPEG2000 once called HD Photo (formerly Windows Media Photo). After 7+ years, they've come up with something that compresses about the same, but they claim less computation, which is likely true. I'm curious to know if it //truly// has the same set of features e.g. spatial and resolution access, and a protocol for network delivery of portions of the data. I will give them credit for releasing a porting kit with C code.\n\nMeanwhile JPEG 2000 usage has grown, not as quickly as I'd like, but it is making substancial gains in the movie, large imagery, and medical fields. See the [[JPEG2000Adoption|jpeg2000adoption.html]] page.

/***\n| Name:|RenameTagsPlugin|\n| Description:|Allows you to easily rename or delete tags across multiple tiddlers|\n| Version:|6.1.18|\n| Date:|18-Oct-2006|\n| Source:|http://mptw.tiddlyspot.com/#RenameTagsPlugin|\n| Author:|Simon Baird <simon.baird@gmail.com>|\n| CoreVersion:|2.1.x|\nRename a tag and you will be prompted to rename it in all its tagged tiddlers.\n***/\n//{{{\nconfig.renameTags = {\n\n prompts: {\n rename: "Rename the tag '%0' to '%1' in %2 tidder%3?",\n remove: "Remove the tag '%0' from %1 tidder%2?"\n },\n\n removeTag: function(tag,tiddlers) {\n store.suspendNotifications();\n for (var i=0;i<tiddlers.length;i++) {\n store.setTiddlerTag(tiddlers[i].title,false,tag);\n }\n store.resumeNotifications();\n store.notifyAll();\n },\n\n renameTag: function(oldTag,newTag,tiddlers) {\n store.suspendNotifications();\n for (var i=0;i<tiddlers.length;i++) {\n store.setTiddlerTag(tiddlers[i].title,false,oldTag); // remove old\n store.setTiddlerTag(tiddlers[i].title,true,newTag); // add new\n }\n store.resumeNotifications();\n store.notifyAll();\n },\n\n storeMethods: {\n\n saveTiddler_orig_renameTags: TiddlyWiki.prototype.saveTiddler,\n\n saveTiddler: function(title,newTitle,newBody,modifier,modified,tags,fields) {\n if (title != newTitle) {\n var tagged = this.getTaggedTiddlers(title);\n if (tagged.length > 0) {\n // then we are renaming a tag\n if (confirm(config.renameTags.prompts.rename.format([title,newTitle,tagged.length,tagged.length>1?"s":""])))\n config.renameTags.renameTag(title,newTitle,tagged);\n\n if (!this.tiddlerExists(title) && newBody == "")\n // dont create unwanted tiddler\n return null;\n }\n }\n return this.saveTiddler_orig_renameTags(title,newTitle,newBody,modifier,modified,tags,fields);\n },\n\n removeTiddler_orig_renameTags: TiddlyWiki.prototype.removeTiddler,\n\n removeTiddler: function(title) {\n var tagged = this.getTaggedTiddlers(title);\n if (tagged.length > 0)\n if (confirm(config.renameTags.prompts.remove.format([title,tagged.length,tagged.length>1?"s":""])))\n config.renameTags.removeTag(title,tagged);\n return this.removeTiddler_orig_renameTags(title);\n }\n\n },\n\n init: function() {\n merge(TiddlyWiki.prototype,this.storeMethods);\n }\n}\n\nconfig.renameTags.init();\n\n//}}}\n\n

Gormish Notes on the family of standards and it's usage

JPEG 2000

[[MptwStyleSheet]]\n

/***\n| Name:|TagglyTaggingPlugin|\n| Description:|tagglyTagging macro is a replacement for the builtin tagging macro in your ViewTemplate|\n| Version:|6.1.5|\n| Date:|05-Oct-2006|\n| Source:|http://mptw.tiddlyspot.com/#TagglyTaggingPlugin|\n| Author:|Simon Baird <simon.baird@gmail.com>|\n| CoreVersion:|2.1.x|\n!Notes\nSee http://mptw.tiddlyspot.com/#TagglyTagging\n***/\n//{{{\nconfig.taggly = {\n\n // for translations\n lingo: {\n labels: {\n asc: "\su2191", // down arrow\n desc: "\su2193", // up arrow\n title: "title",\n modified: "modified",\n created: "created",\n show: "+",\n hide: "-",\n normal: "normal",\n group: "group",\n commas: "commas",\n sitemap: "sitemap",\n numCols: "cols\su00b1", // plus minus sign\n label: "Tagged as '%0':"\n },\n\n tooltips: {\n title: "Click to sort by title",\n modified: "Click to sort by modified date",\n created: "Click to sort by created date",\n show: "Click to show tagging list",\n hide: "Click to hide tagging list",\n normal: "Click to show a normal ungrouped list",\n group: "Click to show list grouped by tag",\n sitemap: "Click to show a sitemap style list",\n commas: "Click to show a comma separated list",\n numCols: "Click to change number of columns"\n }\n },\n\n config: {\n showTaggingCounts: true,\n listOpts: {\n // the first one will be the default\n sortBy: ["title","modified","created"],\n sortOrder: ["asc","desc"],\n hideState: ["show","hide"],\n listMode: ["normal","group","sitemap","commas"],\n numCols: ["1","2","3","4","5","6"]\n },\n valuePrefix: "taggly."\n },\n\n getTagglyOpt: function(title,opt) {\n var val = store.getValue(title,this.config.valuePrefix+opt);\n return val ? val : this.config.listOpts[opt][0];\n },\n\n setTagglyOpt: function(title,opt,value) {\n if (!store.tiddlerExists(title))\n // create it silently\n store.saveTiddler(title,title,config.views.editor.defaultText.format([title]),config.options.txtUserName,new Date(),null);\n // if value is default then remove it to save space\n return store.setValue(title,\n this.config.valuePrefix+opt,\n value == this.config.listOpts[opt][0] ? null : value);\n },\n\n getNextValue: function(title,opt) {\n var current = this.getTagglyOpt(title,opt);\n var pos = this.config.listOpts[opt].indexOf(current);\n // a little usability enhancement. actually it doesn't work right for grouped or sitemap\n var limit = (opt == "numCols" ? store.getTaggedTiddlers(title).length : this.config.listOpts[opt].length);\n var newPos = (pos + 1) % limit;\n return this.config.listOpts[opt][newPos];\n },\n\n toggleTagglyOpt: function(title,opt) {\n var newVal = this.getNextValue(title,opt);\n this.setTagglyOpt(title,opt,newVal);\n }, \n\n createListControl: function(place,title,type) {\n var lingo = config.taggly.lingo;\n var label;\n var tooltip;\n var onclick;\n\n if ((type == "title" || type == "modified" || type == "created")) {\n // "special" controls. a little tricky. derived from sortOrder and sortBy\n label = lingo.labels[type];\n tooltip = lingo.tooltips[type];\n\n if (this.getTagglyOpt(title,"sortBy") == type) {\n label += lingo.labels[this.getTagglyOpt(title,"sortOrder")];\n onclick = function() {\n config.taggly.toggleTagglyOpt(title,"sortOrder");\n return false;\n }\n }\n else {\n onclick = function() {\n config.taggly.setTagglyOpt(title,"sortBy",type);\n config.taggly.setTagglyOpt(title,"sortOrder",config.taggly.config.listOpts.sortOrder[0]);\n return false;\n }\n }\n }\n else {\n // "regular" controls, nice and simple\n label = lingo.labels[type == "numCols" ? type : this.getNextValue(title,type)];\n tooltip = lingo.tooltips[type == "numCols" ? type : this.getNextValue(title,type)];\n onclick = function() {\n config.taggly.toggleTagglyOpt(title,type);\n return false;\n }\n }\n\n // hide button because commas don't have columns\n if (!(this.getTagglyOpt(title,"listMode") == "commas" && type == "numCols"))\n createTiddlyButton(place,label,tooltip,onclick,type == "hideState" ? "hidebutton" : "button");\n },\n\n makeColumns: function(orig,numCols) {\n var listSize = orig.length;\n var colSize = listSize/numCols;\n var remainder = listSize % numCols;\n\n var upperColsize = colSize;\n var lowerColsize = colSize;\n\n if (colSize != Math.floor(colSize)) {\n // it's not an exact fit so..\n upperColsize = Math.floor(colSize) + 1;\n lowerColsize = Math.floor(colSize);\n }\n\n var output = [];\n var c = 0;\n for (var j=0;j<numCols;j++) {\n var singleCol = [];\n var thisSize = j < remainder ? upperColsize : lowerColsize;\n for (var i=0;i<thisSize;i++) \n singleCol.push(orig[c++]);\n output.push(singleCol);\n }\n\n return output;\n },\n\n drawTable: function(place,columns,theClass) {\n var newTable = createTiddlyElement(place,"table",null,theClass);\n var newTbody = createTiddlyElement(newTable,"tbody");\n var newTr = createTiddlyElement(newTbody,"tr");\n for (var j=0;j<columns.length;j++) {\n var colOutput = "";\n for (var i=0;i<columns[j].length;i++) \n colOutput += columns[j][i];\n var newTd = createTiddlyElement(newTr,"td",null,"tagglyTagging"); // todo should not need this class\n wikify(colOutput,newTd);\n }\n return newTable;\n },\n\n createTagglyList: function(place,title) {\n switch(this.getTagglyOpt(title,"listMode")) {\n case "group": return this.createTagglyListGrouped(place,title); break;\n case "normal": return this.createTagglyListNormal(place,title,false); break;\n case "commas": return this.createTagglyListNormal(place,title,true); break;\n case "sitemap":return this.createTagglyListSiteMap(place,title); break;\n }\n },\n\n getTaggingCount: function(title) {\n // thanks to Doug Edmunds\n if (this.config.showTaggingCounts) {\n var tagCount = store.getTaggedTiddlers(title).length;\n if (tagCount > 0)\n return " ("+tagCount+")";\n }\n return "";\n },\n\n // this is for normal and commas mode\n createTagglyListNormal: function(place,title,useCommas) {\n\n var list = store.getTaggedTiddlers(title,this.getTagglyOpt(title,"sortBy"));\n\n if (this.getTagglyOpt(title,"sortOrder") == "desc")\n list = list.reverse();\n\n var output = [];\n for (var i=0;i<list.length;i++) {\n var countString = this.getTaggingCount(list[i].title);\n if (useCommas)\n output.push((i > 0 ? ", " : "") + "[[" + list[i].title + "]]" + countString);\n else\n output.push("*[[" + list[i].title + "]]" + countString + "\sn");\n }\n\n return this.drawTable(place,\n this.makeColumns(output,useCommas ? 1 : parseInt(this.getTagglyOpt(title,"numCols"))),\n useCommas ? "commas" : "normal");\n },\n\n // this is for the "grouped" mode\n createTagglyListGrouped: function(place,title) {\n var sortBy = this.getTagglyOpt(title,"sortBy");\n var sortOrder = this.getTagglyOpt(title,"sortOrder");\n\n var list = store.getTaggedTiddlers(title,sortBy);\n\n if (sortOrder == "desc")\n list = list.reverse();\n\n var leftOvers = []\n for (var i=0;i<list.length;i++)\n leftOvers.push(list[i].title);\n\n var allTagsHolder = {};\n for (var i=0;i<list.length;i++) {\n for (var j=0;j<list[i].tags.length;j++) {\n\n if (list[i].tags[j] != title) { // not this tiddler\n\n if (!allTagsHolder[list[i].tags[j]])\n allTagsHolder[list[i].tags[j]] = "";\n\n allTagsHolder[list[i].tags[j]] += "**[["+list[i].title+"]]"\n + this.getTaggingCount(list[i].title) + "\sn";\n leftOvers.setItem(list[i].title,-1); // remove from leftovers. at the end it will contain the leftovers\n }\n }\n }\n\n var allTags = [];\n for (var t in allTagsHolder)\n allTags.push(t);\n\n var sortHelper = function(a,b) {\n if (a == b) return 0;\n if (a < b) return -1;\n return 1;\n };\n\n allTags.sort(function(a,b) {\n var tidA = store.getTiddler(a);\n var tidB = store.getTiddler(b);\n if (sortBy == "title") return sortHelper(a,b);\n else if (!tidA && !tidB) return 0;\n else if (!tidA) return -1;\n else if (!tidB) return +1;\n else return sortHelper(tidA[sortBy],tidB[sortBy]);\n });\n\n var leftOverOutput = "";\n for (var i=0;i<leftOvers.length;i++)\n leftOverOutput += "*[["+leftOvers[i]+"]]" + this.getTaggingCount(leftOvers[i]) + "\sn";\n\n var output = [];\n\n if (sortOrder == "desc")\n allTags.reverse();\n else if (leftOverOutput != "")\n // leftovers first...\n output.push(leftOverOutput);\n\n for (var i=0;i<allTags.length;i++)\n output.push("*[["+allTags[i]+"]]" + this.getTaggingCount(leftOvers[i]) + "\sn" + allTagsHolder[allTags[i]]);\n\n if (sortOrder == "desc" && leftOverOutput != "")\n // leftovers last...\n output.push(leftOverOutput);\n\n return this.drawTable(place,\n this.makeColumns(output,parseInt(this.getTagglyOpt(title,"numCols"))),\n "grouped");\n\n },\n\n // used to build site map\n treeTraverse: function(title,depth,sortBy,sortOrder) {\n\n var list = store.getTaggedTiddlers(title,sortBy);\n if (sortOrder == "desc")\n list.reverse();\n\n var indent = "";\n for (var j=0;j<depth;j++)\n indent += "*"\n\n var childOutput = "";\n for (var i=0;i<list.length;i++)\n if (list[i].title != title)\n childOutput += this.treeTraverse(list[i].title,depth+1,sortBy,sortOrder);\n\n if (depth == 0)\n return childOutput;\n else\n return indent + "[["+title+"]]" + this.getTaggingCount(title) + "\sn"+childOutput;\n },\n\n // this if for the site map mode\n createTagglyListSiteMap: function(place,title) {\n var output = this.treeTraverse(title,0,this.getTagglyOpt(title,"sortBy"),this.getTagglyOpt(title,"sortOrder"));\n return this.drawTable(place,\n this.makeColumns(output.split(/(?=^\s*\s[)/m),parseInt(this.getTagglyOpt(title,"numCols"))), // regexp magic\n "sitemap"\n );\n },\n\n macros: {\n tagglyTagging: {\n handler: function (place,macroName,params,wikifier,paramString,tiddler) {\n var refreshContainer = createTiddlyElement(place,"div");\n // do some refresh magic to make it keep the list fresh - thanks Saq\n refreshContainer.setAttribute("refresh","macro");\n refreshContainer.setAttribute("macroName",macroName);\n refreshContainer.setAttribute("title",tiddler.title);\n this.refresh(refreshContainer);\n },\n\n refresh: function(place) {\n var title = place.getAttribute("title");\n removeChildren(place);\n if (store.getTaggedTiddlers(title).length > 0) {\n var lingo = config.taggly.lingo;\n config.taggly.createListControl(place,title,"hideState");\n if (config.taggly.getTagglyOpt(title,"hideState") == "show") {\n createTiddlyElement(place,"span",null,"tagglyLabel",lingo.labels.label.format([title]));\n config.taggly.createListControl(place,title,"title");\n config.taggly.createListControl(place,title,"modified");\n config.taggly.createListControl(place,title,"created");\n config.taggly.createListControl(place,title,"listMode");\n config.taggly.createListControl(place,title,"numCols");\n config.taggly.createTagglyList(place,title);\n }\n }\n }\n }\n },\n\n // todo fix these up a bit\n styles: \n"/*{{{*/\sn"+\n"/* created by TagglyTaggingPlugin */\sn"+\n".tagglyTagging { padding-top:0.5em; }\sn"+\n".tagglyTagging li.listTitle { display:none; }\sn"+\n".tagglyTagging ul {\sn"+\n" margin-top:0px; padding-top:0.5em; padding-left:2em;\sn"+\n" margin-bottom:0px; padding-bottom:0px;\sn"+\n"}\sn"+\n".tagglyTagging { vertical-align: top; margin:0px; padding:0px; }\sn"+\n".tagglyTagging table { margin:0px; padding:0px; }\sn"+\n".tagglyTagging .button { display:none; margin-left:3px; margin-right:3px; }\sn"+\n".tagglyTagging .button, .tagglyTagging .hidebutton {\sn"+\n" color:[[ColorPalette::TertiaryLight]]; font-size:90%;\sn"+\n" border:0px; padding-left:0.3em;padding-right:0.3em;\sn"+\n"}\sn"+\n".tagglyTagging .button:hover, .hidebutton:hover {\sn"+\n" background:[[ColorPalette::TertiaryPale]]; color:[[ColorPalette::TertiaryDark]];\sn"+\n"}\sn"+\n".selected .tagglyTagging .button {\sn"+\n" display:inline;\sn"+\n"}\sn"+\n".tagglyTagging .hidebutton { color:[[ColorPalette::Background]]; }\sn"+\n".selected .tagglyTagging .hidebutton { color:[[ColorPalette::TertiaryLight]] }\sn"+\n".tagglyLabel { color:[[ColorPalette::TertiaryMid]]; font-size:90%; }\sn"+\n".tagglyTagging ul {padding-top:0px; padding-bottom:0.5em; margin-left:1em; }\sn"+\n".tagglyTagging ul ul {list-style-type:disc; margin-left:-1em;}\sn"+\n".tagglyTagging ul ul li {margin-left:0.5em; }\sn"+\n".editLabel { font-size:90%; padding-top:0.5em; }\sn"+\n".tagglyTagging .commas { padding-left:1.8em; }\sn"+\n"/*}}}*/\sn"+\n "",\n\n init: function() {\n merge(config.macros,this.macros);\n config.shadowTiddlers["TagglyTaggingStyles"] = this.styles;\n if (store)\n store.addNotification("TagglyTaggingStyles",refreshStyles);\n else\n config.notifyTiddlers.push({name:"TagglyTaggingStyles", notify: refreshStyles});\n }\n};\n\nconfig.taggly.init();\n\n//}}}\n\n

On January 2, 2001 JPEG 2000 Image Compression System: Part I Core Coding System passed the vote to become ISO/IEC 15444-1 i.e. an international standard. It is also ~ITU-T Rec. T.800 and thus a "joint" international standard.\n\nThe official JPEG web site is [[www.jpeg.org|www.jpeg.org]]. It contains a copy of the [[Final Committee Draft (FCD)|http://www.jpeg.org/FCD15444-1.htm]] of JPEG 2000 (and drafts of other parts). Note however that there were some technical changes between this draft and the final standard, see ObtainingStandards to get the text of the real standard.\n\nJPEG 2000 offers new ways to deal with compressed images. With ~JPEG2000 it is possible to extract various resolutions, qualities, components, or spatial regions without decompressing the entire file. New imaging workflows (especially internet imaging) will be enabled by the features of the new standard. Of course rate distortion performance will be improved over the original JPEG standard especially at extremely low bit-rates and at extremely high quality setting (including lossless). I argue JPEG 2000 will be useful for those who need the features in my [[Worth the Wait?|http://www.rii.ricoh.com/%7Egormish/pdf/mwscs99_j2k_worthwait.pdf]] paper.\n \nJPEG 2000 uses a wavelet transform and a bit-plane entropy coder to provide state-of-the-art compression. The features are similar to those of [[CREW|http://www.crc.ricoh.com/CREW/]], but the internals are fairly different.\n\nI think that currently the most exciting thing happening committee wise is JPIP (JPEG 2000 Interactive Protocol). Essentially this part of the standard defines a standard way to access a JPEG 2000 file over a network, making the features of JPEG 2000 much more useable.\n\nThe JPEG committee is now also working on "~JP-Search" and an "Advanced Image Codec."\n\n If you want to be listed on one of my pages send me ([[Michael Gormish|index.html]]) an email from a human! \n \n

/***\n| Name:|ToggleTagMacro|\n| Description:|Makes a checkbox which toggles a tag in a tiddler|\n| Version:|6.1.2|\n| Date:|20-Oct-2006|\n| Source:|http://tiddlyspot.com/mptw/#ToggleTagMacro|\n| Author:|SimonBaird|\n| License:|[[BSD open source license]]|\n| CoreVersion:|2.1|\n!Usage\n{{{<<toggleTag }}}//{{{TagName TiddlerName LabelText}}}//{{{>>}}}\n* TagName - the tag to be toggled, default value "checked"\n* TiddlerName - the tiddler to toggle the tag in, default value the current tiddler\n* LabelText - the text (gets wikified) to put next to the check box, default value is '{{{[[TagName]]}}}' or '{{{[[TagName]] [[TiddlerName]]}}}'\n(If a parameter is '.' then the default will be used)\n\nExamples:\n\n|Code|Description|Example|h\n|{{{<<toggleTag>>}}}|Toggles the default tag (checked) in this tiddler|<<toggleTag>>|\n|{{{<<toggleTag TagName>>}}}|Toggles the TagName tag in this tiddler|<<toggleTag TagName>>|\n|{{{<<toggleTag TagName TiddlerName>>}}}|Toggles the TagName tag in the TiddlerName tiddler|<<toggleTag TagName TiddlerName>>|\n|{{{<<toggleTag TagName TiddlerName 'click me'>>}}}|Same but with custom label|<<toggleTag TagName TiddlerName 'click me'>>|\n|{{{<<toggleTag . . 'click me'>>}}}|dot means use default value|<<toggleTag . . 'click me'>>|\n(Note if TiddlerName doesn't exist it will be silently created)\n\n!Known issues\n* Doesn't smoothly handle the case where you toggle a tag in a tiddler that is current open for editing. Should it stick the tag in the edit box?\n\n***/\n//{{{\n\nmerge(config.macros,{\n\n toggleTag: {\n\n doRefreshAll: true,\n createIfRequired: true,\n shortLabel: "[[%0]]",\n longLabel: "[[%0]] [[%1]]",\n\n handler: function(place,macroName,params,wikifier,paramString,tiddler) {\n var tag = (params[0] && params[0] != '.') ? params[0] : "checked";\n var title = (params[1] && params[1] != '.') ? params[1] : tiddler.title;\n var defaultLabel = (title == tiddler.title ? this.shortLabel : this.longLabel);\n var label = (params[2] && params[2] != '.') ? params[2] : defaultLabel;\n var theTiddler = title == tiddler.title ? tiddler : store.getTiddler(title);\n var cb = createTiddlyCheckbox(place, label.format([tag,title]), theTiddler && theTiddler.isTagged(tag), function(e) {\n if (!store.tiddlerExists(title)) {\n if (config.macros.toggleTag.createIfRequired) {\n var content = store.getTiddlerText(title); // just in case it's a shadow\n store.saveTiddler(title,title,content?content:"",config.options.txtUserName,new Date(),null);\n }\n else \n return false;\n }\n //store.suspendNotifications(); \n store.setTiddlerTag(title,this.checked,tag);\n //refreshDisplay(); \n //store.resumeNotifications();\n return true;\n });\n }\n }\n});\n\n//}}}\n\n

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