ISO/IEC 18477-4:2017 - Information technology — Scalable compression and coding of continuous-tone still images

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ISO/IEC 18477-4:2017 - Information technology — Scalable compression and coding of continuous-tone still images — Part 4: Conformance testing"></span> <span class="visually-hidden" id="itemReference_cs66072">ISO/IEC 18477-4:2017</span> <div class="visually-hidden" id="csNumber_cs66072">66072</div> <form class="box-option" id="form_cs66072"> <div class="mb-3"> <div class="section-head mb-1 text-sm"> Language</div> <div class="form-group"> <select class="form-select form-select-sm bkilang" id="bkilang_cs66072"> <option value="en" selected>English</option> </select> </div> </div> <div class="section-head mb-1 text-sm"> Format</div> <div class="formats formats_cs66072" id="bkifmt_cs66072_en" style="display: none;"><div class="form-check text-sm" id="bkifmt_cs66072_en_1"> <input class="form-check-input" data-type="std" data-price="151" checked="checked" type="radio" name="format_en" id="format_cs66072_en_1" value="01ub000000zGcPgAAK~a05b0000005WV2zAAG~a0fb000000XEoc8AAD~a0cb000000CM7NYAA1"/> <label class="form-check-label" for="format_cs66072_en_1">PDF + ePub</label> </div><div class="form-check text-sm" id="bkifmt_cs66072_en_2"> <input class="form-check-input" data-type="std" data-price="151" type="radio" name="format_en" id="format_cs66072_en_2" value="01ub000000zGcPgAAK~a05b0000005WV34AAG~a0fb000000XEnieAAD~a0cb000000CM6vYAAT"/> <label class="form-check-label" for="format_cs66072_en_2">Paper</label> </div></div></form> <div class="align-items-baseline box-price" itemprop="offers" itemscope itemtype="https://schema.org/Offer"> <div class="d-flex justify-content-center align-items-baseline gap-2"> <link itemprop="url" href="https://www.iso.org:-1/standard/66072.html" /> <meta itemprop="availability" content="https://schema.org/InStock" /> <span class="currency"><abbr title="Swiss francs" itemprop="priceCurrency">CHF</abbr></span> <span class="price d-flex align-items-baseline gap-2"> <span class="amount" id="productPrice_cs66072" itemprop="price">151</span> </span> </div> </div> <div class="d-grid orderBasket box-action pb-0"> <button id="add_cs66072" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#iso-optout" onclick="javascript:addToBasket('cs66072', '1', 'en', 'cs')"> Add to cart</button> </div> </div> <div id="priceConverter" class="smaller text-center p-3">Convert Swiss francs (CHF) to <a id="convertLink_cs66072" target="_blank" href="https://www.xe.com/en/currencyconverter/convert/?Amount=151&From=CHF&To=EUR">your currency</a></div> </div> </div> </div> </div> </section> <svg class="wave" preserveAspectRatio="none" viewBox="0 0 1440 96" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="m0 96 80-5.3C160 85 320 75 480 64s320-21 480-21.3c160 .3 320 10.3 400 16l80 5.3V0H0v96Z"></path></svg> <section id="product-details"> <div class="container"> <div class="row"> <div class="col-md-7"> <div class="d-flex justify-content-between align-items-center"><h2>Abstract</h2></div> <div itemprop="description"> <p><p>ISO/IEC 18477-4:2017 specifies the framework, concepts, methodology for testing, and criteria to be achieved to claim conformance to one or multiple parts of ISO/IEC 18477 as listed below. It provides a framework for specifying abstract test suites and for defining the procedures to be followed during conformance testing.</p> <p>ISO/IEC 18477-4:2017</p> <p>- specifies conformance testing procedures for decoding of ISO/IEC 18477‑1, 18477-2, ISO/IEC 18477‑6, ISO/IEC 18477‑7, ISO/IEC 18477‑8 and ISO/IEC 18477‑9,</p> <p>- specifies conformance testing procedures for codestreams to the above International Standards,</p> <p>- specifies codestreams, decoded images, and error metrics to be used within the decoder testing procedures, and</p> <p>- specifies abstract test suites.</p></p> </div> </div> <div class="col-md-4 col-md-offset-1"> <div class="d-flex justify-content-between align-items-center"> <h3>General information</h3> </div> <ul class="refine"> <li> <div class="" id="publicationStatus"> <div class="entry-label">Status</div> : <span>Published</span> </div> <div class="" id="publicationDate"> <div class="entry-label">Publication date</div> : <span itemprop="releaseDate">2017-10</span> </div> <div class="" id="stageId"> <div class="entry-label">Stage</div> : Close of review [<a class="page-scroll" href="#lifecycle">90.60</a>] </div> </li> <li> <div class=""> <div class="entry-label">Edition</div> : 1</div> <div class=""> <div class="entry-label">Number of pages</div> : 31</div> </li> <li> <div> <div class="entry-label">Technical Committee :</div> <span class="entry-name entry-block"> <a title="Coding of audio, picture, multimedia and hypermedia information" href="/committee/45316.html">ISO/IEC JTC 1/SC 29</a></span> </div> <div> <div class="entry-label"><abbr class="popover-primary" tabindex="0" role="button" data-bs-toggle="popover" data-bs-custom-class="popover-light text-sm shadow-sm pt-2" data-bs-trigger="focus" data-bs-placement="bottom" data-bs-content="International Classification for Standards">ICS</abbr> :</div> <span class="entry-name entry-block"> <a title="Coding of graphical and photographical information" href="/ics/35.040.30.html"> 35.040.30</a>  </span> </div> </li> <li class="text-xs"> <i class="bi-rss-fill me-1 align-baseline text-sm" style="color: #F99000;"></i><a href="/contents/data/standard/06/60/66072.detail.rss">RSS</a> updates</li> </ul> </div> </div> </div> </section> </div> <section id="lifecycle" class="z-2"> <div class="container"> <div class="row"> <div class="col-md-12"> <h3>Life cycle</h3> <div class="lifecycle"> <ul class="steps"> <li class="time-step"> <h4 class="ms-sm-3 text-muted">Now</h4> <div class="step step-success active"> <div class="section-head">Published</div> <h5>ISO/IEC 18477-4:2017</h5> <br/>A standard is reviewed every 5 years<br/><a data-bs-toggle="collapse" role="button" aria-expanded="false" href="#stages" class="dropdown-toggle current-stage text-sm collapsed">Stage: <strong>90.60</strong> (Under review)</a> </div> <ul class="stages collapse" id="stages"> <li class="dropdown alert-info"> <a href="javascript:void(0)" role="button" aria-haspopup="true" aria-expanded="false"> <span class="stage-code">00</span> <div class="stage-title">Preliminary</div> </a> </li> <li class="dropdown alert-info"> <a href="javascript:void(0)" class="dropdown-toggle" data-bs-display="static" data-bs-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"> <span class="stage-code">10</span> <div class="stage-title">Proposal</div> </a> <ul class="dropdown-menu"> <li > <a href="/stage-codes.html#10_99"> <span class="stage-code">10.99</span> <span class="stage-date">2014-01-28</span> <div class="stage-title"> New project approved</div> </a> </li></ul> </li> <li class="dropdown alert-info"> <a href="javascript:void(0)" role="button" aria-haspopup="true" aria-expanded="false"> <span class="stage-code">20</span> <div class="stage-title">Preparatory</div> </a> </li> <li class="dropdown alert-info"> <a href="javascript:void(0)" class="dropdown-toggle" data-bs-display="static" data-bs-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"> <span class="stage-code">30</span> <div class="stage-title">Committee</div> </a> <ul class="dropdown-menu"> <li > <a href="/stage-codes.html#30_00"> <span class="stage-code">30.00</span> <span class="stage-date">2015-09-08</span> <div class="stage-title"> Committee draft (CD) registered</div> </a> </li><li > <a href="/stage-codes.html#30_20"> <span class="stage-code">30.20</span> <span class="stage-date">2016-03-09</span> <div class="stage-title"> CD consultation initiated</div> </a> </li><li > <a href="/stage-codes.html#30_60"> <span class="stage-code">30.60</span> <span class="stage-date">2016-05-10</span> <div class="stage-title"> Close of comment period</div> </a> </li><li > <a href="/stage-codes.html#30_99"> <span class="stage-code">30.99</span> <span class="stage-date">2016-06-15</span> <div class="stage-title"> CD approved for registration as DIS</div> </a> </li></ul> </li> <li class="dropdown alert-info"> <a href="javascript:void(0)" class="dropdown-toggle" data-bs-display="static" data-bs-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"> <span class="stage-code">40</span> <div class="stage-title">Enquiry</div> </a> <ul class="dropdown-menu"> <li > <a href="/stage-codes.html#40_00"> <span class="stage-code">40.00</span> <span class="stage-date">2016-06-23</span> <div class="stage-title"> DIS registered</div> </a> </li><li > <a href="/stage-codes.html#40_20"> <span class="stage-code">40.20</span> <span class="stage-date">2016-08-30</span> <div class="stage-title"> DIS ballot initiated: 12 weeks</div> </a> </li><li > <a href="/stage-codes.html#40_60"> <span class="stage-code">40.60</span> <span class="stage-date">2016-11-23</span> <div class="stage-title"> Close of voting</div> </a> </li><li > <a href="/stage-codes.html#40_99"> <span class="stage-code">40.99</span> <span class="stage-date">2017-04-17</span> <div class="stage-title"> Full report circulated: DIS approved for registration as FDIS</div> </a> </li></ul> </li> <li class="dropdown alert-info"> <a href="javascript:void(0)" class="dropdown-toggle" data-bs-display="static" data-bs-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"> <span class="stage-code">50</span> <div class="stage-title">Approval</div> </a> <ul class="dropdown-menu"> <li > <a href="/stage-codes.html#50_00"> <span class="stage-code">50.00</span> <span class="stage-date">2017-06-16</span> <div class="stage-title"> Final text received or FDIS registered for formal approval</div> </a> </li><li > <a href="/stage-codes.html#50_20"> <span class="stage-code">50.20</span> <span class="stage-date">2017-06-19</span> <div class="stage-title"> Proof sent to secretariat or FDIS ballot initiated: 8 weeks</div> </a> </li><li > <a href="/stage-codes.html#50_60"> <span class="stage-code">50.60</span> <span class="stage-date">2017-08-16</span> <div class="stage-title"> Close of voting. Proof returned by secretariat</div> </a> </li></ul> </li> <li class="dropdown alert-success"> <a href="javascript:void(0)" class="dropdown-toggle" data-bs-display="static" data-bs-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"> <span class="stage-code">60</span> <div class="stage-title">Publication</div> </a> <ul class="dropdown-menu"> <li > <a href="/stage-codes.html#60_00"> <span class="stage-code">60.00</span> <span class="stage-date">2017-08-16</span> <div class="stage-title"> International Standard under publication</div> </a> </li><li > <a href="/stage-codes.html#60_60"> <span class="stage-code">60.60</span> <span class="stage-date">2017-10-27</span> <div class="stage-title"> International Standard published</div> </a> </li></ul> </li> <li class="dropdown bg-success active"> <a href="javascript:void(0)" class="dropdown-toggle" data-bs-display="static" data-bs-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"> <span class="stage-code">90</span> <div class="stage-title">Review</div> </a> <ul class="dropdown-menu"> <li class='list-separation'> <a href="/stage-codes.html#90_20"> <span class="stage-code">90.20</span> <span class="stage-date">2022-10-15</span> <div class="stage-title"> International Standard under systematic review</div> </a> </li><li class="active"> <a href="/stage-codes.html#90_60"> <span class="stage-code">90.60</span> <span class="stage-date">2023-03-05</span> <div class="stage-title"> Close of review</div> </a> </li><li class='list-separation'> <a href="/stage-codes.html#90_20"> <span class="stage-code">90.20</span> <span class="stage-date"></span> <div class="stage-title"> International Standard under systematic review</div> </a> </li><li > <a href="/stage-codes.html#90_60"> <span class="stage-code">90.60</span> <span class="stage-date"></span> <div class="stage-title"> Close of review</div> </a> </li><li > <a href="/stage-codes.html#90_92"> <span class="stage-code">90.92</span> <span class="stage-date"></span> <div class="stage-title"> International Standard to be revised</div> </a> </li><li > <a href="/stage-codes.html#90_93"> <span class="stage-code">90.93</span> <span class="stage-date"></span> <div class="stage-title"> International Standard confirmed</div> </a> </li><li > <a href="/stage-codes.html#90_99"> <span class="stage-code">90.99</span> <span class="stage-date"></span> <div class="stage-title"> Withdrawal of International Standard proposed by TC or SC</div> </a> </li></ul> </li> <li class="dropdown alert-muted"> <a href="javascript:void(0)" class="dropdown-toggle" data-bs-display="static" data-bs-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false"> <span class="stage-code">95</span> <div class="stage-title">Withdrawal</div> </a> <ul class="dropdown-menu"> <li > <a href="/stage-codes.html#95_99"> <span class="stage-code">95.99</span> <span class="stage-date"></span> <div class="stage-title"> Withdrawal of International Standard</div> </a> </li></ul> </li> </ul> <div class="sub-step sub-step-cor"> <div class="step step-success"> <h5>Corrigenda</h5> <div class="text-sm mb-2" style="max-width: 400px;">Correct the current edition; free; not included in the text of the existing standard.</div> <div class="step-item bg-success-subtle"> <div class="section-head">Published</div> <h5><a href="/standard/86313.html" class="text-success">ISO/IEC 18477-4:2017/Cor 1:2023</a></h5> </div></div> </div> </li> </ul> </div> </div> </div> </div> </section> <section class="text-center pt-0" id="section-sdg"> <div class="container"> <div class="row row-cols-1 row-cols-sm-2 row-cols-xl-3 g-4"> <div class="col"> <div class="card h-100 mb-0"> <div class="card-body"> <p> <img loading="lazy" src="/files/live/sites/isoorg/files/data/sdg/en/sdg-logo.png" class="img-fluid width-100pct rounded-0 mx-auto d-block" style="max-width: 250px;" alt="Sustainable Development Goals" /> </p> <p> This standard contributes to the following <a href="/sdg">Sustainable Development Goals</a><p> <div class="clearfix d-flex justify-content-center flex-wrap"> <a href="/sdg/SDG11.html" title="Sustainable Cities and Communities"> <div class="sdg sdg-sm sdg-11"> <div class="sdg-icon"></div> <div class="sdg-label">11</div> <div class="sdg-text">Sustainable Cities and Communities</div> <div class="sdg-logo"></div> </div> </a> <a href="/sdg/SDG09.html" title="Industry, Innovation and Infrastructure"> <div class="sdg sdg-sm sdg-09"> <div class="sdg-icon"></div> <div class="sdg-label">9</div> <div class="sdg-text">Industry, Innovation and Infrastructure</div> <div class="sdg-logo"></div> </div> </a> <a href="/sdg/SDG08.html" title="Decent Work and Economic Growth"> <div class="sdg sdg-sm sdg-08"> <div class="sdg-icon"></div> <div class="sdg-label">8</div> <div class="sdg-text">Decent Work and Economic Growth</div> <div class="sdg-logo"></div> </div> </a> </div> </div> </div> </div> </div> </div> </section> <section class="bg-lightgray" id="contact"> <div class="container"> <div class="row"> <div class="col-md-4"> <h4>Got a question?</h4> <p>Check out our <a href="/contact-iso.html" title="help-support">Help and Support</a></p></div> <div class="col-md-4"> </div> <div class="col-md-4"> </div> </div> </div> </section><div class="nav-breadcrumb print-footer bg-black"> <div class="container"> <div class="row"> <div class="col-sm-10 small">  <ol class="breadcrumb"> <li class="breadcrumb-item"><a href="/home.html" title="Home page"><i class="bi-house" aria-hidden="true"></i></a></li> <li class="breadcrumb-item"> <a href="/store.html">Store</a> </li> <li class="breadcrumb-item"> <a href="/standards-catalogue/browse-by-ics.html" >Standards catalogue</a> </li> <li class="breadcrumb-item"> <a href="/standards-catalogue/browse-by-ics.html">ICS</a> </li> <li class="breadcrumb-item"><a href="/en/ics/35.html">35</a></li> <li class="breadcrumb-item"><a href="/en/ics/35.040.html">35.040</a></li> <li class="breadcrumb-item"><a href="/en/ics/35.040.30.html">35.040.30</a></li><li class="breadcrumb-item">ISO/IEC 18477-4:2017</li></ol></div> <div class="col-sm-2 hidden-print text-end small mt-3 mt-sm-0"> <a role="button" class="dropdown-toggle text-white collapsed" data-bs-toggle="collapse" href="#collapseSitemap" target="_self" aria-expanded="false" aria-controls="collapseSitemap">Sitemap</a> </div> </div> <div class="collapse border-top" id="collapseSitemap"> <div class="row">  <nav role="navigation" aria-label="Sitemap" class="sitemap-footer clearfix small" id="nav-sitemap"><ul role='menubar' class='list-inline-5 clearfix nav-level1' ><li role='menuitem' class=' hasChildren firstInLevel' ><a class='nav-link ' title="Covering almost every product, process or service imaginable, ISO makes standards used everywhere." href='/standards.html'>Standards</a><ul role='menubar' class='list-unstyled nav-level2' ><li role='menuitem' class=' noChildren firstInLevel' ><a class='nav-link ' title="Whether you run a business, work for a company or government, or you are a consumer looking for goods and services that meet customer expectations: Find out what standards can do for you." href='/benefits-of-standards.html'>Benefits</a></li><li role='menuitem' class=' noChildren' ><a class='nav-link ' title="Here you can discover some of the best-known and most widely-used standards, as well as those that address recently emerged challenges affecting us all. 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resize_tooltip(tooltip) : false; return no_error; }; var needs_validate = function(el) { if(el.getAttribute('required') !== null){ return true } if(el.name === 'email' && el.value !== ""){ return true } if((el.id == 'field[]' || el.id == 'ca[11][v]') && el.className.includes('phone-input-error')){ return true } return false }; var validate_form = function(e) { var err = form_to_submit.querySelector('._form_error'), no_error = true; if (!submitted) { submitted = true; for (var i = 0, len = allInputs.length; i < len; i++) { var input = allInputs[i]; if (needs_validate(input)) { if (input.type == 'tel') { addEvent(input, 'blur', function() { this.value = this.value.trim(); validate_field(this, true); }); } if (input.type == 'text' || input.type == 'number' || input.type == 'time') { addEvent(input, 'blur', function() { this.value = this.value.trim(); validate_field(this, true); }); addEvent(input, 'input', function() { validate_field(this, true); }); } else if (input.type == 'radio' || input.type == 'checkbox') { (function(el) { var radios = form_to_submit.elements[el.name]; for (var i = 0; i < radios.length; i++) { addEvent(radios[i], 'click', function() { validate_field(el, true); }); } })(input); } else if (input.tagName == 'SELECT') { addEvent(input, 'change', function() { validate_field(this, true); }); } else if (input.type == 'textarea'){ addEvent(input, 'input', function() { validate_field(this, true); }); } } } } remove_tooltips(); for (var i = 0, len = allInputs.length; i < len; i++) { var elem = allInputs[i]; if (needs_validate(elem)) { if (elem.tagName.toLowerCase() !== "select") { elem.value = elem.value.trim(); } validate_field(elem) ? true : no_error = false; } } if (!no_error && e) { e.preventDefault(); } resize_tooltips(); return no_error; }; addEvent(window, 'resize', resize_tooltips); addEvent(window, 'scroll', resize_tooltips); var hidePhoneInputError = function(inputId) { var errorMessage = document.getElementById("error-msg-" + inputId); var input = document.getElementById(inputId); errorMessage.classList.remove("phone-error"); errorMessage.classList.add("phone-error-hidden"); input.classList.remove("phone-input-error"); }; var initializePhoneInput = function(input, defaultCountry) { return window.intlTelInput(input, { utilsScript: "https://unpkg.com/intl-tel-input@17.0.18/build/js/utils.js", autoHideDialCode: false, separateDialCode: true, initialCountry: defaultCountry, preferredCountries: [] }); } var setPhoneInputEventListeners = function(inputId, input, iti) { input.addEventListener('blur', function() { var errorMessage = document.getElementById("error-msg-" + inputId); if (input.value.trim()) { if (iti.isValidNumber()) { iti.setNumber(iti.getNumber()); if (errorMessage.classList.contains("phone-error")){ hidePhoneInputError(inputId); } } else { showPhoneInputError(inputId) } } else { if (errorMessage.classList.contains("phone-error")){ hidePhoneInputError(inputId); } } }); input.addEventListener("countrychange", function() { iti.setNumber(''); }); input.addEventListener("keydown", function(e) { var charCode = (e.which) ? e.which : e.keyCode; if (charCode > 31 && (charCode < 48 || charCode > 57) && charCode !== 8) { e.preventDefault(); } }); }; var showPhoneInputError = function(inputId) { var errorMessage = document.getElementById("error-msg-" + inputId); var input = document.getElementById(inputId); errorMessage.classList.add("phone-error"); errorMessage.classList.remove("phone-error-hidden"); input.classList.add("phone-input-error"); }; var form_submit = function(e) { e.preventDefault(); if (validate_form()) { // use this trick to get the submit button & disable it using plain javascript document.querySelector('#_form_23_submit').disabled = true; var _form_serialize_23 = function(form){if(!form||form.nodeName!=="FORM"){return }var i,j,q=[];for(i=0;i<form.elements.length;i++){if(form.elements[i].name===""){continue}switch(form.elements[i].nodeName){case"INPUT":switch(form.elements[i].type){case"tel":q.push(form.elements[i].name+"="+encodeURIComponent(form.elements[i].previousSibling.querySelector('div.iti__selected-dial-code').innerText)+encodeURIComponent(" ")+encodeURIComponent(form.elements[i].value));break;case"text":case"number":case"date":case"time":case"hidden":case"password":case"button":case"reset":case"submit":q.push(form.elements[i].name+"="+encodeURIComponent(form.elements[i].value));break;case"checkbox":case"radio":if(form.elements[i].checked){q.push(form.elements[i].name+"="+encodeURIComponent(form.elements[i].value))}break;case"file":break}break;case"TEXTAREA":q.push(form.elements[i].name+"="+encodeURIComponent(form.elements[i].value));break;case"SELECT":switch(form.elements[i].type){case"select-one":q.push(form.elements[i].name+"="+encodeURIComponent(form.elements[i].value));break;case"select-multiple":for(j=0;j<form.elements[i].options.length;j++){if(form.elements[i].options[j].selected){q.push(form.elements[i].name+"="+encodeURIComponent(form.elements[i].options[j].value))}}break}break;case"BUTTON":switch(form.elements[i].type){case"reset":case"submit":case"button":q.push(form.elements[i].name+"="+encodeURIComponent(form.elements[i].value));break}break}}return q.join("&")}; let serialized_23 = _form_serialize_23(document.getElementById('_form_23_')).replace(/%0A/g, '\\n'); var err = form_to_submit.querySelector('._form_error'); err ? 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ISO/IEC 18477-4:2017 - Information technology — Scalable compression and coding of continuous-tone still images — Part 4: Conformance testing