In the next few assignments, we’ll take a look at the most common image formats for the web. And we will figure out where and how they can best be used for creating a layout.
The first format is JPEG. This format is well suited for photos and images, and it is poorly suited for diagrams, drawings, text, and graphics.
When saving an image in JPEG format, you can set the quality level. This allows you to reduce the file size while still retaining fairly good image quality.
However, if you set the quality level too low, artifacts will appear.
JPEG does not support transparency, so a JPEG image is always a rectangle. You can simulate transparency by setting the background color of the image in the graphics editor to match the contents of the photo container.
Use JPEG for posting photos, since it provides the best file size/quality ratio.
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The background-color Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-image">2. The background-image Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-repeat">3. The background-repeat Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-position">4. The background-position Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-position-2">5. A Little More on background-position</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-attachment">6. The background-attachment Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-property">7. The background Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/summary-1">8. Summary of “Backgrounds: An Introduction. Part 1”</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/challenge-1">9. Challenge: Cat Comics</a></li><li class="main-nav__course-contents-item main-nav__course-contents-item--current"><a href="/courses/advanced-styling/backgrounds/jpeg-format">10. JPEG format</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/png-8-format">11. The PNG-8 Format</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/png-24-format">12. PNG-24 format</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/gif-format">13. 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2.334.725-.13.837-1.46.93-2.13h.112c.937.492 1.647 1.33 1.98 2.334-.388.176-.793.31-1.21.4zm18.365-2.864c-1.104-.145-2.215-.232-3.33-.26-.546-.01-1.093.05-1.626.176-1.166.483-2.08 1.425-2.53 2.604l-.158.79 1.795.623c.558.153 1.132.24 1.71.26h.28c3.245-.177 4.137-3.72 4.137-3.72l.084-.353zm-1.264 1.86c-.54 1.394-2.882 1.646-2.966 1.646-.517-.02-1.03-.11-1.525-.26-.186-.085-.633-.26-1.08-.43.374-.966 1.117-1.746 2.065-2.165 0 .68.158 1.953.81 2.083.65.13.613-1.535.566-2.26.934.005 1.865.064 2.79.177-.11.316-.473.65-.66 1.17z" fill="#151841"/><path d="M19.26 39.27c.535 1.362 1.56 2.473 2.874 3.115.534.312 1.204-.07 1.207-.69.002-.285-.15-.55-.397-.695-.918-.46-1.65-1.222-2.073-2.158-.344-.957-1.972-.52-1.61.428zm29.45 3.125c1.083-.59 2.01-1.428 2.706-2.446.3-.556-.112-1.228-.743-1.21-.293.007-.56.17-.698.428-.568.776-1.306 1.412-2.158 1.86-.394.23-.517.742-.27 1.125.263.376.773.482 1.163.242z" fill="#EFA75B" stroke-width="13"/><path d="M16.025 32.436c1.525-1.386 2.427-4.408 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3.896.106.328.5.46.78.26.273.192.653.06.745-.26.735-2.66-1.6-5.728-3.766-7.16z" fill="#F1662A"/></svg></span><p class="course-loading-overlay__message"><b class="course-loading-overlay__message-title">Loading…</b><br><span class="course-loading-overlay__message-text">Everything will be ready in few seconds</span></p></div></div><div class="course-layout__sidebar course-theory"><div class="course-theory__inner course-theory__inner--left-stub"><button class="course-theory__close icon-close icon-close--light" type="button">Close</button><ul class="course-tabs course-tabs--non-interactive course-layout__theory-heading js--theory-tabs"><li class="course-tabs__item course-tabs__item--external course-tab course-tab--centered"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered course-tab--active js--theory-tab__theory"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered js--theory-tab__comments"><span class="course-tab__icon"><svg aria-hidden="true" style="width: 16px; height: 16px; fill: #2e2c9c;"><use xlink:href="/img/sprites/up.svg#comment"></use></svg></span><span class="course-tab__title">Comments</span></li></ul><section class="course-theory__content"><div class="js--theory-pane__theory course-theory__content-inner"><h1 class="course-theory__content-heading">JPEG format</h1><div class="course-theory__content-text"><p>In the next few assignments, we’ll take a look at the most common image formats for the web. And we will figure out where and how they can best be used for creating a layout.</p><p>The first format is <a href="https://en.wikipedia.org/wiki/JPEG" target="_blank" rel="nofollow noopener">JPEG</a>. This format is well suited for photos and images, and it is poorly suited for diagrams, drawings, text, and graphics.</p><p>When saving an image in JPEG format, you can set the quality level. This allows you to reduce the file size while still retaining fairly good image quality.</p><p>However, if you set the quality level too low, artifacts will appear.</p><p>JPEG does not support transparency, so a JPEG image is always a rectangle. You can simulate transparency by setting the background color of the image in the graphics editor to match the contents of the photo container.</p><p>Use JPEG for posting photos, since it provides the best file size/quality ratio.</p></div></div><div class="js--theory-pane__comments hidden course-theory__content-inner"><div class="course-theory__content-text"><h2 class="course-theory__content-heading">Comments</h2><div id="disqus_thread"></div><script>
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<title>JPEG format</title>
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<div class="box box1">
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box-shadow: 1px 1px 3px #999999;
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.box1 {
background-color: #2ecc71;
}
.box2 {
background-color: #f1c40f;
}
.box3 {
background-image: linear-gradient(to bottom, #2ecc71, #f1c40f);
}
.block {
height: 134px;
background-repeat: no-repeat;
background-position: 50% 50%;
}
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