forked from openkylin/imagemagick
148 lines
9.3 KiB
HTML
148 lines
9.3 KiB
HTML
|
|
|
|
|
|
|
|
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="utf-8" />
|
|
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
|
|
<title>ImageMagick - High Dynamic-Range Images</title>
|
|
<meta name="application-name" content="ImageMagick" />
|
|
<meta name="description" content="Use ImageMagick® to create, edit, compose, and convert bitmap images. Resize an image, crop it, change its shades and colors, add captions, and more." />
|
|
<meta name="application-url" content="https://legacy.imagemagick.org" />
|
|
<meta name="generator" content="PHP" />
|
|
<meta name="keywords" content="high, dynamic-range, images, image converter, image resizer, image editor, photo editor, jpg converter, png converter, tiff converter, vector images, online, free, swiss army" />
|
|
<meta name="rating" content="GENERAL" />
|
|
<meta name="robots" content="INDEX, FOLLOW" />
|
|
<meta name="generator" content="ImageMagick Studio LLC" />
|
|
<meta name="author" content="ImageMagick Studio LLC" />
|
|
<meta name="revisit-after" content="2 DAYS" />
|
|
<meta name="resource-type" content="document" />
|
|
<meta name="copyright" content="Copyright (c) 1999-2020 ImageMagick Studio LLC" />
|
|
<meta name="distribution" content="Global" />
|
|
<meta name="magick-serial" content="P131-S030410-R485315270133-P82224-A6668-G1245-1" />
|
|
<meta property='og:url' content='https://legacy.imagemagick.org/' />
|
|
<meta property='og:title' content='ImageMagick Legacy' />
|
|
<meta property='og:image' content='https://legacy.imagemagick.org/images/logo.png' />
|
|
<meta property='og:type' content='website' />
|
|
<meta property='og:site_name' content='ImageMagick Legacy' />
|
|
<meta property='og:description' content="Create, Edit, Compose, or Convert Bitmap Images" />
|
|
<meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4" />
|
|
<meta name="msvalidate.01" content="103012B23499FEB70AEA89C83C274AC7" />
|
|
<link href="high-dynamic-range.html" rel="canonical" />
|
|
<link href="../images/wand.png" rel="icon" />
|
|
<link href="../images/wand.ico" rel="shortcut icon" />
|
|
<link href="assets/magick.css" rel="stylesheet" />
|
|
</head>
|
|
<body>
|
|
<nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark">
|
|
<a class="navbar-brand" href="../index.html"><img class="d-block" id="wand" alt="ImageMagick" width="32" height="32" src="../images/wand.ico"/></a>
|
|
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsMagick" aria-controls="navbarsMagick" aria-expanded="false" aria-label="Toggle navigation">
|
|
<span class="navbar-toggler-icon"></span>
|
|
</button>
|
|
|
|
<div class="navbar-collapse collapse" id="navbarsMagick" style="">
|
|
<ul class="navbar-nav mr-auto">
|
|
<li class="nav-item ">
|
|
<a class="nav-link" href="../index.html">Home <span class="sr-only">(current)</span></a>
|
|
</li>
|
|
<li class="nav-item ">
|
|
<a class="nav-link" href="download.html">Download</a>
|
|
</li>
|
|
<li class="nav-item ">
|
|
<a class="nav-link" href="command-line-tools.html">Tools</a>
|
|
</li>
|
|
<li class="nav-item ">
|
|
<a class="nav-link" href="command-line-processing.html">Command-line</a>
|
|
</li>
|
|
<li class="nav-item ">
|
|
<a class="nav-link" href="develop.html">Develop</a>
|
|
</li>
|
|
<li class="nav-item">
|
|
<a class="nav-link" target="_blank" href="https://github.com/ImageMagick/ImageMagick6/discussions">Community</a>
|
|
</li>
|
|
<li class="nav-item">
|
|
<iframe src="https://github.com/sponsors/ImageMagick/button" title="Sponsor ImageMagick" height="35" width="107" style="border: 0;"></iframe>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<form class="form-inline my-2 my-lg-0" action="https://legacy.imagemagick.org/script/search.php">
|
|
<input class="form-control mr-sm-2" type="text" name="q" placeholder="Search" aria-label="Search" />
|
|
<button class="btn btn-outline-success my-2 my-sm-0" type="submit" name="sa">Search</button>
|
|
</form>
|
|
</nav>
|
|
<div role="main" class="container">
|
|
<script async="async" src="https://localhost/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle"
|
|
style="display:block"
|
|
data-ad-client="ca-pub-3129977114552745"
|
|
data-ad-slot="6345125851"
|
|
data-full-width-responsive="true"
|
|
data-ad-format="horizontal"></ins>
|
|
<script>
|
|
(adsbygoogle = window.adsbygoogle || []).push({});
|
|
</script>
|
|
</div>
|
|
|
|
<main class="container">
|
|
<div class="magick-template">
|
|
<div class="magick-header">
|
|
<h1 class="text-center">High Dynamic-range Imaging</h1>
|
|
<p class="lead magick-description">High dynamic-range imaging (HDRI) permits a far greater dynamic range of exposures (i.e. a large difference between light and dark areas) than standard digital imaging techniques. HDRI accurately represents the wide range of intensity levels found in real scenes ranging from the brightest direct sunlight to the deepest darkest shadows. The HDR imaging approach includes:</p>
|
|
|
|
<ul>
|
|
<li>render/capture floating-point color space</li>
|
|
<li>encompass the entire perceivable gamut (extend values outside [0,1] range)</li>
|
|
<li>post-process in extended color space</li>
|
|
<li>apply tone-mapping for specific display</li>
|
|
</ul>
|
|
|
|
<h2><a class="anchor" id="enable"></a>Enabling HDRI in ImageMagick</h2>
|
|
|
|
<p>By default, image pixels in ImageMagick are stored as unsigned values that range from 0 to the quantum depth, which is typically 16-bits (Q16). With HDRI enabled, the pixels are stored in a floating-point representation and can include negative values as well as values that exceed the quantum depth. A majority of digital image formats do not support HDRI, and for those images any pixels outside the quantum range are clamped before they are stored.</p>
|
|
|
|
<p>The most promising HDR image format is EXR. You must have the <a href="http://www.openexr.org">OpenEXR</a> delegate library installed to read or write this format. Other HDR formats include TIFF 48-bit integer and 96-bit float formats, HDR, PFM, and ImageMagick's own MIFF format.</p>
|
|
|
|
<p>To enable the HDRI version of ImageMagick, use this Unix/Linux command:</p>
|
|
|
|
<pre class="highlight"><code>./configure --enable-hdri
|
|
</code></pre>
|
|
|
|
<p>Under Windows, set the <code>MAGICKCORE_HDRI_SUPPORT</code> definition in the <code>magick-baseconfig.h</code> configuration file and build.</p>
|
|
|
|
<p>To verify HDRI is properly configured, look for "HDRI" as a feature:</p>
|
|
|
|
<pre class="highlight"><code>identify -version
|
|
Features: HDRI
|
|
</code></pre>
|
|
</div>
|
|
</div>
|
|
</main><!-- /.container -->
|
|
<footer class="magick-footer">
|
|
<div class="container">
|
|
<p><a href="security-policy.html">Security</a> •
|
|
<a href="news.html">News</a>
|
|
|
|
<a href="high-dynamic-range.html#"><img class="d-inline" id="wand" alt="And Now a Touch of Magick" width="16" height="16" src="../images/wand.ico"/></a>
|
|
|
|
<a href="links.html">Related</a> •
|
|
<a href="sitemap.html">Sitemap</a>
|
|
<br/>
|
|
|
|
<a href="support.html">Sponsor</a> •
|
|
<a href="http://pgp.mit.edu/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> •
|
|
<a href="https://imagemagick.org/script/contact.php">Contact Us</a>
|
|
<br/>
|
|
<a href="https://github.com/imagemagick/imagemagick6" target="_blank" rel="noopener" aria-label="GitHub"><svg xmlns="http://www.w3.org/2000/svg" class="navbar-nav-svg" viewBox="0 0 512 499.36" width="2%" height="2%" role="img" focusable="false"><title>GitHub</title><path fill="currentColor" fill-rule="evenodd" d="M256 0C114.64 0 0 114.61 0 256c0 113.09 73.34 209 175.08 242.9 12.8 2.35 17.47-5.56 17.47-12.34 0-6.08-.22-22.18-.35-43.54-71.2 15.49-86.2-34.34-86.2-34.34-11.64-29.57-28.42-37.45-28.42-37.45-23.27-15.84 1.73-15.55 1.73-15.55 25.69 1.81 39.21 26.38 39.21 26.38 22.84 39.12 59.92 27.82 74.5 21.27 2.33-16.54 8.94-27.82 16.25-34.22-56.84-6.43-116.6-28.43-116.6-126.49 0-27.95 10-50.8 26.35-68.69-2.63-6.48-11.42-32.5 2.51-67.75 0 0 21.49-6.88 70.4 26.24a242.65 242.65 0 0 1 128.18 0c48.87-33.13 70.33-26.24 70.33-26.24 14 35.25 5.18 61.27 2.55 67.75 16.41 17.9 26.31 40.75 26.31 68.69 0 98.35-59.85 120-116.88 126.32 9.19 7.9 17.38 23.53 17.38 47.41 0 34.22-.31 61.83-.31 70.23 0 6.85 4.61 14.81 17.6 12.31C438.72 464.97 512 369.08 512 256.02 512 114.62 397.37 0 256 0z"/></svg></a> •
|
|
<a href="https://twitter.com/imagemagick" target="_blank" rel="noopener" aria-label="Twitter"><svg xmlns="http://www.w3.org/2000/svg" class="navbar-nav-svg" viewBox="0 0 512 416.32" width="2%" height="2%" role="img" focusable="false"><title>Twitter</title><path fill="currentColor" d="M160.83 416.32c193.2 0 298.92-160.22 298.92-298.92 0-4.51 0-9-.2-13.52A214 214 0 0 0 512 49.38a212.93 212.93 0 0 1-60.44 16.6 105.7 105.7 0 0 0 46.3-58.19 209 209 0 0 1-66.79 25.37 105.09 105.09 0 0 0-181.73 71.91 116.12 116.12 0 0 0 2.66 24c-87.28-4.3-164.73-46.3-216.56-109.82A105.48 105.48 0 0 0 68 159.6a106.27 106.27 0 0 1-47.53-13.11v1.43a105.28 105.28 0 0 0 84.21 103.06 105.67 105.67 0 0 1-47.33 1.84 105.06 105.06 0 0 0 98.14 72.94A210.72 210.72 0 0 1 25 370.84a202.17 202.17 0 0 1-25-1.43 298.85 298.85 0 0 0 160.83 46.92"/></svg></a>
|
|
<br/>
|
|
<small>© 1999-2021 ImageMagick Studio LLC</small></p>
|
|
</div>
|
|
</footer>
|
|
|
|
<!-- Javascript assets -->
|
|
<script>window.jQuery || document.write('<script src="assets/jquery.slim.min.js"><\/script>')</script><script src="assets/bootstrap.bundle.min.js" crossorigin="anonymous" />
|
|
</body>
|
|
</html>
|
|
<!-- Magick Cache 1st January 2021 18:37 -->
|