You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
153 lines
9.1 KiB
153 lines
9.1 KiB
|
|
|
|
|
|
|
|
<!doctype html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="utf-8" />
|
|
<meta name="viewport" content="width=device-width, initial-scale=1" />
|
|
<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 digital images. Resize an image, crop it, change its shades and colors, add captions, and more." />
|
|
<meta name="application-url" content="https://imagemagick.org" />
|
|
<meta name="generator" content="PHP" />
|
|
<meta name="keywords" content="high, dynamic-range, images, image processing software" />
|
|
<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='../' />
|
|
<meta property='og:title' content='ImageMagick' />
|
|
<meta property='og:image' content='../images/logo.png' />
|
|
<meta property='og:type' content='website' />
|
|
<meta property='og:site_name' content='ImageMagick' />
|
|
<meta property='og:description' content="Create, Edit, Compose, or Convert Digital Images" />
|
|
<meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4" />
|
|
<link href="../www/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 bg-dark fixed-top">
|
|
<div class="container-fluid">
|
|
<a class="navbar-brand" href="../index.html"><img class="d-block" id="icon" alt="ImageMagick" width="32" height="32" src="../images/wand.ico"/></a>
|
|
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#magick-navbars" aria-controls="magick-navbars" aria-expanded="false" aria-label="Toggle navigation">
|
|
<span class="navbar-toggler-icon"></span>
|
|
</button>
|
|
|
|
<div class="collapse navbar-collapse" id="magick-navbars">
|
|
<ul class="navbar-nav me-auto mb-2 mb-md-0">
|
|
<li class="nav-item">
|
|
<a class="nav-link " href="index.html">Home</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">CLI</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/ImageMagick/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>
|
|
<form class="d-flex form-inline" action="../www/search.html">
|
|
<input class="form-control me-2" type="text" name="q" placeholder="Search" aria-label="Search">
|
|
<button class="btn btn-outline-success" type="submit" name="sa">Search</button>
|
|
</form>
|
|
</div>
|
|
</div>
|
|
</nav>
|
|
|
|
<div class="container">
|
|
<script async="async" src="http://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>
|
|
|
|
<p>ImageMagick supports the Jzazbc colorspace, for applications that require wide color gamut and high dynamic range.</p>
|
|
|
|
<h2><a class="anchor" id="enable"></a>Enabling HDRI in ImageMagick</h2>
|
|
|
|
<p>By default, image pixels in ImageMagick version 7 are stored in a floating-point representation that range from 0 to the quantum depth, which is typically 16-bits (Q16). With HDRI enabled, the pixels 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 disable the HDRI version of ImageMagick, use this Unix/Linux command:</p>
|
|
|
|
<pre class="highlight"><code>./configure --disable-hdri
|
|
</code></pre>
|
|
|
|
<p>Under Windows, follow the instructions (straightforward for a non-programmer) in a one hour process to build and configure your own executables: <a href="install-source.html">Install from Windows Source</a>.</p>
|
|
|
|
<p>To verify HDRI is properly configured, look for "HDRI" as a feature:</p>
|
|
|
|
<pre class="highlight"><code>magick identify -version
|
|
Features: HDRI
|
|
</code></pre>
|
|
</div>
|
|
</div>
|
|
</main><!-- /.container -->
|
|
<footer class="magick-footer">
|
|
<div class="container-fluid">
|
|
<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="cite.html">Cite</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/imagemagick" 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>
|
|
</div>
|
|
</footer>
|
|
|
|
<!-- Javascript assets -->
|
|
<script src="assets/magick.js" ></script>
|
|
</body>
|
|
</html>
|
|
<!-- Magick Cache 13th February 2021 12:41 --> |