1 2 3 4 5<!doctype html> 6<html lang="en"> 7<head> 8 <meta charset="utf-8" /> 9 <meta name="viewport" content="width=device-width, initial-scale=1" /> 10 <title>ImageMagick - High Dynamic-Range Images</title> 11 <meta name="application-name" content="ImageMagick" /> 12 <meta name="description" content="Use ImageMagick® to create, edit, compose, and convert digital images. 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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> 96 97<ul> 98 <li>render/capture floating-point color space</li> 99 <li>encompass the entire perceivable gamut (extend values outside [0,1] range)</li> 100 <li>post-process in extended color space</li> 101 <li>apply tone-mapping for specific display</li> 102</ul> 103 104<p>ImageMagick supports the Jzazbc colorspace, for applications that require wide color gamut and high dynamic range.</p> 105 106<h2><a class="anchor" id="enable"></a>Enabling HDRI in ImageMagick</h2> 107 108<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> 109 110<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> 111 112<p>To disable the HDRI version of ImageMagick, use this Unix/Linux command:</p> 113 114<pre class="highlight"><code>./configure --disable-hdri 115</code></pre> 116 117<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> 118 119<p>To verify HDRI is properly configured, look for "HDRI" as a feature:</p> 120 121<pre class="highlight"><code>magick identify -version 122Features: HDRI 123</code></pre> 124</div> 125 </div> 126 </main><!-- /.container --> 127 <footer class="magick-footer"> 128 <div class="container-fluid"> 129 <a href="security-policy.html">Security</a> • 130 <a href="news.html">News</a> 131 132 <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> 133 134 <a href="links.html">Related</a> • 135 <a href="sitemap.html">Sitemap</a> 136 <br/> 137 <a href="support.html">Sponsor</a> • 138 <a href="cite.html">Cite</a> • 139 <a href="http://pgp.mit.edu/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> • 140 <a href="https://imagemagick.org/script/contact.php">Contact Us</a> 141 <br/> 142 <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> • 143 <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> 144 <br/> 145 <small>© 1999-2021 ImageMagick Studio LLC</small> 146 </div> 147 </footer> 148 149 <!-- Javascript assets --> 150 <script src="assets/magick.js" ></script> 151 </body> 152</html> 153<!-- Magick Cache 13th February 2021 12:41 -->
