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<script type="application/ld+json">{"@context":"https://schema.org","@type":"Article","headline":"JPEG算法解密（五）","image":[""],"dateModified":"2025-08-31T08:33:30.000Z","author":[{"@type":"Person","name":"JinChao","url":"https://thecodeway.com"}]}</script><meta property="og:url" content="https://thejinchao.github.io/blog/2025/02/JPEG005.html"><meta property="og:site_name" content="我的博客和笔记"><meta property="og:title" content="JPEG算法解密（五）"><meta property="og:description" content="JPEG算法解密（五） 最后，我提供给大家一个简易的jpeg压缩算法的代码，这份代码用C++编写，以开源方式提供，放在了github上，可以到下面这个网址下载 http://github.com/thejinchao/jpeg_encoder 使用方法很简单，像下面这样就可以了 这份代码只是为了配合这个系列的文章，所以没有考虑优化，如果你想在实际工程中..."><meta property="og:type" content="article"><meta property="og:locale" content="zh-CN"><meta property="og:updated_time" content="2025-08-31T08:33:30.000Z"><meta property="article:modified_time" content="2025-08-31T08:33:30.000Z"><title>JPEG算法解密（五） | 我的博客和笔记</title><meta name="description" content="JPEG算法解密（五） 最后，我提供给大家一个简易的jpeg压缩算法的代码，这份代码用C++编写，以开源方式提供，放在了github上，可以到下面这个网址下载 http://github.com/thejinchao/jpeg_encoder 使用方法很简单，像下面这样就可以了 这份代码只是为了配合这个系列的文章，所以没有考虑优化，如果你想在实际工程中...">
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class="vp-sidebar-title">编程语言</span><span class="vp-arrow end"></span></button><!----></section></li></ul></section></li></ul><!----></aside><!--[--><main id="main-content" class="vp-page"><!--[--><!----><!----><nav class="vp-breadcrumb disable"></nav><div class="vp-page-title"><h1><!---->JPEG算法解密（五）</h1><!----><hr></div><!----><div class="" vp-content><!----><div id="markdown-content"><h1 id="jpeg算法解密-五" tabindex="-1"><a class="header-anchor" href="#jpeg算法解密-五"><span>JPEG算法解密（五）</span></a></h1><p>最后，我提供给大家一个简易的jpeg压缩算法的代码，这份代码用C++编写，以开源方式提供，放在了github上，可以到下面这个网址下载<br><a href="http://github.com/thejinchao/jpeg_encoder" target="_blank" rel="noopener noreferrer">http://github.com/thejinchao/jpeg_encoder</a><br> 使用方法很简单，像下面这样就可以了</p><div class="language-cpp" data-highlighter="shiki" data-ext="cpp" style="--shiki-light:#383A42;--shiki-dark:#abb2bf;--shiki-light-bg:#FAFAFA;--shiki-dark-bg:#282c34;"><pre class="shiki shiki-themes one-light one-dark-pro vp-code"><code class="language-cpp"><span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">#include</span><span style="--shiki-light:#50A14F;--shiki-dark:#98C379;"> "jpeg_encoder.h"</span></span>
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<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> </span></span>
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<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">JpegEncoder encoder;</span></span>
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<span class="line"><span style="--shiki-light:#A0A1A7;--shiki-light-font-style:italic;--shiki-dark:#7F848E;--shiki-dark-font-style:italic;">//输入的文件必须是24bit的bmp文件，尺寸必须是8的倍数</span></span>
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<span class="line"><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">encoder</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">.</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;">readFromBMP</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(inputFileName);</span></span>
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<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> </span></span>
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<span class="line"><span style="--shiki-light:#A0A1A7;--shiki-light-font-style:italic;--shiki-dark:#7F848E;--shiki-dark-font-style:italic;">//第二个参数在1~199之间，代表文件压缩程度，数字越大，压缩后的文件体积越小</span></span>
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<span class="line"><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">encoder</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">.</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;">encodeToJPG</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(outputFileName, </span><span style="--shiki-light:#986801;--shiki-dark:#D19A66;">50</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">);</span></span></code></pre></div><p>这份代码只是为了配合这个系列的文章，所以没有考虑优化，如果你想在实际工程中使用jpeg的压缩算法，还是使用被广泛应用的libjpeg或者OpenJpeg。</p><hr><p>参考资料：<br> 【1】<a href="http://www.impulseadventure.com/photo/jpeg-huffman-coding.html" target="_blank" rel="noopener noreferrer">http://www.impulseadventure.com/photo/jpeg-huffman-coding.html</a><br> 【2】<a href="http://www.mysanco.cn/index.php?class=wenku&action=wenku_item&id=96" target="_blank" rel="noopener noreferrer">http://www.mysanco.cn/index.php?class=wenku&action=wenku_item&id=96</a><br> 【3】<a href="http://www.codingnow.com/2000/download/jpeg.txt" target="_blank" rel="noopener noreferrer">http://www.codingnow.com/2000/download/jpeg.txt</a><br> 【4】<a href="http://jingyan.baidu.com/article/cbf0e500f1ce562eaa2893f4.html" target="_blank" rel="noopener noreferrer">http://jingyan.baidu.com/article/cbf0e500f1ce562eaa2893f4.html</a><br> 【5】<a href="http://www.codeproject.com/Articles/83225/A-Simple-JPEG-Encoder-in-C" target="_blank" rel="noopener noreferrer">http://www.codeproject.com/Articles/83225/A-Simple-JPEG-Encoder-in-C</a></p></div><!----><!----><!----></div><footer class="vp-page-meta"><!----><div class="vp-meta-item git-info"><!----><!----></div></footer><nav class="vp-page-nav"><a class="route-link auto-link prev" href="/blog/2025/02/JPEG004.html" aria-label="JPEG算法解密（四）"><div class="hint"><span class="arrow start"></span>上一页</div><div class="link"><!---->JPEG算法解密（四）</div></a><!----></nav><!----><!----><!--]--></main><!--]--><footer class="vp-footer-wrapper" vp-footer><div class="vp-footer">使用 <a href="https://theme-hope.vuejs.press/zh/" target="_blank">VuePress Theme Hope</a> 主题 | <a href="https://beian.miit.gov.cn/" target="_blank">京ICP备16018986号-1</a></div><!----></footer></div><!--]--><!--]--><!--[--><!----><!--[--><!--]--><!--]--><!--]--></div>
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