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<meta property="og:description" content="一.什么是OCROCR （Optical Character Recognition，光学字符识别）是指电子设备（例如扫描仪或数码相机）检查纸上打印的字符，通过检测暗、亮的模式确定其形状，然后用字符识别方法将形状翻译成计算机文字的过程 方案 说明 百度OCR 收费 Tesseract-OCR Google维护的开源OCR引擎，支持Java，Python等语言调用 Tess4J">
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<table>
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<thead>
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<tr>
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<th><strong>方案</strong></th>
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<th><strong>说明</strong></th>
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</tr>
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</thead>
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<tbody><tr>
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<td>百度OCR</td>
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<td>收费</td>
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</tr>
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<tr>
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<td>Tesseract-OCR</td>
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<td>Google维护的开源OCR引擎，支持Java，Python等语言调用</td>
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</tr>
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<tr>
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<td>Tess4J</td>
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<td>封装了Tesseract-OCR ，支持Java调用</td>
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</tr>
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</tbody></table>
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<h2 id="二-Tesseract-OCR-的特点"><a href="#二-Tesseract-OCR-的特点" class="headerlink" title="二.Tesseract-OCR 的特点"></a>二.Tesseract-OCR 的特点</h2><ul>
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<li><p>Tesseract支持UTF-8编码格式，并且可以“开箱即用”地识别100多种语言</p>
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</li>
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<li><p>Tesseract支持多种输出格式：纯文本，hOCR（HTML），PDF等</p>
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</li>
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<li><p>官方建议，为了获得更好的OCR结果，最好提供给高质量的图像</p>
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</li>
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<li><p>Tesseract进行识别其他语言的训练，具体的训练方式请参考官方提供的文档：<a target="_blank" rel="noopener" href="https://tesseract-ocr.github.io/tessdoc/">https://tesseract-ocr.github.io/tessdoc/</a></p>
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</li>
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</ul>
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<h2 id="三-使用案例"><a href="#三-使用案例" class="headerlink" title="三.使用案例"></a>三.使用案例</h2><h3 id="1-导入相关的依赖"><a href="#1-导入相关的依赖" class="headerlink" title="1.导入相关的依赖"></a>1.导入相关的依赖</h3><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">dependency</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">groupId</span>></span>net.sourceforge.tess4j<span class="tag"></<span class="name">groupId</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">artifactId</span>></span>tess4j<span class="tag"></<span class="name">artifactId</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">version</span>></span>4.1.1<span class="tag"></<span class="name">version</span>></span></span><br><span class="line"><span class="tag"></<span class="name">dependency</span>></span></span><br></pre></td></tr></table></figure>
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<h3 id="2-导入中文字体库"><a href="#2-导入中文字体库" class="headerlink" title="2.导入中文字体库"></a>2.导入中文字体库</h3><p>地址: <a target="_blank" rel="noopener" href="https://wwvc.lanzouj.com/iuPhc1h7j46f">https://wwvc.lanzouj.com/iuPhc1h7j46f</a></p>
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<blockquote>
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<p>chi_sim.traineddata</p>
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</blockquote>
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<p><img src="/pictures/image-20231208212352206.png" alt="image-20231208212352206"></p>
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<h3 id="3-编写测试类进行测试"><a href="#3-编写测试类进行测试" class="headerlink" title="3.编写测试类进行测试"></a>3.编写测试类进行测试</h3><p><strong>待识别的图片</strong></p>
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<p><img src="/pictures/image-20231208205943762.png" alt="image-20231208205943762"></p>
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<p><strong>测试程序</strong></p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.heima;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> net.sourceforge.tess4j.Tesseract;</span><br><span class="line"><span class="keyword">import</span> net.sourceforge.tess4j.TesseractException;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.io.File;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span> Jason Gong</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@version</span> 1.0</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Date</span> 2023/12/8</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Description</span></span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">Main</span> {</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 识别图片中的文字</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@param</span> args</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title function_">main</span><span class="params">(String[] args)</span> <span class="keyword">throws</span> TesseractException {</span><br><span class="line"> <span class="comment">//创建实例</span></span><br><span class="line"> <span class="type">Tesseract</span> <span class="variable">tesseract</span> <span class="operator">=</span> <span class="keyword">new</span> <span class="title class_">Tesseract</span>();</span><br><span class="line"> <span class="comment">//设置字体库的路径</span></span><br><span class="line"> tesseract.setDatapath(<span class="string">"C:\\Gong\\data\\tess4j"</span>);</span><br><span class="line"> <span class="comment">//设置语言</span></span><br><span class="line"> <span class="comment">//字体库为chi_sim.traineddata,语言取.前面的内容,即文件名</span></span><br><span class="line"> <span class="comment">//简体中文</span></span><br><span class="line"> tesseract.setLanguage(<span class="string">"chi_sim"</span>);</span><br><span class="line"> <span class="comment">//识别图片</span></span><br><span class="line"> <span class="type">String</span> <span class="variable">ocr</span> <span class="operator">=</span> tesseract.doOCR(<span class="keyword">new</span> <span class="title class_">File</span>(<span class="string">"C:\\Gong\\data\\tess4j\\tess4j.png"</span>));</span><br><span class="line"> <span class="comment">//打印识别的结果</span></span><br><span class="line"> <span class="comment">//打印的时候可以去除回车和tab空格</span></span><br><span class="line"> <span class="comment">//System.out.println(ocr.replaceAll("\\n|\\r","-"));</span></span><br><span class="line"> System.out.println(ocr);</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
|
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<p><strong>识别的结果</strong></p>
|
||
<p><img src="/pictures/image-20231208211200859.png" alt="image-20231208211200859"></p>
|
||
<h2 id="四-封装成工具类使用"><a href="#四-封装成工具类使用" class="headerlink" title="四.封装成工具类使用"></a>四.封装成工具类使用</h2><h3 id="1-创建工具类"><a href="#1-创建工具类" class="headerlink" title="1.创建工具类"></a>1.创建工具类</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.heima.common.tess4j;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> lombok.Getter;</span><br><span class="line"><span class="keyword">import</span> lombok.Setter;</span><br><span class="line"><span class="keyword">import</span> net.sourceforge.tess4j.ITesseract;</span><br><span class="line"><span class="keyword">import</span> net.sourceforge.tess4j.Tesseract;</span><br><span class="line"><span class="keyword">import</span> net.sourceforge.tess4j.TesseractException;</span><br><span class="line"><span class="keyword">import</span> org.springframework.boot.context.properties.ConfigurationProperties;</span><br><span class="line"><span class="keyword">import</span> org.springframework.stereotype.Component;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.awt.image.BufferedImage;</span><br><span class="line"></span><br><span class="line"><span class="meta">@Getter</span></span><br><span class="line"><span class="meta">@Setter</span></span><br><span class="line"><span class="meta">@Component</span></span><br><span class="line"><span class="meta">@ConfigurationProperties(prefix = "tess4j")</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">Tess4jClient</span> {</span><br><span class="line"></span><br><span class="line"> <span class="keyword">private</span> String dataPath;</span><br><span class="line"> <span class="keyword">private</span> String language;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">public</span> String <span class="title function_">doOCR</span><span class="params">(BufferedImage image)</span> <span class="keyword">throws</span> TesseractException {</span><br><span class="line"> <span class="comment">//创建Tesseract对象</span></span><br><span class="line"> <span class="type">ITesseract</span> <span class="variable">tesseract</span> <span class="operator">=</span> <span class="keyword">new</span> <span class="title class_">Tesseract</span>();</span><br><span class="line"> <span class="comment">//设置字体库路径</span></span><br><span class="line"> tesseract.setDatapath(dataPath);</span><br><span class="line"> <span class="comment">//中文识别</span></span><br><span class="line"> tesseract.setLanguage(language);</span><br><span class="line"> <span class="comment">//执行ocr识别</span></span><br><span class="line"> <span class="type">String</span> <span class="variable">result</span> <span class="operator">=</span> tesseract.doOCR(image);</span><br><span class="line"> <span class="comment">//替换回车和tal键 使结果为一行</span></span><br><span class="line"> result = result.replaceAll(<span class="string">"\\r|\\n"</span>, <span class="string">"-"</span>).replaceAll(<span class="string">" "</span>, <span class="string">""</span>);</span><br><span class="line"> <span class="keyword">return</span> result;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure>
|
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<h3 id="2-配置文件中添加配置"><a href="#2-配置文件中添加配置" class="headerlink" title="2.配置文件中添加配置"></a>2.配置文件中添加配置</h3><figure class="highlight yaml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="attr">tess4j:</span></span><br><span class="line"> <span class="attr">data-path:</span> <span class="string">C:\workspace\tessdata</span> <span class="comment"># 字体库的路径</span></span><br><span class="line"> <span class="attr">language:</span> <span class="string">chi_sim</span> <span class="comment"># 识别的字体d</span></span><br></pre></td></tr></table></figure>
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</article><div class="tag_share"><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/OCR/">OCR</a></div><div class="post_share"><div class="social-share" data-image="/img/2.png" data-sites="wechat,weibo,qq"></div><link rel="stylesheet" href="/cdn/css/share.min.css" media="print" onload="this.media='all'"><script src="/cdn/js/social-share.min.js" defer></script></div></div><div class="post-reward"><div class="reward-button"><i class="fas fa-qrcode"></i> 打赏</div><div class="reward-main"><ul class="reward-all"><li class="reward-item"><a href="/img/wechat.jpg" target="_blank"><img class="post-qr-code-img" src="/img/wechat.jpg" alt="微信"/></a><div class="post-qr-code-desc">微信</div></li><li class="reward-item"><a href="/img/alipay.jpg" target="_blank"><img class="post-qr-code-img" src="/img/alipay.jpg" alt="支付宝"/></a><div class="post-qr-code-desc">支付宝</div></li></ul></div></div><br/><div id="post-comment"><div class="comment-head"><div class="comment-headline"><i 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class="toc-item toc-level-2"><a class="toc-link" href="#%E4%B8%80-%E4%BB%80%E4%B9%88%E6%98%AFOCR"><span class="toc-text">一.什么是OCR</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E4%BA%8C-Tesseract-OCR-%E7%9A%84%E7%89%B9%E7%82%B9"><span class="toc-text">二.Tesseract-OCR 的特点</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E4%B8%89-%E4%BD%BF%E7%94%A8%E6%A1%88%E4%BE%8B"><span class="toc-text">三.使用案例</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#1-%E5%AF%BC%E5%85%A5%E7%9B%B8%E5%85%B3%E7%9A%84%E4%BE%9D%E8%B5%96"><span class="toc-text">1.导入相关的依赖</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#2-%E5%AF%BC%E5%85%A5%E4%B8%AD%E6%96%87%E5%AD%97%E4%BD%93%E5%BA%93"><span class="toc-text">2.导入中文字体库</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#3-%E7%BC%96%E5%86%99%E6%B5%8B%E8%AF%95%E7%B1%BB%E8%BF%9B%E8%A1%8C%E6%B5%8B%E8%AF%95"><span class="toc-text">3.编写测试类进行测试</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9B%9B-%E5%B0%81%E8%A3%85%E6%88%90%E5%B7%A5%E5%85%B7%E7%B1%BB%E4%BD%BF%E7%94%A8"><span class="toc-text">四.封装成工具类使用</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#1-%E5%88%9B%E5%BB%BA%E5%B7%A5%E5%85%B7%E7%B1%BB"><span class="toc-text">1.创建工具类</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#2-%E9%85%8D%E7%BD%AE%E6%96%87%E4%BB%B6%E4%B8%AD%E6%B7%BB%E5%8A%A0%E9%85%8D%E7%BD%AE"><span class="toc-text">2.配置文件中添加配置</span></a></li></ol></li></ol></div></div><div class="card-widget card-recent-post"><div class="item-headline"><i class="fas fa-history"></i><span>最近更新</span></div><div class="aside-list"><div class="aside-list-item"><a class="thumbnail" href="/posts/8957.html" title="Linux从入门到进阶"><img src="/img/8.png" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="Linux从入门到进阶"/></a><div 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