content: /*
   * Symphony - A modern community (forum/BBS/SNS/blog) platform written in Java.
   * Copyright (C) 2012-present, b3log.org
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <https://www.gnu.org/licenses/>.
   */
  package org.b3log.symphony.util;
  
  import org.apache.commons.io.IOUtils;
  import org.apache.commons.lang3.StringUtils;
  import org.b3log.latke.util.Execs;
  
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  
  /**
   * Tesseract-OCR utilities.
   *
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 1.0.0.3, Mar 28, 2021
   * @since 1.4.0
   */
  public final class Tesseracts {
  
      /**
       * Recognizes a single character from the specified image file path.
       *
       * @param imagePath the specified image file path
       * @return the recognized character
       */
      public static String recognizeCharacter(final String imagePath) {
          try {
              Execs.exec(new String[]{"sh", "-c", "tesseract " + imagePath + " " + imagePath + " -l chi_sim --psm 8"}, 1000 * 3);
              return StringUtils.trim(IOUtils.toString(new FileInputStream(imagePath + ".txt"), StandardCharsets.UTF_8));
          } catch (final Exception e) {
              return "";
          }
      }
  
      /**
       * Private constructor.
       */
      private Tesseracts() {
      }
  }
  