linux 安装Tesseract-OCR java运行

安装Tesseract-OCR
准备工作:
编译环境: gcc gcc-c++ make(这个环境一般机器都具备,可以忽略)  
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yum install gcc gcc-c++ make
 依赖的包: autoconf automake libtool libjpeg-devel libpng-devel libtiff-devel zlib-devel leptonica(1.67以上)
 
 
1. autoconf automake libtool libjpeg-devel libpng-devel libtiff-devel zlib-devel 可以通过yum安装:
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yum install autoconf automake libtool
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yum install libjpeg-devel libpng-devel libtiff-devel zlib-devel
2. leptonica 需要源码编译安装
 参考资料:
 http://paramountideas.com/tesseract-ocr-30-and-leptonica-installation-centos-55-and-opensuse-113
 http://www.leptonica.org/source/README.html
 下载leptonica 包: http://www.leptonica.org/source/leptonica-1.68.tar.gz
 解压后切换到leptonica-1.68 根目录  
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./configure
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make
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make install
tesseract安装:
 依赖安装完毕后开始安装tesseract
 下载tesseract-3.01 安装包: http://tesseract-ocr.googlecode.com/files/tesseract-3.01.tar.gz
 解压后切换到tesseract-3.01 根目录
 （如果在make时遇到类似strngs.h:1: error: stray '\357' in program 的错误，请将tesseract-3.01/ccutil/strngs.h 文件转为ANSI 编码保存,再重新编译）  
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./autogen.sh
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./configure
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make
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make install
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ldconfig
tesseract英文语言包安装:  
 下载tesseract-3.01 英文语言包: http://tesseract-ocr.googlecode.com/files/tesseract-ocr-3.01.eng.tar.gz
 解压后将tesseract-ocr/tessdata 下的所有文件全部拷贝到/usr/local/share/tessdata 下
安装完毕.
测试一下:
 切换到解压后的tesseract-3.01 根目录(这个目录下有一个自带的phototest.tif 可以做测试用)
 命令行:
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tesseract phototest.tif phototest -l eng
 输出:
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Tesseract Open Source OCR Engine v3.01 with Leptonica
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Page 0
 这时应该在当前目录生成一个phototest.txt 文本文件,内容就是phototest.tif 显示的文字.

 

 

--------------------------------------------以上安装完成-------------------------------------

java实现

方法：

private static String recognizeText(File imageFile){
		/**
		 * 设置输出文件的保存的文件目录
		 */
		File outputFile = new File(imageFile.getParentFile(), "output");
		StringBuffer strB = new StringBuffer();

		// 设置cmd命令行字符串形式
		List<String> cmd = new ArrayList<String>();
		cmd.add("tesseract");
		cmd.add(imageFile.getName());
		cmd.add(outputFile.getName());
		cmd.add("-l");
		cmd.add("eng");

		try {
			// 启动exe进程
			ProcessBuilder pb = new ProcessBuilder();
			pb.directory(imageFile.getParentFile());
			pb.command(cmd);
			pb.redirectErrorStream(true);
			Process process = pb.start();
			// 等待此进程完成
			int w = process.waitFor();
			if (w == 0) {// 0代表正常退出
				BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(outputFile.getAbsolutePath() + ".txt"), "UTF-8"));
				String str;
				while ((str = in.readLine()) != null) {
					strB.append(str).append(EOL);
				}
				in.close();
			} else {
				String msg;
				switch (w) {
				case 1:
					msg = "Errors accessing files. There may be spaces in your image's filename.";
					break;
				case 29:
					msg = "Cannot recognize the image or its selected region.";
					break;
				case 31:
					msg = "Unsupported image format.";
					break;
				default:
					msg = "Errors occurred.";
				}
				logger.error(msg);
			}
		} catch (Exception e) {
			logger.error(e.getMessage(), e);
		}
		new File(outputFile.getAbsolutePath() + ".txt").delete();
		return strB.toString().replaceAll("\\s*", "");
	}