Linux install Tesseract-OCR java run

Preparations for installing Tesseract-OCR :
Compilation environment: gcc gcc-c++ make (this environment is generally available on machines and can be ignored)  
1
yum install gcc gcc-c++ make
 dependent packages: autoconf automake libtool libjpeg-devel libpng-devel libtiff-devel zlib-devel leptonica (above 1.67) 1. autoconf automake libtool libjpeg-devel libpng-devel libtiff-devel zlib-devel can be installed by yum: 1 yum install autoconf automake libtool 2 yum install libjpeg-devel libpng-devel libtiff-devel zlib- devel 2. leptonica requires source code compilation and installation  reference:  http://paramountideas.com/tesseract-ocr-30-and-leptonica-installation-centos-55-and-opensuse-113  http://www.leptonica.org/ source/README.htmlDownload  the leptonica package: http://www.leptonica.org/source/leptonica-1.68.tar.gz
 
 










 After decompression, switch to the root directory of leptonica-1.68  
1
./configure
2
make
3
make install
tesseract installation:
 After the dependencies are installed, start installing tesseract and
 download the tesseract-3.01 installation package: http://tesseract-ocr.googlecode.com/files/tesseract -3.01.tar.gz
 decompress and switch to the tesseract-3.01 root directory
 (if you encounter errors like strngs.h:1: error: stray '\357' in program during make, please tesseract-3.01/ccutil/strngs .h file is converted to ANSI encoding and saved, and then recompiled)  
1
./autogen.sh
2
./configure
3
make
4
make install
5
ldconfig
tesseract English language package installation:  
 Download tesseract-3.01 English language package: 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:
1
tesseract phototest.tif phototest -l eng
 输出:
1
Tesseract Open Source OCR Engine v3.01 with Leptonica
2
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*", "");
	}