JAVA OCR

【核心代码】

package com.ocr;

 

import java.io.BufferedReader;
import java.util.*;
import java.io.*;
 

 

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.List;

 

import org.jdesktop.swingx.util.OS;

 

public class OCR {

    private final String LANG_OPTION = "-l";

    private final String EOL = System.getProperty("line.separator");

    private String tessPath = new File("Tesseract-OCR").getAbsolutePath();
    

    //private String tessPath="C:\\Program Files (x86)\\Tesseract-OCR\\";

    public String recognizeText(File imageFile, String imageFormat) throws Exception {

    	 System.out.println("in OCR.java  recognizeText 47 row tessPath=" tessPath);
    	File tempImage = ImageIOHelper.createImage(imageFile, imageFormat);

       File outputFile = new File(imageFile.getParentFile(), "output");

       StringBuffer strB = new StringBuffer();

       List<String> cmd = new ArrayList<String>();

       if (OS.isWindowsXP()) {

           cmd.add(tessPath   "\\tesseract");

           //cmd.add(tessPath   "\\Tesseract-OCR");

       } else if (OS.isLinux()) {

           cmd.add("tesseract");

       } else {

           //cmd.add(tessPath   "\\Tesseract-OCR");

           cmd.add(tessPath   "\\tesseract");

       }

           cmd.add("");  

            cmd.add(outputFile.getName());  

            cmd.add(LANG_OPTION);  

            cmd.add("chi_sim");

            cmd.add("eng");  

 

       ProcessBuilder pb = new ProcessBuilder();

       pb.directory(imageFile.getParentFile());

 

       cmd.set(1, tempImage.getName());

       pb.command(cmd);

       pb.redirectErrorStream(true);

       Process process = pb.start();

       //tesseract.exe 1.jpg 1 -l chi_sim

       int w = process.waitFor();

 

       // delete temp working files

       tempImage.delete();

 

       if (w == 0) {

           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.";

           }

           tempImage.delete();

           throw new RuntimeException(msg);

       }

       new File(outputFile.getAbsolutePath()   ".txt").delete();

       return strB.toString();

    }

}