Windows下Java调用OCR进行图片识别

package ocr;

import java.awt.image.bufferedimage;

import java.io.file;

import java.io.ioexception;

import java.util.iterator;

import java.util.locale;

import javax.imageio.iioimage;

import javax.imageio.imageio;

import javax.imageio.imagereader;

import javax.imageio.imagewriteparam;

import javax.imageio.imagewriter;

import javax.imageio.metadata.iiometadata;

import javax.imageio.stream.imageinputstream;

import javax.imageio.stream.imageoutputstream;

import com.sun.media.imageio.plugins.tiff.tiffimagewriteparam;

public class imageiohelper {

  /**

  * 图片文件转换为tif格式

  * @param imagefile 文件路径

  * @param imageformat 文件扩展名

  * @return

  */

  public static file createimage(file imagefile, string imageformat) {

  file tempfile = null ;

  try {

   iterator<imagereader> readers = imageio.getimagereadersbyformatname(imageformat);

   imagereader reader = readers.next();

   imageinputstream iis = imageio.createimageinputstream(imagefile);

   reader.setinput(iis);

   //read the stream metadata

   iiometadata streammetadata = reader.getstreammetadata();

   //set up the writeparam

   tiffimagewriteparam tiffwriteparam = new tiffimagewriteparam(locale.chinese);

   tiffwriteparam.setcompressionmode(imagewriteparam.mode_disabled);

   //get tif writer and set output to file

   iterator<imagewriter> writers = imageio.getimagewritersbyformatname( "tiff" );

   imagewriter writer = writers.next();

   bufferedimage bi = reader.read( 0 );

   iioimage image = new iioimage(bi, null ,reader.getimagemetadata( 0 ));

   tempfile = tempimagefile(imagefile);

   imageoutputstream ios = imageio.createimageoutputstream(tempfile);

   writer.setoutput(ios);

   writer.write(streammetadata, image, tiffwriteparam);

   ios.close();

   writer.dispose();

   reader.dispose();

  } catch (ioexception e) {

   e.printstacktrace();

  }

  return tempfile;

  }

  private static file tempimagefile(file imagefile) {

  string path = imagefile.getpath();

  stringbuffer strb = new stringbuffer(path);

  strb.insert(path.lastindexof( '.' ), 0 );

  return new file(strb.tostring().replacefirst( "(?<=//.)(//w+)$" , "tif" ));

  }

}

package ocr;

import java.io.bufferedreader;

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" ; //英文字母小写l，并非数字1

  private final string eol = system.getproperty( "line.separator" );

  private string tesspath = "c://program files//tesseract-ocr" ;

  //private string tesspath = new file("tesseract").getabsolutepath();

  public string recognizetext(file imagefile,string imageformat) throws exception{

  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" );

  } else if (os.islinux()){

   cmd.add( "tesseract" );

  } else {

   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测试数据mand(cmd);

  pb.redirecterrorstream( true );

  process process = pb.start();

  //tesseract.exe 1.jpg 1 -l chi_sim

  int w = process.waitfor();

  //删除临时正在工作文件

  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 recongnize 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();

  }

}

package ocr;

import java.io.file;

import java.io.ioexception;

public class testocr {

  /**

  * @param args

  */

  public static void main(string[] args) {

  //输入图片地址

  string path = "d://test//test.bmp" ; 

     try { 

       string valcode = new ocr().recognizetext( new file(path), "bmp" ); 

       system.out.println(valcode); 

     } catch (ioexception e) { 

       e.printstacktrace(); 

     } catch (exception e) {

   e.printstacktrace();

  } 

  }

}