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With this tool, automatic identification and verification code is no longer a problem

2022-06-29 01:10:00 【Xiaowu knock code】

Environmental preparation

1、windows Environment Download exe

http://digi.bib.uni-mannheim.de/tesseract/tesseract-ocr-setup-4.00.00dev.exe

double-click exe, All the way next complete Tesseract-OCR install Insert picture description here

2、 Configure environment variables

PATH increase D:\ProgramFiles\Tesseract-OCR

New environment variable TESSDATA_PREFIX The value is

 D:\ProgramFiles\Tesseract-OCR\tessdata

This is to add the Language Library folder to the environment variable TESSDATA_PREFIX in

CMD In the command line window, enter the following command ：

View version number

C:\Users\18611>tesseract -v 

tesseract 4.00.00alpha 

leptonica-1.74.1 

libgif 4.1.6(?) : libjpeg 8d (libjpeg-turbo 1.5.0) : libpng  1.6.20: libtiff 4.0.6 : zlib 1.2.8 :  

libwebp 0.4.3 : libopenjp2 2.1.0

View supported language packs

C:\Users\18611>tesseract --list-langs 

List of available languages (2): 

eng 

osd 



C:\Users\18611>

Command recognition picture

Identify the following picture verification code

Insert picture description here

Use tesseract The command recognizes the contents of the picture

C:\Users\18611>cd Desktop 

C:\Users\18611\Desktop>tesseract test2.png output 

Tesseract Open Source OCR Engine v4.00.00alpha with Leptonica 

C:\Users\18611\Desktop>

【 grammar 】:tesseract imagename outputbase [-l lang] [-psm pagesegmode] [configfile…]

imagename For the target image file name , Format suffix is needed ;

outputbase Is the conversion result file name ;

lang Is the language name （ stay Tesseract-OCR in tessdata The folder can be seen as eng The first language file eng.traineddata）, If not marked -l eng The default is eng.

java Automatically recognize pictures

take tesseract.exe Save command as bat file ,bat The content is ：

// Picture path D:\Tesseract-OCR\test.png Generate txt File storage path and file name result

The code implementation is as follows ：

package com.mtx.util;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStreamReader;



/** * @ClassName ReadCpacha * @Description TODO * @Author  The colours of the rainbow  rainbow QQ3130978832 * @Date-Time 2022/6/9 13:55 * @ProjectName MtxPublic * @Copyright  Beijing Code classmate Network Technology Co., Ltd  **/



public class ReadCpacha{
      



public static String readPic(){
      

        String cmd= "cmd /c start D:\\Tesseract-OCR\\tesseract.bat";  

    try {
      

         Runtime.getRuntime().exec(cmd);  

    } catch(Exception e) {
      

            e.printStackTrace();  

    }  

    try {
      

         // Thread blocking  3  Seconds to wait  tesseract.exe  Execution completed   

         Thread.sleep(3000);  

    }catch (InterruptedException e) {
      

         e.printStackTrace();  

    }  

    // perform  tesseract.exe  Generate... After identifying the picture  result.txt  Save the post identification verification code in the file   

         // Read  result.txt  Get the verification code from the file   

         // ReadTxt 

        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);  

         StringBuffer sb= new StringBuffer();  

         String text = null;  

         while((text = bufferedReader.readLine()) != null){
      

               // The string read line by line is saved to  StringBuffer  object   

                    sb.append(text);  

          }  

          return sb.toString();  

       }catch (Exception e) {
      

            e.printStackTrace();  

       }  

    }  

      return null;  

  }  

    public static void main(String[] args) {
      

        String str = readPic();// Call the encapsulated method test   

        System.out.println(str);  

    }

}



C:\Users\18611\IdeaProjects\MtxPublic>tesseract --help-psm

Page segmentation modes:  

0 Orientation and script detection (OSD) only.  

1 Automatic page segmentation with OSD.  

2 Automatic page segmentation, but no OSD, or OCR.  

3 Fully automatic page segmentation, but no OSD. (Default)  

4 Assume a single column of text of variable sizes.  

5 Assume a single uniform block of vertically aligned text.  

6 Assume a single uniform block of text.  

7 Treat the image as a single text line.  

8 Treat the image as a single word.

9 Treat the image as a single word in a circle.

10 Treat the image as a single character.

11 Sparse text. Find as much text as possible in no particular order.

12 Sparse text with OSD.

13 Raw line. Treat the image as a single text line,  bypassing hacks that are Tesseract-specific.



C:\Users\18611\IdeaProjects\MtxPublic>

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Insert picture description here

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