英文:
Tesseract failed loading language (Tess4j / Java / Netbeans)
问题
我目前正在处理一个程序，该程序应使用OpenCV和Tessj4在图像中检测字母和数字。为此，我从https://github.com/UB-Mannheim/tesseract/wiki下载并安装了Tesseract（版本5.0.0 alpha），从http://tess4j.sourceforge.net下载了Tess4j API（版本3.4.8），并将.jar文件（tess4j-3.4.8.jar + lib文件夹中的所有.jar文件）添加到了我的项目中。
此外，我将tesseract目录（C:/Program Files/Tesseract-OCR）添加到系统路径，并将TESSDATA_PREFIX与值（C:/Program Files/Tesseract-OCR/tessdata）添加到我的环境变量中。
然而，当我尝试运行以下这4行简单的代码时，我遇到了以下错误：
Tesseract tesseract = new Tesseract();
tesseract.setDatapath("C:/Program Files/Tesseract-OCR/tessdata");
tesseract.setLanguage("eng");
System.out.println(tesseract.doOCR(new File("screen.png")));
错误消息：
Failed loading language 'eng'
Tesseract couldn't load any languages!
Exception in thread "main" java.lang.Error: Invalid memory access
at com.sun.jna.Native.invokePointer(Native Method)
at com.sun.jna.Function.invokePointer(Function.java:470)
...
但是，当我使用控制台运行tesseract程序，然后读取创建的文件内容时，一切正常运行。
Process p = Runtime.getRuntime().exec("cmd /c tesseract screen.png text -l eng");
while (p.isAlive())
Thread.sleep(5);
BufferedReader reader = new BufferedReader(new FileReader(new File("text.txt")));
StringBuilder stringBuilder = new StringBuilder();
String line;
while ((line = reader.readLine()) != null)
stringBuilder.append(line).append("\n");
reader.close();
System.out.println(stringBuilder.toString().trim());
有人知道如何解决这个问题吗？
谢谢，Ypselon。
英文:
I'm currently working on a program which should detect letters and numbers in an image using OpenCV and Tessj4. For that I downloaded and installed Tesseract (Version 5.0.0 alpha) from https://github.com/UB-Mannheim/tesseract/wiki, downloaded the Tess4j API (Version 3.4.8) from http://tess4j.sourceforge.net and added the .jar files (tess4j-3.4.8.jar + all the .jar files inside the lib folder) to my project.
Furthermore I included the tesseract directory (C:/Program Files/Tesseract-OCR) to the systems path and added TESSDATA_PREFIX with the value (C:/Program Files/Tesseract-OCR/tessdata) to my environment variables.
However, when I try to run this 4 simple lines of code, I get the following error:
Tesseract tesseract = new Tesseract();
tesseract.setDatapath("C:/Program Files/Tesseract-OCR/tessdata");
tesseract.setLanguage("eng");
System.out.println(tesseract.doOCR(new File("screen.png")));
Failed loading language 'eng'
Tesseract couldn't load any languages!
Exception in thread "main" java.lang.Error: Invalid memory access
at com.sun.jna.Native.invokePointer(Native Method)
at com.sun.jna.Function.invokePointer(Function.java:470)
at com.sun.jna.Function.invoke(Function.java:404)
at com.sun.jna.Function.invoke(Function.java:315)
at com.sun.jna.Library$Handler.invoke(Library.java:212)
at com.sun.proxy.$Proxy0.TessBaseAPIGetUTF8Text(Unknown Source)
at net.sourceforge.tess4j.Tesseract.getOCRText(Unknown Source)
at net.sourceforge.tess4j.Tesseract.doOCR(Unknown Source)
at net.sourceforge.tess4j.Tesseract.doOCR(Unknown Source)
at net.sourceforge.tess4j.Tesseract.doOCR(Unknown Source)
at app.Main.main(Main.java:41)
But when I use the console to run the tesseract program and then reading the content of the file that is created, all works properly.
Process p = Runtime.getRuntime().exec("cmd /c tesseract screen.png text -l eng");
while(p.isAlive())
Thread.sleep(5);
BufferedReader reader = new BufferedReader(new FileReader(new File("text.txt")));
StringBuilder stringBuilder = new StringBuilder();
String line;
while((line = reader.readLine()) != null)
stringBuilder.append(line).append("\n");
reader.close();
System.out.println(stringBuilder.toString().trim());
Does anyone know how to fix this issue?
<br>Thanks, Ypselon.
答案1
得分: 2
好的，我发现由于某种原因，我的语言文件损坏了。<br>
我只是在“C:\Program Files\Tesseract-OCR\tessdata”目录中替换了“eng.traineddata”文件。
<br><br>现在一切正常工作。
英文:
Okay I found out that for some reason my language file got corrupted.<br>
I simply replaced the "eng.traineddata" file inside the "C:\Program Files\Tesseract-OCR\tessdata" directory.
<br><br>Now all is working properly.
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