如何获取需要在tessbase.init("directory"，"eng")中使用的目录?

问题描述

所以我试图弄清楚如何使用TessBase，并且在baseApi.init(dataPath, "eng")处出现错误.我得到的错误是:directory must contain tessdata.我不知道如何获取包含tessdata的目录.这是包含eng.traineddata的目录的图像.这是我的代码:

So I am trying to figure out how to use TessBase, and I get an error at baseApi.init(dataPath, "eng"). The error I get is : directory must contain tessdata. I can't figure out how to get the directory that contains tessdata. This is an image of the directory that contains eng.traineddata. This is my code:

    Bundle extras = data.getExtras();
    Bitmap photoBitmap = (Bitmap) extras.get("data");
    TessBaseAPI baseApi = new TessBaseAPI();
    //textcaptured.setText(DATA_PATH.toString());/*
    String dataPath = Environment.getExternalStorageDirectory().toString() + "/Android/data/" + getApplicationContext().getPackageName() +  "/";
    textcaptured.setText(dataPath);
    File tessdata = new File(dataPath);
    if (!tessdata.exists() || !tessdata.isDirectory()) {
        throw new IllegalArgumentException("Data path must contain subfolder tessdata!");
    }
    baseApi.init(dataPath, "eng");
    baseApi.setImage(photoBitmap);
    String recognizedText = baseApi.getUTF8Text(); // Log or otherwise display this string...
    baseApi.end();
    textcaptured.setText(recognizedText);

推荐答案

我推荐的最简单方式是自己在sdcard中创建一个文件夹，并在其中包含tessdata子目录的目录中带有eng.tessdata的目录，如下所示:

The easiest way that I recommend is to make a folder in your sdcard by yourself and put a directory with subdirectory tessdata with eng.tessdata in it the structure shown here:

+SdCardOfPhone
--+YourAppName
----+tessdata
------eng.tessdata

现在您可以通过以下方式指向该目录

now you can point to that directory by

    String datapath = Environment.getExternalStorageDirectory() + "/YourAppName/";        
    TessBaseAPI tessBaseAPI = new TessBaseAPI();        
    tessBaseAPI.init(datapath, "eng");

您还必须在AndroidManifest.xml文件中包含以下内容

you also have to have the following in your AndroidManifest.xml file

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

出于测试目的，我不建议将eng.tessdata捆绑到项目中，因为它会增加构建时间和.apk文件的大小(> 17mb).

For testing purposes I don't recommend bundling your eng.tessdata inside the project it increases the build time and the size of your .apk file(>17mb).

将eng.tessdata捆绑到项目内部的过程非常复杂，涉及到您自己创建一个新目录，然后在运行时将捆绑的数据复制到该目录中.

The process of bundling eng.tessdata inside the project is quite involved and involves making a new directory by yourself and copying the bundled data to that directory in runtime.

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