如何在Android中使用OCR從圖像中讀取文本

0

檢出您是否正在從圖庫中選擇正確的圖像路徑。

我自己也嘗試這個演示及其對我工作的罰款。

這裏我張貼我的代碼：

OCRServiceAPI.java

public class OCRServiceAPI { 
public final String m_serviceUrl = "http://api.ocrapiservice.com/1.0/rest/ocr"; 
private final String m_paramImage = "image"; 
private final String m_paramLanguage = "language"; 
private final String m_paramApiKey = "apikey"; 
private String m_apiKey, m_responseText; 
private int m_responseCode; 
public OCRServiceAPI(final String p_apiKey) { 
    this.m_apiKey = p_apiKey; 
} 
/* 
* Convert image to text. 
* 
* @param language The image text language. 
* 
* @param filePath The image absolute file path. 
* 
* @return true if everything went okay and false if there is an error with 
* sending and receiving data. 
*/ 
public boolean convertToText(final String p_language, 
     final String p_filePath) { 
    try { 
     sendImage(p_language, p_filePath); 
     return true; 
    } catch (ClientProtocolException e) { 
     e.printStackTrace(); 
     return false; 
    } catch (IOException e) { 
     e.printStackTrace(); 
     return false; 
    } 
} 
/* 
* Send image to OCR service and read response. 
* 
* @param language The image text language. 
* 
* @param filePath The image absolute file path. 
*/ 
private void sendImage(final String p_language, final String p_filePath) 
     throws ClientProtocolException, IOException { 
    final HttpClient m_httpclient = new DefaultHttpClient(); 
    final HttpPost m_httppost = new HttpPost(m_serviceUrl); 
    final FileBody m_image = new FileBody(new File(p_filePath)); 
    final MultipartEntity m_reqEntity = new MultipartEntity(); 
    m_reqEntity.addPart(m_paramImage, m_image); 
    m_reqEntity.addPart(m_paramLanguage, new StringBody(p_language)); 
    m_reqEntity.addPart(m_paramApiKey, new StringBody(getApiKey())); 
    m_httppost.setEntity(m_reqEntity); 
    final HttpResponse m_response = m_httpclient.execute(m_httppost); 
    final HttpEntity m_resEntity = m_response.getEntity(); 
    final StringBuilder m_sb = new StringBuilder(); 
    if (m_resEntity != null) { 
     final InputStream m_stream = m_resEntity.getContent(); 
     byte m_bytes[] = new byte[4096]; 
     int m_numBytes; 
     while ((m_numBytes = m_stream.read(m_bytes)) != -1) { 
      if (m_numBytes != 0) { 
       m_sb.append(new String(m_bytes, 0, m_numBytes)); 
      } 
     } 
    } 
    setResponseCode(m_response.getStatusLine().getStatusCode()); 
    setResponseText(m_sb.toString()); 
} 
public int getResponseCode() { 
    return m_responseCode; 
} 
public void setResponseCode(int p_responseCode) { 
    this.m_responseCode = p_responseCode; 
} 
public String getResponseText() { 
    return m_responseText; 
} 
public void setResponseText(String p_responseText) { 
    this.m_responseText = p_responseText; 
} 
public String getApiKey() { 
    return m_apiKey; 
} 
public void setApiKey(String p_apiKey) { 
    this.m_apiKey = p_apiKey; 
} }

SampleActivity.java

public class SampleActivity extends Activity implements OnClickListener { 
private final int RESPONSE_OK = 200; 
private final int IMAGE_PICKER_REQUEST = 1; 
private TextView m_tvPicNameText; 
private EditText m_etLangCodeField, m_etApiKeyFiled; 
private String m_apiKey; // T7GNRh7VmH 
private String m_langCode; // en 
private String m_fileName; 
@Override 
public void onCreate(Bundle p_savedInstanceState) { 
    super.onCreate(p_savedInstanceState); 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
      WindowManager.LayoutParams.FLAG_FULLSCREEN); 
    setContentView(R.layout.main); 
    m_tvPicNameText = (TextView) findViewById(R.id.imageName); 
    m_etLangCodeField = (EditText) findViewById(R.id.lanuageCode); 
    m_etApiKeyFiled = (EditText) findViewById(R.id.apiKey); 
    m_etApiKeyFiled.setText("T7GNRh7VmH"); 
    final Button m_btnPickImage = (Button) findViewById(R.id.picImagebutton); 
    m_btnPickImage.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
      // Starting image picker activity 
      startActivityForResult(
        new Intent(
          Intent.ACTION_PICK, 
          android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI), 
        IMAGE_PICKER_REQUEST); 
     } 
    }); 
    final Button m_btnConvertText = (Button) findViewById(R.id.convert); 
    m_btnConvertText.setOnClickListener(this); 
} 
public void onClick(View p_v) { 
    m_apiKey = m_etApiKeyFiled.getText().toString(); 
    m_langCode = m_etLangCodeField.getText().toString(); 
    // Checking are all fields set 
    if (m_fileName != null && !m_apiKey.equals("") 
      && !m_langCode.equals("")) { 
     final ProgressDialog m_prgDialog = ProgressDialog.show(
       SampleActivity.this, "Loading ...", "Converting to text.", 
       true, false); 
     final Thread m_thread = new Thread(new Runnable() { 
      public void run() { 
       final OCRServiceAPI m_apiClient = new OCRServiceAPI(
         m_apiKey); 
       m_apiClient.convertToText(m_langCode, m_fileName); 
       // Doing UI related code in UI thread 
       runOnUiThread(new Runnable() { 
        public void run() { 
         m_prgDialog.dismiss(); 
         // Showing response dialog 
         final AlertDialog.Builder m_alert = new AlertDialog.Builder(
           SampleActivity.this); 
         m_alert.setMessage(m_apiClient.getResponseText()); 
         m_alert.setPositiveButton("OK", 
           new DialogInterface.OnClickListener() { 
            public void onClick(
              DialogInterface p_dialog, 
              int p_id) { 
            } 
           }); 
         // Setting dialog title related from response code 
         if (m_apiClient.getResponseCode() == RESPONSE_OK) { 
          m_alert.setTitle("Success"); 
         } else { 
          m_alert.setTitle("Faild"); 
         } 
         m_alert.show(); 
        } 
       }); 
      } 
     }); 
     m_thread.start(); 
    } else { 
     Toast.makeText(SampleActivity.this, "All data are required.", 
       Toast.LENGTH_SHORT).show(); 
    } 
} 
@Override 
protected void onActivityResult(int p_requestCode, int p_resultCode, 
     Intent p_data) { 
    super.onActivityResult(p_requestCode, p_resultCode, p_data); 
    if (p_requestCode == IMAGE_PICKER_REQUEST && p_resultCode == RESULT_OK) { 
     m_fileName = getRealPathFromURI(p_data.getData()); 
     m_tvPicNameText.setText("Selected: en" 
       + getStringNameFromRealPath(m_fileName)); 
    } 
} 
/* 
* Returns image real path. 
*/ 
private String getRealPathFromURI(final Uri p_contentUri) { 
    final String[] m_proj = { MediaStore.Images.Media.DATA }; 
    final Cursor m_cursor = managedQuery(p_contentUri, m_proj, null, null, 
      null); 
    int m_columnIndex = m_cursor 
      .getColumnIndexOrThrow(MediaStore.Images.Media.DATA); 
    m_cursor.moveToFirst(); 
    return m_cursor.getString(m_columnIndex); 
} 
/* 
* Cuts selected file name from real path to show in screen. 
*/ 
private String getStringNameFromRealPath(final String bucketName) { 
    return bucketName.lastIndexOf('/') > 0 ? bucketName 
      .substring(bucketName.lastIndexOf('/') + 1) : bucketName; 
} }

來源

2013-01-02 12:13:10 GrIsHu

+0

香港專業教育學院給予相同的/mnt/sdcard/_ExternalSD/DCIM/100LGDSC/xxxx.jpg。這樣對嗎？ – sanjay

+0

可以在這裏發佈您的工作代碼，以便我可以糾正我的問題？ – sanjay

2

無法猜測你上面的錯誤，但我有這樣做在黑莓任務通過使用第三方應用OCR的ABBYY產品。PHP服務器。

在我長期的R & D我也曾在Github_Abbyy下面的鏈接工作。要使用此代碼，您應該在此處創建一個免費帳戶：ocrsdk.com

來源

2013-01-02 12:13:46

0

並非所有的Apache軟件包在Android中默認都可用，因此您必須從Apache存儲庫下載它們並自行包含這些軟件包。請參閱問題Android libraries not found以及答案中提供的鏈接。

編輯：具體地說org.apache.http.entity的子包不包括在內，僅實體包本身。

在通過他們已經放置的mime包在一個罐子in the lib folder的OCR API給出的示例項目。

來源

2013-01-02 12:19:25 Sardtok

+0

我已經很好地引用了httpmine.jar文件，但未能成功 – sanjay

+0

我認爲Eclipse（您使用Eclipse？）會自動將庫放入APK中。一種選擇是使用不同的類加載器，並在需要它們之前動態加載這些類（但我不明白爲什麼這是必需的）。請參閱：[在Android上從JAR中加載類]（http://stackoverflow.com/questions/11929850/loading-classes-from-jar-on-android） – Sardtok

+0

[如何在Eclipse項目中包含jar]（http： //stackoverflow.com/a/11824038/1935704） – Sardtok

如何在Android中使用OCR從圖像中讀取文本

回答

相關問題