有两种解决方案，一种是采用tesseract cloud-service,这钟是把图片信息发送到云端，然后获得图片分析数据；第二种就是不用联网，本地化分析图片上信息。我就说说第二种,第一种我会在最后给大家一个链接（文章很不错）。
b.可能上面一个下载后编译有些人会遇到一些问题，比如找不到jgep库，编译不成功。所以有了这个项目：git clone git://github.com/rmtheis/tess-two.git （这个包里面内容太多，不过也省得下那么多库了）
public class MainActivity
extends Activity {
private static final String TAG = "MainActivity ...";
private static final String TESSBASE_PATH = "/mnt/sdcard/tesseract/";
private static final String DEFAULT_LANGUAGE = "eng";
private static final String IMAGE_PATH = "/mnt/sdcard/test1.jpg";
private static final String EXPECTED_FILE = TESSBASE_PATH + "tessdata/" + DEFAULT_LANGUAGE
+ ".traineddata";
private TessBaseAPI service;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
testOcr();
}
public void testOcr(){
mHandler.post(
new Runnable() {
@Override
public void run() {
Log.d(TAG, "begin>>>>>>>");
ocr();
//test();
}
});
}
public void test(){
// First, make sure the eng.traineddata file exists.
/*assertTrue("Make sure that you've copied " + DEFAULT_LANGUAGE + ".traineddata to "
+ EXPECTED_FILE, new File(EXPECTED_FILE).exists());*/ final TessBaseAPI baseApi =
new TessBaseAPI();
baseApi.init(TESSBASE_PATH, DEFAULT_LANGUAGE);
final Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.test);
//digits is a .jpg image I found in one of the issues here.
ImageView img = (ImageView) findViewById(R.id.image);
img.setImageBitmap(bmp);
//I can see the ImageView. So we know that it should work if I sent it to the setImage()
baseApi.setImage(bmp);
Log.v("Kishore","Kishore:Working");
//This statement is never reached. Futhermore, on putting some more Log.v commands in the setImage function, I found out that the native function nativeSetImagePix is never accessed. I have attached the Logcat output below to show that it is not accessed.
String outputText = baseApi.getUTF8Text();
Log.v("Kishore","Kishore:"+outputText);
baseApi.end();
bmp.recycle();
}
protected void ocr() {
BitmapFactory.Options options =
new BitmapFactory.Options();
options.inSampleSize = 2;
Bitmap bitmap = BitmapFactory.decodeFile(IMAGE_PATH, options);
try {
ExifInterface exif =
new ExifInterface(IMAGE_PATH);
int exifOrientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
Log.v(TAG, "Orient: " + exifOrientation);
int rotate = 0;
switch (exifOrientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
}
Log.v(TAG, "Rotation: " + rotate);
if (rotate != 0) {
// Getting width & height of the given image.
int w = bitmap.getWidth();
int h = bitmap.getHeight();
// Setting pre rotate
Matrix mtx =
new Matrix();
mtx.preRotate(rotate);
// Rotating Bitmap
bitmap = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx,
false);
// tesseract req. ARGB_8888
bitmap = bitmap.copy(Bitmap.Config.ARGB_8888,
true);
}
}
catch (IOException e) {
Log.e(TAG, "Rotate or coversion failed: " + e.toString());
}
ImageView iv = (ImageView) findViewById(R.id.image);
iv.setImageBitmap(bitmap);
iv.setVisibility(View.VISIBLE);
Log.v(TAG, "Before baseApi");
TessBaseAPI baseApi =
new TessBaseAPI();
baseApi.setDebug(
true);
baseApi.init(TESSBASE_PATH, DEFAULT_LANGUAGE);
baseApi.setImage(bitmap);
String recognizedText = baseApi.getUTF8Text();
baseApi.end();
Log.v(TAG, "OCR Result: " + recognizedText);
// clean up and show
if (DEFAULT_LANGUAGE.equalsIgnoreCase("eng")) {
recognizedText = recognizedText.replaceAll("[^a-zA-Z0-9]+", " ");
}
if (recognizedText.length() != 0) {
((TextView) findViewById(R.id.field)).setText(recognizedText.trim());
}
}
private Handler mHandler =
new Handler(){
public void handleMessage(android.os.Message msg) {
};
};
}
adb shell mkdir /mnt/sdcard/tesseract
adb shell mkdir /mnt/sdcard/tesseract/tessdata
adb push eng.traineddata /mnt/sdcard/tesseract/tessdata/eng.traineddata
adb shell ls -l /mnt/sdcard/tesseract/tessdata
ls -l bin/tesseract-android-tools-test.apk
adb install -r -s bin/tesseract-android-tools-test.apk
adb shell am instrument -w -e
class com.googlecode.tesseract.android.test.TessBaseAPITest com.googlecode.tesseract.android.test/android.test.InstrumentationTestRunner
