android中ocr解决方案（tesseract）

android应用中ocr的解决方案大致有两种，而采用最多的还是tesseract.小弟就在这里将我最近两天解决思路写下来，如有缺陷，欢迎拍砖：
　　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）。
　　搜先就是下载Tesseract native android library.这里有两个链接，你选哪个链接都可以：
　　a.svn checkout http://tesseract-android-tools.googlecode.com/svn/trunk/ tesseract-android-tools。(如果不能checkout到，废话别说就到官方上下:http://code.google.com/p/tesseract-android-tools/)
　　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）
　　这里先说采用第一个源下载：下载成功后，打开README文件，做下修改（如下）：
git clone git://android.git.kernel.org/platform/external/jpeg.git libjpeg
修改为：
git clone https://android.googlesource.com/platform/external/jpeg libjpeg
n
　　
　　对于第二个源下载，由于里面没有README文件，操作命令如下：
cd <project-directory>/tess-two
export TESSERACT_PATH=${PWD}/external/tesseract-3.01
export LEPTONICA_PATH=${PWD}/external/leptonica-1.68
export LIBJPEG_PATH=${PWD}/external/libjpeg
ndk-build
android update project --path .
ant release

　　最终两个都得到你想要的libs里面的so文件和src里面的对so文件的封装类。这个就是我们开发所用到的东东啦。
　　然后新建工程，代码如下：
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 {
            ExifInte易做图ce exif = new ExifInte易做图ce(IMAGE_PATH);
            int exifOrientation = exif.getAttributeInt(ExifInte易做图ce.TAG_ORIENTATION, ExifInte易做图ce.ORIENTATION_NORMAL);

            Log.v(TAG, "Orient: " + exifOrientation);

            int rotate = 0;
            switch (exifOrientation) {
                case ExifInte易做图ce.ORIENTATION_ROTATE_90:
                    rotate = 90;
                    break;
                case ExifInte易做图ce.ORIENTATION_ROTATE_180:
                    rotate = 180;
                    break;
                case ExifInte易做图ce.ORIENTATION_ROTATE_270:
                    rotate = 270;
          &nbs

补充：移动开发 , Android ,