java - Tesseract 无法将数据复制到 SD？

Question

我认为我的路径做错了，但我不知道是什么。我正在 Nexus 7 上测试是否相关。在下面的示例中，我尝试将 tessdata 文件夹复制到 SD 卡，但它一直告诉我无法复制未找到的文件。我不太明白为什么。 (我将 tesseract 项目作为库，并将 tessdata 文件夹复制到 Assets 中)。感谢所有帮助，谢谢!

代码:

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.app.Activity;
import android.content.Intent;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import com.googlecode.tesseract.android.TessBaseAPI;

public class MainActivity extends Activity {
        private static ImageView imageView;
        // protected static Bitmap bit;
        protected static Bitmap mImageBitmap;
        // protected static String DATA_PATH;
        public static final String STORAGE_PATH = Environment.getExternalStorageDirectory().toString() + "/rjb";
        protected static String tesspath = STORAGE_PATH + "/tessdata";
        protected static String savepath = null;
        protected static String TAG = "OCR";
        protected static String lang = "eng";

        // main method
        @Override
        protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);

                // This is my image view for to show the image with
                imageView = (ImageView) this.findViewById(R.id.imageView1);
                // this is the take a photo button
                Button photoButton = (Button) this.findViewById(R.id.button1);

                //check if the rjb directory is there
                //make it if its not
                createmydir();

                //if (!(new File(STORAGE_PATH + File.separator + "tessdata" + File.separator + lang + ".traineddata")).exists()) {
                        try {
                                AssetManager assetManager = this.getAssets();
                                //open the asset manager and open the traineddata path
                                InputStream in = assetManager.open("tessdata/eng.traineddata");
                                OutputStream out = new FileOutputStream(tesspath + "/eng.traineddata");
                                byte[] buf = new byte[8024];
                                int len;
                                while ((len = in.read(buf)) > 0) {
                                        out.write(buf, 0, len);
                                }
                                in.close();
                                out.close();
                        } catch (IOException e) {
                                android.util.Log.e(TAG, "Was unable to copy " + lang
                                                + " traineddata " + e.toString());
                                android.util.Log.e(TAG, "IM PRINTING THE STACK TRACE");
                                e.printStackTrace();
                        }
                //} else {
                        processImage(STORAGE_PATH + File.separator + "savedAndroid.jpg");
                //}
                photoButton.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                                // CALL THE PICTURE (this works)
                                dispatchTakePictureIntent(0);
                        }
                });
        }

        private void createmydir() {
                File t = new File(STORAGE_PATH);

                if(t.exists()) {
                        Toast.makeText(getApplicationContext(), "IM TOASTIN CAUSE IT EXISTS", Toast.LENGTH_LONG).show();
                }
                else {

                        t.mkdirs();
                        Toast.makeText(getApplicationContext(), "IM TOASTIN CUZ I MADE IT EXIST", Toast.LENGTH_LONG).show();
                }
        }

        private void handleSmallCameraPhoto(Intent intent) {
                Bundle extras = intent.getExtras();
                mImageBitmap = (Bitmap) extras.get("data");
                imageView.setImageBitmap(mImageBitmap);
                BitmapFactory.Options options = new BitmapFactory.Options();
                options.inSampleSize = 4;

                saveImageAndroid(mImageBitmap);

                Bitmap bitmap = BitmapFactory.decodeFile(savepath, options);
                ExifInterface exif;
                try {
                        exif = new ExifInterface(savepath);
                        int exifOrientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION,ExifInterface.ORIENTATION_NORMAL);
                        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;
                        }
                        if (rotate != 0) {
                                int w = bitmap.getWidth();
                                int h = bitmap.getHeight();
                                // Setting pre rotate
                                Matrix mtx = new Matrix();
                                mtx.preRotate(rotate);
                                // Rotating Bitmap & convert to ARGB_8888, required by tess
                                bitmap = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, false);
                                bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
                        }



                        // DATA_PATH = getDataPath();

                } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                }
        }

        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                handleSmallCameraPhoto(data);
        }

        // write bitmap to storage
        // saves it as savedandroid.jpg
        // saves location in savepath
        private void saveImageAndroid(final Bitmap passedBitmap) {
                try {
                        savepath = STORAGE_PATH + File.separator + "savedAndroid.jpg";
                        FileOutputStream mFileOutStream = new FileOutputStream(savepath);
                        passedBitmap.compress(Bitmap.CompressFormat.JPEG, 100,mFileOutStream);
                        mFileOutStream.flush();
                        mFileOutStream.close();
                } catch (Exception e) {
                        e.printStackTrace();
                }
        }

        private void dispatchTakePictureIntent(int actionCode) {
                Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(takePictureIntent, actionCode);
        }

        private void processImage(final String filePath) {
                BitmapFactory.Options options = new BitmapFactory.Options();
                options.inSampleSize = 2;
                options.inPurgeable = true;
                Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);
                if (bitmap != null) {
                        /*
                         * was for rotating but no longer needed int width =
                         * bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix
                         * = new Matrix(); matrix.postRotate(rotation); bitmap =
                         * Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, false);
                         * bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
                         */

                        TessBaseAPI baseApi = new TessBaseAPI();
                        baseApi.setDebug(true);
                        baseApi.init(STORAGE_PATH, "eng");
                        baseApi.setPageSegMode(100);
                        baseApi.setPageSegMode(7);
                        baseApi.setImage(bitmap);
                        String recognizedText = baseApi.getUTF8Text();
                        android.util.Log.i(TAG, "recognizedText: 1 " + recognizedText);
                        baseApi.end();
                        if (lang.equalsIgnoreCase("eng")) {
                                recognizedText = recognizedText
                                                .replaceAll("[^a-zA-Z0-9]+", " ");
                        }
                        android.util.Log.i(TAG,
                                        "recognizedText: 2 " + recognizedText.trim());
                }
        }
}

Answer 1

首先尝试将文件放在 SD 卡上，然后在像耳朵这样的简单图像上尝试简单的 ocr，如果有效，则通过程序复制语言文件，因为这样您可能会知道错误出在哪里。