ML Kit Firebase textDetection 检测不清晰

Question

从相机拍照后在 textView 中显示的项目。使用 Firebase ML 套件进行文本检测。那不是清楚地检测文本。它检测到一些单词，但不能清楚地检测到所有单词。使用位图，如果这个位图产生这个问题，我不会。我应该将 SurfaceView 用于相机吗？或者有什么解决办法？

activity_main.xml

 <?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ImageButton
        android:id="@+id/cameraButton"
        android:layout_width="108dp"
        android:layout_height="72dp"
        android:layout_marginStart="44dp"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="32dp"
        android:background="@color/white"
        android:src="@drawable/ic_baseline_camera_alt_24"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView"
        app:layout_constraintVertical_bias="0.427" />

    <ImageButton
        android:id="@+id/detectButton"
        android:layout_width="108dp"
        android:layout_height="72dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="44dp"
        android:layout_marginBottom="41dp"
        android:background="@color/white"
        android:src="@drawable/ic_baseline_done_outline_24"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView"
        app:layout_constraintVertical_bias="0.445" />

    <ImageView
        android:id="@+id/mImageView"
        android:layout_width="0dp"
        android:layout_height="346dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:scaleType="fitXY"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/ic_baseline_image_24" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginTop="24dp"
        android:layout_marginEnd="16dp"
        android:fontFamily="@font/segoeui"
        android:textSize="20sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/mImageView" />

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {
    ImageView mImageView;
    ImageButton cameraBtn;
    ImageButton detectBtn;
    Bitmap imageBitmap;
    TextView textView;
    String log = "error";
    static final int REQUEST_IMAGE_CAPTURE = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mImageView = findViewById(R.id.mImageView);
        cameraBtn = findViewById(R.id.cameraButton);
        detectBtn = findViewById(R.id.detectButton);
        textView = findViewById(R.id.textView);
        textView.setTypeface(ResourcesCompat.getFont(this, R.font.segoeui));

        cameraBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                dispatchTakePictureIntent();
                textView.setText("");
            }
        });
        detectBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                detectTextFromImage();

            }
        });
    }


    private void dispatchTakePictureIntent() {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (takePictureIntent.resolveActivity(getPackageManager())!= null) {
            startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
              Bundle extras = data.getExtras();
              imageBitmap = (Bitmap) extras.get("data");
              mImageView.setImageBitmap(imageBitmap);
        }
    }

    private void detectTextFromImage() {
        FirebaseVisionImage firebaseVisionImage = FirebaseVisionImage.fromBitmap(imageBitmap);
        FirebaseVisionCloudTextRecognizerOptions options = new FirebaseVisionCloudTextRecognizerOptions.Builder()
                .setLanguageHints(Arrays.asList("eng","hi"))
                .build();
        FirebaseVisionTextRecognizer detector = FirebaseVision.getInstance()
                .getCloudTextRecognizer(options);
        Task<FirebaseVisionText> result =
                detector.processImage(firebaseVisionImage)
                        .addOnSuccessListener(new OnSuccessListener<FirebaseVisionText>() {
                            @Override
                            public void onSuccess(FirebaseVisionText firebaseVisionText) {
                                // Task completed successfully
                                // ...
                                displayTextFromImage(firebaseVisionText);
                            }
                        })
                        .addOnFailureListener(
                                new OnFailureListener() {
                                    @Override
                                    public void onFailure(@NonNull Exception e) {
                                        // Task failed with an exception
                                    }
                                });

    }

    private void displayTextFromImage(FirebaseVisionText firebaseVisionText) {
        List<FirebaseVisionText.TextBlock> blockList = firebaseVisionText.getTextBlocks();
        if (blockList.size() == 0){
            Toast.makeText(this,"No Text Found in image!",Toast.LENGTH_SHORT).show();
        }
        else{
            for (FirebaseVisionText.TextBlock block: firebaseVisionText.getTextBlocks()) {
                String text = block.getText();
                textView.setText(text);
            }
        }
    }

Answer 1

https://developers.google.com/ml-kit/samples（视觉快速入门）有一个适用于 iOS 和 Android 平台的文本识别示例应用程序，似乎两者都可以成功检测给定图像中的文本？