java - Android Studio - 人脸检测失败。E/CameraSource：接收器抛出异常

Question

我正在尝试将当前帧作为 Bipmap 获取，但遇到了以下错误：

09-03 08:12:33.353 28008-28204/com.google.android.gms.samples.vision.face.facetracker E/CameraSource: Exception thrown from receiver.
    java.lang.ArrayIndexOutOfBoundsException
        at android.graphics.Bitmap.checkPixelsAccess(Bitmap.java:1492)
        at android.graphics.Bitmap.getPixels(Bitmap.java:1433)
        at com.google.android.gms.samples.vision.face.facetracker.FaceTrackerActivity$MyFaceDetector.detect(FaceTrackerActivity.java:318)
        at com.google.android.gms.vision.Detector.receiveFrame(Unknown Source)
        at com.google.android.gms.vision.CameraSource$zzb.run(Unknown Source)
        at java.lang.Thread.run(Thread.java:761)

人脸检测不会出现在屏幕上。这是我的 Main_activity（收集的 FaceTrackingActivity）：

private void createCameraSource() {

    Context context = getApplicationContext();
    FaceDetector detector = new FaceDetector.Builder(context)
        .setClassificationType(FaceDetector.ALL_CLASSIFICATIONS)
        .setMode(FaceDetector.ACCURATE_MODE)
        .setLandmarkType(FaceDetector.ALL_LANDMARKS)
        .build();
    MyFaceDetector myFaceDetector = new MyFaceDetector(detector);

    myFaceDetector.setProcessor(
                new MultiProcessor.Builder<>(new GraphicFaceTrackerFactory())
                        .build());

    if (!detector.isOperational()) {

        Log.w(TAG, "Face detector dependencies are not yet available.");
    }

    mCameraSource = new CameraSource.Builder(context, myFaceDetector)
        .setRequestedPreviewSize(640, 480)
        .setFacing(CameraSource.CAMERA_FACING_FRONT)
        .setRequestedFps(30.0f)
       .build();
}

这是我试图获取 Bipmap 图像的代码部分：

class MyFaceDetector extends Detector<Face> {
    private Detector<Face> mDelegate;

    MyFaceDetector(Detector<Face> delegate) {
        mDelegate = delegate;
    }

    public SparseArray<Face> detect(Frame frame) {
        YuvImage yuvImage = new YuvImage(frame.getGrayscaleImageData().array(), ImageFormat.NV21, frame.getMetadata().getWidth(), frame.getMetadata().getHeight(), null); // Create YUV image from byte[]
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        yuvImage.compressToJpeg(new Rect(0, 0, frame.getMetadata().getWidth(), frame.getMetadata().getHeight()), 100, byteArrayOutputStream);// Convert YUV image to Jpeg
        byte[] jpegArray = byteArrayOutputStream.toByteArray();
        Bitmap bmp = BitmapFactory.decodeByteArray(jpegArray, 0, jpegArray.length); // Convert Jpeg to Bitmap
        //image processing part
    }
}

特别是，在 createCameraSOurce 部分中，如果我不在检测器之前编写FaceDetector并且如果我使用字符串 _detector.setProcessor(...)_instead myFaceDetector.setProcessor(...)人脸出现并且应用程序运行没有错误但 myFaceDetector 为“ MyFaceDetector myFaceDetector = new MyFaceDetector(detector);" 从未使用过。我想只处理人脸检测框，但是当我尝试更改某些内容时，我错了

标签： javaandroidandroid-studioandroid-studio-3.1.3