拍摄照片后无法检测到脸部

Question

当我在可绘制文件夹中使用照片时，我的应用程序可以检测照片中的面孔。但是当我用相机拍摄照片时，我的应用程序无法检测到脸部。

这是我的代码，可处理可绘制文件夹中的照片：

BitmapFactory.Options options = new BitmapFactory.Options();
            options.inMutable=true;
            bitmap = BitmapFactory.decodeResource(getApplicationContext().getResources(), R.drawable.test2, options);

            Paint myRectPaint = new Paint();
            myRectPaint.setStrokeWidth(5);
            myRectPaint.setColor(Color.RED);
            myRectPaint.setStyle(Paint.Style.STROKE);

            Bitmap tempBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.RGB_565);

            Canvas tempCanvas = new Canvas(tempBitmap);
            tempCanvas.drawBitmap(bitmap, 0,0,null);

            FaceDetector faceDetector = new FaceDetector.Builder(getApplicationContext()).setTrackingEnabled(false).build();
            if(!faceDetector.isOperational()){
                Toast.makeText(getApplicationContext(), "face detection not working", Toast.LENGTH_SHORT).show();
            }

            Frame frame = new Frame.Builder().setBitmap(bitmap).build();
            SparseArray<Face> faces = faceDetector.detect(frame);

            for(int i = 0; i < faces.size(); i++){
                Face thisFace = faces.valueAt(i);
                float x1 =  thisFace.getPosition().x;
                float y1 = thisFace.getPosition().y;
                float x2 = x1 + thisFace.getWidth();
                float y2 = y1 + thisFace.getHeight();
                tempCanvas.drawRoundRect(new RectF(x1, y1, x2, y2), 2, 2, myRectPaint);
            }

            imageView.setImageDrawable(new BitmapDrawable(getResources(), tempBitmap));

这是我的照片代码，该照片是在相机中捕获的，无法检测到脸部

BitmapFactory.Options options = new BitmapFactory.Options();
            options.inMutable=true;
            bitmap = BitmapFactory.decodeFile(pathToFile, options);


            Paint myRectPaint = new Paint();
            myRectPaint.setStrokeWidth(5);
            myRectPaint.setColor(Color.RED);
            myRectPaint.setStyle(Paint.Style.STROKE);

            Bitmap tempBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.RGB_565);

            Canvas tempCanvas = new Canvas(tempBitmap);
            tempCanvas.drawBitmap(bitmap, 0,0,null);

            FaceDetector faceDetector = new FaceDetector.Builder(getApplicationContext()).setTrackingEnabled(false).build();
            if(!faceDetector.isOperational()){
                Toast.makeText(getApplicationContext(), "face detection not working", Toast.LENGTH_SHORT).show();
            }

            Frame frame = new Frame.Builder().setBitmap(bitmap).build();
            SparseArray<Face> faces = faceDetector.detect(frame);

            for(int i = 0; i < faces.size(); i++){
                Face thisFace = faces.valueAt(i);
                float x1 =  thisFace.getPosition().x;
                float y1 = thisFace.getPosition().y;
                float x2 = x1 + thisFace.getWidth();
                float y2 = y1 + thisFace.getHeight();
                tempCanvas.drawRoundRect(new RectF(x1, y1, x2, y2), 2, 2, myRectPaint);
            }

            imageView.setImageDrawable(new BitmapDrawable(getResources(), tempBitmap));

请帮助。谢谢！