为啥人脸识别要用彩灯
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参考技术A 活体检测一种。离线3D结构光活体检测 --> 基于3D结构光成像原理，通过人脸表面反射光线构建深度图像，判断目标是否为活体，可强效防御图片、视频、屏幕、模具等攻击。
3D结构光成像是将图案投影到三维空间物体表面上，使用另外一个相机观察在三维物理表面成像的畸变情况。
为啥 Google 的 ML 人脸检测工具包在 .process() 上崩溃
【中文标题】为啥 Google 的 ML 人脸检测工具包在 .process() 上崩溃【英文标题】：Why is Google's ML Face Detection Kit crashing on .process()为什么 Google 的 ML 人脸检测工具包在 .process() 上崩溃 【发布时间】：2021-07-16 22:07:25 【问题描述】：我正在创建一个面部检测器应用程序，它将实时检测面部并识别面部上的地标。人脸的地标工作得很好，但是我的实时人脸检测根本没有工作。
我按照 Google 的 ML Kit(https://developers.google.com/ml-kit/vision/face-detection/android) 中的说明进行操作，但我真的很难获得实时人脸检测的功能。
在我的调试器中，代码在facedetector.process(image).addOnSuccessListener() 崩溃，而是进入onFailure()
这是我的实时人脸检测部分的代码（我已经评论了一些部分+减少了冗余）。
@Override
//process method to detect frame by frame in real time face detection
public void process(@NonNull Frame frame)
int width = frame.getSize().getWidth();
int height = frame.getSize().getHeight();
InputImage image = InputImage.fromByteArray(
frame.getData(),
/* image width */width,
/* image height */height,
//if camera is facing front rotate image 90, else 270 degrees
(cameraFacing != Facing.FRONT) ? 90 : 270,
InputImage.IMAGE_FORMAT_YUV_420_888 // or IMAGE_FORMAT_YV12
);
FaceDetectorOptions faceDetectorOptions = new FaceDetectorOptions.Builder()
.setContourMode(FaceDetectorOptions.CONTOUR_MODE_ALL)
//setting contour mode to detect all facial contours in real time
.build();
FaceDetector faceDetector = FaceDetection.getClient(faceDetectorOptions);
faceDetector.process(image).addOnSuccessListener(new OnSuccessListener<List<Face>>()
@Override
public void onSuccess(@NonNull List<Face> faces)
imageView.setImageBitmap(null);
Bitmap bitmap = Bitmap.createBitmap(height, width, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Paint dotPaint = new Paint();
dotPaint.setColor(Color.YELLOW);
dotPaint.setStyle(Paint.Style.FILL);
dotPaint.setStrokeWidth(6f);
Paint linePaint = new Paint();
linePaint.setColor(Color.GREEN);
linePaint.setStyle(Paint.Style.STROKE);
linePaint.setStrokeWidth(4f);
//looping through each face to detect each contour
for (Face face : faces)
List<PointF> faceContours = face.getContour(
FaceContour.FACE
).getPoints();
for (int i = 0; i < faceContours.size(); i++)
PointF faceContour = null;
if (i != (faceContours.size() - 1))
faceContour = faceContours.get(i);
canvas.drawLine(
faceContour.x, faceContour.y, faceContours.get(i + 1).x, faceContours.get(i + 1).y, linePaint
);
else //if at the last point, draw to the first point
canvas.drawLine(faceContour.x, faceContour.y, faceContours.get(0).x, faceContours.get(0).y, linePaint);
canvas.drawCircle(faceContour.x, faceContour.y, 4f, dotPaint);
//end inner loop
List<PointF> leftEyebrowTopCountours = face.getContour(
FaceContour.LEFT_EYEBROW_TOP).getPoints();
for (int i = 0; i < leftEyebrowTopCountours.size(); i++)
PointF leftEyebrowTopContour = leftEyebrowTopCountours.get(i);
if (i != (leftEyebrowTopCountours.size() - 1))
canvas.drawLine(leftEyebrowTopContour.x, leftEyebrowTopContour.y, leftEyebrowTopCountours.get(i + 1).x, leftEyebrowTopCountours.get(i + 1).y, linePaint);
canvas.drawCircle(leftEyebrowTopContour.x, leftEyebrowTopContour.y, 4f, dotPaint);
旁注：我在模拟器中使用 Pixel 2 API 29。因为我只是通过轮廓，所以我省略了重复的代码
完整代码供参考：
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.material.bottomsheet.BottomSheetBehavior;
import com.google.mlkit.vision.common.InputImage;
import com.google.mlkit.vision.face.Face;
import com.google.mlkit.vision.face.FaceContour;
import com.google.mlkit.vision.face.FaceDetection;
import com.google.mlkit.vision.face.FaceDetector;
import com.google.mlkit.vision.face.FaceDetectorOptions;
import com.google.mlkit.vision.face.FaceLandmark;
import com.otaliastudios.cameraview.CameraView;
import com.otaliastudios.cameraview.controls.Facing;
import com.otaliastudios.cameraview.frame.Frame;
import com.otaliastudios.cameraview.frame.FrameProcessor;
import com.theartofdev.edmodo.cropper.CropImage;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
public class MainActivity extends AppCompatActivity implements FrameProcessor
private Facing cameraFacing = Facing.FRONT;
private ImageView imageView;
private CameraView faceDetectionCameraView;
private RecyclerView bottomSheetRecyclerView;
private BottomSheetBehavior bottomSheetBehavior;
private ArrayList<FaceDetectionModel> faceDetectionModels;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
faceDetectionModels = new ArrayList<>();
bottomSheetBehavior = BottomSheetBehavior.from(findViewById(R.id.bottom_sheet));
imageView = findViewById(R.id.face_detection_image_view);
faceDetectionCameraView = findViewById(R.id.face_detection_camera_view);
Button toggle = findViewById(R.id.face_detection_cam_toggle_button);
FrameLayout bottomSheetButton = findViewById(R.id.bottom_sheet_button);
bottomSheetRecyclerView = findViewById(R.id.bottom_sheet_recycler_view);
faceDetectionCameraView.setFacing(cameraFacing);
faceDetectionCameraView.setLifecycleOwner(MainActivity.this);
faceDetectionCameraView.addFrameProcessor(MainActivity.this);
toggle.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
cameraFacing = (cameraFacing == Facing.FRONT) ? Facing.BACK : Facing.FRONT;
faceDetectionCameraView.setFacing(cameraFacing);
);
bottomSheetButton.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
CropImage.activity().start(MainActivity.this);
);
bottomSheetRecyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
bottomSheetRecyclerView.setAdapter(new FaceDetectionAdapter(faceDetectionModels, MainActivity.this));
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data)
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE)
CropImage.ActivityResult result = CropImage.getActivityResult(data);
if(resultCode == RESULT_OK)
Uri imageUri = result.getUri();
try
analyseImage(MediaStore.Images.Media.getBitmap(getContentResolver(), imageUri));
catch (IOException e)
e.printStackTrace();
private void analyseImage(Bitmap bitmap)
if(bitmap == null)
Toast.makeText(this, "There was an error", Toast.LENGTH_SHORT).show();
//imageView.setImageBitmap(null);
faceDetectionModels.clear();
Objects.requireNonNull(bottomSheetRecyclerView.getAdapter()).notifyDataSetChanged();
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
showProgress();
InputImage firebaseInputImage = InputImage.fromBitmap(bitmap, 0);
FaceDetectorOptions options =
new FaceDetectorOptions.Builder()
.setPerformanceMode(FaceDetectorOptions.PERFORMANCE_MODE_ACCURATE)
.setLandmarkMode(FaceDetectorOptions.LANDMARK_MODE_ALL)
.setClassificationMode(FaceDetectorOptions.CLASSIFICATION_MODE_ALL)
.build();
FaceDetector faceDetector = FaceDetection.getClient(options);
faceDetector.process(firebaseInputImage)
.addOnSuccessListener(new OnSuccessListener<List<Face>>()
@Override
public void onSuccess(@NonNull List<Face> faces)
Bitmap mutableImage = bitmap.copy(Bitmap.Config.ARGB_8888, true);
detectFaces(faces, mutableImage);
imageView.setImageBitmap(mutableImage);
hideProgress();
bottomSheetRecyclerView.getAdapter().notifyDataSetChanged();
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
)
.addOnFailureListener(new OnFailureListener()
@Override
public void onFailure(@NonNull Exception e)
Toast.makeText(MainActivity.this, "There was an error", Toast.LENGTH_SHORT).show();
hideProgress();
);
private void detectFaces(List<Face> faces, Bitmap bitmap)
if(faces == null || bitmap == null)
Toast.makeText(this, "There was an error", Toast.LENGTH_SHORT).show();
return;
Canvas canvas = new Canvas(bitmap);
Paint facePaint = new Paint();
facePaint.setColor(Color.GREEN);
facePaint.setStyle(Paint.Style.STROKE);
facePaint.setStrokeWidth(5f);
Paint faceTextPaint = new Paint();
faceTextPaint.setColor(Color.BLUE);
faceTextPaint.setTextSize(30f);
faceTextPaint.setTypeface(Typeface.SANS_SERIF);
Paint landmarkPaint = new Paint();
landmarkPaint.setColor(Color.YELLOW);
landmarkPaint.setStyle(Paint.Style.FILL);
landmarkPaint.setStrokeWidth(8f);
for(int i = 0; i < faces.size(); i++)
canvas.drawRect(faces.get(i).getBoundingBox(), facePaint);
canvas.drawText("Face" + i,
(faces.get(i).getBoundingBox().centerX()
-(faces.get(i).getBoundingBox().width() >> 1) + 8f),
(faces.get(i).getBoundingBox().centerY() + (faces.get(i).getBoundingBox().height() >> 1) - 8f), facePaint);
Face face = faces.get(i); //get one face
if(face.getLandmark(FaceLandmark.LEFT_EYE) != null)
FaceLandmark leftEye = face.getLandmark(FaceLandmark.LEFT_EYE);
//Now we have our left eye, we draw a little circle
canvas.drawCircle(leftEye.getPosition().x, leftEye.getPosition().y, 8f, landmarkPaint);
if(face.getLandmark(FaceLandmark.RIGHT_EYE) != null)
FaceLandmark rightEye = face.getLandmark(FaceLandmark.RIGHT_EYE);
//Now we have our left eye, we draw a little circle
canvas.drawCircle(rightEye.getPosition().x, rightEye.getPosition().y, 8f, landmarkPaint);
if(face.getLandmark(FaceLandmark.NOSE_BASE) != null)
FaceLandmark noseBase = face.getLandmark(FaceLandmark.NOSE_BASE);
//Now we have our left eye, we draw a little circle
canvas.drawCircle(noseBase.getPosition().x, noseBase.getPosition().y, 8f, landmarkPaint);
if(face.getLandmark(FaceLandmark.LEFT_EAR) != null)
FaceLandmark leftEar = face.getLandmark(FaceLandmark.LEFT_EAR);
//Now we have our left eye, we draw a little circle
canvas.drawCircle(leftEar.getPosition().x, leftEar.getPosition().y, 8f, landmarkPaint);
if(face.getLandmark(FaceLandmark.RIGHT_EAR) != null)
FaceLandmark rightEar = face.getLandmark(FaceLandmark.RIGHT_EAR);
//Now we have our left eye, we draw a little circle
canvas.drawCircle(rightEar.getPosition().x, rightEar.getPosition().y, 8f, landmarkPaint);
if(face.getLandmark(FaceLandmark.MOUTH_LEFT) != null && face.getLandmark(FaceLandmark.MOUTH_BOTTOM) != null && face.getLandmark(FaceLandmark.MOUTH_RIGHT) != null)
FaceLandmark mouthLeft = face.getLandmark(FaceLandmark.MOUTH_LEFT);
FaceLandmark mouthRight = face.getLandmark(FaceLandmark.MOUTH_RIGHT);
FaceLandmark mouthBottom = face.getLandmark(FaceLandmark.MOUTH_BOTTOM);
//Now we have our left eye, we draw a little circle
canvas.drawLine(mouthLeft.getPosition().x, mouthLeft.getPosition().y, mouthBottom.getPosition().x, mouthBottom.getPosition().y, landmarkPaint);
canvas.drawLine(mouthBottom.getPosition().x, mouthBottom.getPosition().y, mouthRight.getPosition().x, mouthRight.getPosition().y, landmarkPaint);
faceDetectionModels.add(new FaceDetectionModel(i, "Smiling probability"
+ face.getSmilingProbability()));
faceDetectionModels.add(new FaceDetectionModel(i, "Left eye open probability"
+ face.getLeftEyeOpenProbability()));
faceDetectionModels.add(new FaceDetectionModel(i, "Right eye open probability"
+ face.getRightEyeOpenProbability()));
private void showProgress()
findViewById(R.id.bottom_sheet_button_img).setVisibility(View.GONE);
findViewById(R.id.bottom_sheet_butotn_progress_bar).setVisibility(View.VISIBLE);
private void hideProgress()
findViewById(R.id.bottom_sheet_button_img).setVisibility(View.VISIBLE);
findViewById(R.id.bottom_sheet_butotn_progress_bar).setVisibility(View.GONE);
//real-time detection starts HERE
@Override
public void process(@NonNull Frame frame)
//setting up width and frame height
int width = frame.getSize().getWidth();
int height = frame.getSize().getHeight();
byte[] byteArray = frame.getData();
InputImage image = InputImage.fromByteArray(
//frame.getData()
byteArray,
width,
height,
//rotation
(cameraFacing == Facing.FRONT) ? 90 : 270,
//image format
InputImage.IMAGE_FORMAT_YV12 // or IMAGE_FORMAT_YV12
);
//Contour mode all is real time contour detection
FaceDetectorOptions realTimeOpts = new FaceDetectorOptions.Builder()
.setContourMode(FaceDetectorOptions.CONTOUR_MODE_ALL)
.build();
FaceDetector faceDetector = FaceDetection.getClient(realTimeOpts);
faceDetector.process(image).addOnSuccessListener(new OnSuccessListener<List<Face>>()
@Override
public void onSuccess(@NonNull List<Face> faces)
//don't have image yet set to null first
imageView.setImageBitmap(null);
//bitmap stores pixels of image
Bitmap bitmap = Bitmap.createBitmap(height, width, Bitmap.Config.ARGB_8888);
//canvas hold the draw calls -- write into the bitmap
Canvas canvas = new Canvas(bitmap);
//paint specifies what the canvas should draw
Paint dotPaint = new Paint();
dotPaint.setColor(Color.YELLOW);
dotPaint.setStyle(Paint.Style.FILL);
dotPaint.setStrokeWidth(6f);
Paint linePaint = new Paint();
linePaint.setColor(Color.GREEN);
linePaint.setStyle(Paint.Style.STROKE);
linePaint.setStrokeWidth(4f);
for (Face face : faces)
//fetching contours
List<PointF> faceContours = face.getContour(
FaceContour.FACE
).getPoints();
for (int i = 0; i < faceContours.size(); i++)
PointF faceContour = faceContours.get(i);
if (i != (faceContours.size() - 1))
canvas.drawLine(
//if not at last index, continue drawing to next index
faceContour.x, faceContour.y, faceContours.get(i + 1).x, faceContours.get(i + 1).y, linePaint
);
else
return;
//always draw circle
canvas.drawCircle(faceContour.x, faceContour.y, 4f, dotPaint);
//end inner loop
List<PointF> leftEyebrowTopCountours = face.getContour(
FaceContour.LEFT_EYEBROW_TOP).getPoints();
for (int i = 0; i < leftEyebrowTopCountours.size(); i++)
PointF leftEyebrowTopContour = leftEyebrowTopCountours.get(i);
if (i != (leftEyebrowTopCountours.size() - 1))
canvas.drawLine(leftEyebrowTopContour.x, leftEyebrowTopContour.y, leftEyebrowTopCountours.get(i + 1).x, leftEyebrowTopCountours.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(leftEyebrowTopContour.x, leftEyebrowTopContour.y, 4f, dotPaint);
List<PointF> rightEyebrowTopCountours = face.getContour(
FaceContour.RIGHT_EYEBROW_TOP).getPoints();
for (int i = 0; i < rightEyebrowTopCountours.size(); i++)
PointF rightEyebrowContour = rightEyebrowTopCountours.get(i);
if (i != (rightEyebrowTopCountours.size() - 1))
canvas.drawLine(rightEyebrowContour.x, rightEyebrowContour.y, rightEyebrowTopCountours.get(i + 1).x, rightEyebrowTopCountours.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(rightEyebrowContour.x, rightEyebrowContour.y, 4f, dotPaint);
List<PointF> rightEyebrowBottomCountours = face.getContour(
FaceContour.RIGHT_EYEBROW_BOTTOM).getPoints();
for (int i = 0; i < rightEyebrowBottomCountours.size(); i++)
PointF rightEyebrowBottomContour = rightEyebrowBottomCountours.get(i);
if (i != (rightEyebrowBottomCountours.size() - 1))
canvas.drawLine(rightEyebrowBottomContour.x, rightEyebrowBottomContour.y, rightEyebrowBottomCountours.get(i + 1).x, rightEyebrowBottomCountours.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(rightEyebrowBottomContour.x, rightEyebrowBottomContour.y, 4f, dotPaint);
List<PointF> leftEyeContours = face.getContour(
FaceContour.LEFT_EYE).getPoints();
for (int i = 0; i < leftEyeContours.size(); i++)
PointF leftEyeContour = leftEyeContours.get(i);
if (i != (leftEyeContours.size() - 1))
canvas.drawLine(leftEyeContour.x, leftEyeContour.y, leftEyeContours.get(i + 1).x, leftEyeContours.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(leftEyeContour.x, leftEyeContour.y, 4f, dotPaint);
List<PointF> rightEyeContours = face.getContour(
FaceContour.RIGHT_EYE).getPoints();
for (int i = 0; i < rightEyeContours.size(); i++)
PointF rightEyeContour = rightEyeContours.get(i);
if (i != (rightEyeContours.size() - 1))
canvas.drawLine(rightEyeContour.x, rightEyeContour.y, rightEyeContours.get(i + 1).x, rightEyeContours.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(rightEyeContour.x, rightEyeContour.y, 4f, dotPaint);
List<PointF> upperLipTopContour = face.getContour(
FaceContour.UPPER_LIP_TOP).getPoints();
for (int i = 0; i < upperLipTopContour.size(); i++)
PointF upperLipContour = upperLipTopContour.get(i);
if (i != (upperLipTopContour.size() - 1))
canvas.drawLine(upperLipContour.x, upperLipContour.y,
upperLipTopContour.get(i + 1).x,
upperLipTopContour.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(upperLipContour.x, upperLipContour.y, 4f, dotPaint);
List<PointF> upperLipBottomContour = face.getContour(
FaceContour.UPPER_LIP_BOTTOM).getPoints();
for (int i = 0; i < upperLipBottomContour.size(); i++)
PointF upBottom = upperLipBottomContour.get(i);
if (i != (upperLipBottomContour.size() - 1))
canvas.drawLine(upBottom.x, upBottom.y, upperLipBottomContour.get(i + 1).x, upperLipBottomContour.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(upBottom.x, upBottom.y, 4f, dotPaint);
List<PointF> lowerLipTopContour = face.getContour(
FaceContour.LOWER_LIP_TOP).getPoints();
for (int i = 0; i < lowerLipTopContour.size(); i++)
PointF lowerTop = lowerLipTopContour.get(i);
if (i != (lowerLipTopContour.size() - 1))
canvas.drawLine(lowerTop.x, lowerTop.y, lowerLipTopContour.get(i + 1).x, lowerLipTopContour.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(lowerTop.x, lowerTop.y, 4f, dotPaint);
List<PointF> lowerLipBottomContour = face.getContour(
FaceContour.LOWER_LIP_BOTTOM).getPoints();
for (int i = 0; i < lowerLipBottomContour.size(); i++)
PointF lowerBottom = lowerLipBottomContour.get(i);
if (i != (lowerLipBottomContour.size() - 1))
canvas.drawLine(lowerBottom.x, lowerBottom.y, lowerLipBottomContour.get(i + 1).x, lowerLipBottomContour.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(lowerBottom.x, lowerBottom.y, 4f, dotPaint);
List<PointF> noseBridgeContours = face.getContour(
FaceContour.NOSE_BRIDGE).getPoints();
for (int i = 0; i < noseBridgeContours.size(); i++)
PointF noseBridge = noseBridgeContours.get(i);
if (i != (noseBridgeContours.size() - 1))
canvas.drawLine(noseBridge.x, noseBridge.y, noseBridgeContours.get(i + 1).x, noseBridgeContours.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(noseBridge.x, noseBridge.y, 4f, dotPaint);
List<PointF> noseBottomContours = face.getContour(
FaceContour.NOSE_BOTTOM).getPoints();
for (int i = 0; i < noseBottomContours.size(); i++)
PointF noseBottom = noseBottomContours.get(i);
if (i != (noseBottomContours.size() - 1))
canvas.drawLine(noseBottom.x, noseBottom.y, noseBottomContours.get(i + 1).x, noseBottomContours.get(i + 1).y, linePaint);
else
return;
canvas.drawCircle(noseBottom.x, noseBottom.y, 4f, dotPaint);
//facing front flip image
if (cameraFacing == Facing.FRONT)
//Flip image!
Matrix matrix = new Matrix();
matrix.preScale(-1f, 1f);
Bitmap flippedBitmap = Bitmap.createBitmap(bitmap, 0, 0,
bitmap.getWidth(), bitmap.getHeight(),
matrix, true);
imageView.setImageBitmap(flippedBitmap);
else
imageView.setImageBitmap(bitmap);
//end outer loop
canvas.save();
).addOnFailureListener(new OnFailureListener()
@Override
public void onFailure (@NonNull Exception e)
imageView.setImageBitmap(null);
);
编辑：我收到此错误
Getting this error now: 2021-04-27 19:12:05.335 538-1065/system_process E/JavaBinder: *** Uncaught remote exception! (Exceptions are not yet supported across processes.)
java.lang.RuntimeException: android.os.RemoteException: Couldn't get ApplicationInfo for package android.frameworks.sensorservice@1.0::ISensorManager
at android.os.Parcel.writeException(Parcel.java:2158)
at android.os.Binder.execTransactInternal(Binder.java:1178)
at android.os.Binder.execTransact(Binder.java:1123)
Caused by: android.os.RemoteException: Couldn't get ApplicationInfo for package android.frameworks.sensorservice@1.0::ISensorManager
at com.android.server.pm.PackageManagerService$PackageManagerNative.getTargetSdkVersionForPackage(PackageManagerService.java:23957)
at android.content.pm.IPackageManagerNative$Stub.onTransact(IPackageManagerNative.java:255)
at android.os.Binder.execTransactInternal(Binder.java:1159)
at android.os.Binder.execTransact(Binder.java:1123)
非常感谢！！
【问题讨论】：
您遇到的错误是什么？ 嗨，我得到的错误是：2021-04-25 22:19:55.448 17489-19142/? W/android.os.Debug: failed to get memory consumption info: -1，我猜这是因为我使用了几个位图。但是，我需要这些位图用于翻转图像、检测照片中的特征以及实时人脸检测。知道如何避免这个错误吗？谢谢。
这只是一个警告。请发布您的完整 logcat 问题。
嗨，我没有任何错误。我的应用程序没有崩溃，只是实时人脸检测功能不起作用。照片的人脸检测工作正常。在 logcat 的错误下我发现了这个：2021-04-25 23:02:07.186 19552-19552/? E/sh.facedetecto: Unknown bits set in runtime_flags: 0x8000 2021-04-25 23:02:08.165 19552-19602/com.krish.facedetector E/EGL_emulation: eglQueryContext 32c0 EGL_BAD_ATTRIBUTE 2021-04-25 23:02:08.165 19552-19602/com.krish.facedetector E/EGL_emulation: tid 19602: eglQueryContext(1902): error 0x3004 (EGL_BAD_ATTRIBUTE)
另外，我将其添加到问题中。谢谢。
【参考方案1】：
如果您想通过 MLKit 使用相机流输出，您可以使用 CameraX ImageAnalysis 用例。生成YUV_420_888格式的android.media.Image，可以直接转换成mlkit InputImage。
或者，您也可以使用 ML Kit 刚刚发布的 CameraXSource 库。示例代码为here。这消除了您设置 camerax 用例的样板代码，并在内部从 cameraX 输出为您创建 MLKit 输入。请注意，这仍然是一个测试版 SDK。我们期待您的反馈。
为了使用 API，您需要在您的应用中添加以下依赖项：
实现 'com.google.mlkit:camera:16.0.0-beta1'
【讨论】：
您好，我添加了依赖项，但仍然无法正常工作。谢谢。 我把新的错误放在我原来的帖子里。这似乎是一个线程错误：***.com/questions/24429174/…。虽然不知道如何解决它 您好，您不应该在主线程之外进行任何 ui 修改。您可以改用：myAcitity.runOnUiThread(new Runnable() public void run() //在此处更新您的 UI 元素 ); 请更具体。我应该在其中输入哪段代码？谢谢。以上是关于为啥人脸识别要用彩灯的主要内容，如果未能解决你的问题，请参考以下文章