Java Face类代码示例

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Update the position/characteristics of the face within the overlay.
 */
@Override
public void onUpdate(FaceDetector.Detections<Face> detectionResults, Face face) {
    mOverlay.add(mFaceGraphic);
    boolean isSmiling = face.getIsSmilingProbability() > SMILING_THRESHOLD;
    if (isSmiling) {
        float leftEye = face.getIsLeftEyeOpenProbability();
        float rightEye = face.getIsRightEyeOpenProbability();
        if (Math.abs(leftEye - rightEye) >= WINK_THRESHOLD) {
            takeShot();
        }
    }

    mFaceGraphic.setIsReady(isSmiling);
    mFaceGraphic.updateFace(face);
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Draws the face annotations for position on the supplied canvas.
 */
@Override
public void draw(Canvas canvas) {
    Face face = mFace;
    if (face == null) {
        return;
    }

    // Draws a circle at the position of the detected face, with the face's track id below.
    float x = translateX(face.getPosition().x + face.getWidth() / 2);
    float y = translateY(face.getPosition().y + face.getHeight() / 2);
    float xOffset = scaleX(face.getWidth() / 2.0f);
    float yOffset = scaleY(face.getHeight() / 2.0f);
    float left = x - xOffset;
    float top = y - yOffset;
    float right = x + xOffset;
    float bottom = y + yOffset;
    canvas.drawRect(left, top, right, bottom, mBoxPaint);
    canvas.drawBitmap(op, left, top, new Paint());
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Draws the face annotations for position, size, and ID on the supplied canvas.
 */
@Override
public void draw(Canvas canvas) {
    Face face = mFace;
    if (face == null) {
        return;
    }
    float cx = translateX(face.getPosition().x + face.getWidth() / 2);
    if (cx > Constants.OFFSET_HEAD) {
        documentIdentifier.setFaceSide(Constants.FACE_RIGHT);
        Log.e("FACE ", "toRight");
    } else {
        documentIdentifier.setFaceSide(Constants.FACE_LEFT);
        Log.e("FACE ", "toLeft");
    }

}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Draws the face annotations for position on the supplied canvas.
 */
@Override
public void draw(Canvas canvas) {
    Face face = mFace;
    if (face == null) {
        return;
    }

    // Draws a circle at the position of the detected face, with the face's track id below.
    float x = translateX(face.getPosition().x + face.getWidth() / 2);
    float y = translateY(face.getPosition().y + face.getHeight() / 2);
    canvas.drawCircle(x, y, FACE_POSITION_RADIUS, mFacePositionPaint);
    canvas.drawText("id: " + mFaceId, x + ID_X_OFFSET, y + ID_Y_OFFSET, mIdPaint);
    canvas.drawText("happiness: " + String.format("%.2f", face.getIsSmilingProbability()), x - ID_X_OFFSET, y - ID_Y_OFFSET, mIdPaint);
    canvas.drawText("right eye: " + String.format("%.2f", face.getIsRightEyeOpenProbability()), x + ID_X_OFFSET * 2, y + ID_Y_OFFSET * 2, mIdPaint);
    canvas.drawText("left eye: " + String.format("%.2f", face.getIsLeftEyeOpenProbability()), x - ID_X_OFFSET*2, y - ID_Y_OFFSET*2, mIdPaint);

    // Draws a bounding box around the face.
    float xOffset = scaleX(face.getWidth() / 2.0f);
    float yOffset = scaleY(face.getHeight() / 2.0f);
    float left = x - xOffset;
    float top = y - yOffset;
    float right = x + xOffset;
    float bottom = y + yOffset;
    canvas.drawRect(left, top, right, bottom, mBoxPaint);
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * drawFaceBox(Canvas canvas, double scale)方法会更有趣，被检测到人脸数据以位置信息的方式存储到mFaces中，
 * 这个方法将基于这些位置数据中的宽、高在检测到的人脸位置画一个绿色的矩形框。
 你需要定义自己的绘画对象，然后从你的SparseArray数组中循环的找出位置、高度和宽度信息，再利用这些信息在画布上画出矩形。
 */

private void drawFaceBox(Canvas canvas, double scale){
      //新建画笔
    Paint paint =new Paint();
    paint.setColor(Color.BLUE);
    paint.setStrokeWidth(5);
    paint.setStyle(Paint.Style.STROKE);

    float left =0;
    float top=0;
    float right=0;
    float bottom=0;

    for(int i=0;i<mFaces.size();i++){
        Face face =mFaces.get(i);
        left = (float)scale*face.getPosition().x;
        top  =(float)scale*face.getPosition().y;
        right = (float) scale * ( face.getPosition().x + face.getWidth() );
        bottom = (float) scale * ( face.getPosition().y + face.getHeight() );

        canvas.drawRect( left, top, right, bottom, paint );
    }
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Method to drawing on faces
 */
private Bitmap drawOnFace(SparseArray<Face> faceArray, Bitmap photo, int stroke, int color){
    Bitmap outBitmap = Bitmap.createBitmap(photo.getWidth(), photo.getHeight(), Bitmap.Config.RGB_565);
    Canvas canvas = new Canvas(outBitmap);
    canvas.drawBitmap(photo, 0, 0, null);

    for(int i=0; i < faceArray.size(); i++){
        int key = faceArray.keyAt(i);
        // get the object by the key.
        Face face = faceArray.get(key);
        //Drawing rectangle on each face
        drawRectangle(canvas, face.getPosition(), face.getWidth(), face.getHeight(),stroke,color);
        this.faceRecognitionInformation.setListLandMarkPhoto(face.getLandmarks());
    }
    return outBitmap;
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
public void setDetector(){
    FaceDetector detector = new FaceDetector.Builder(this)
            .setTrackingEnabled(true)
            .setLandmarkType(FaceDetector.ALL_LANDMARKS)
            .setMode(FaceDetector.ACCURATE_MODE)
            .build();


    Detector<Face> safeDetector = new SafeFaceDetector(detector);

    if (!safeDetector.isOperational()) {
        Toast.makeText(this, "Detector are having issues", Toast.LENGTH_LONG).show();
    } else {
        Frame frame = new Frame.Builder().setBitmap(mbitmap).build();
        mFaces = safeDetector.detect(frame);
        safeDetector.release();
    }

}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Draws a small circle for each detected landmark, centered at the detected landmark position.
 * <p>
 *
 * Note that eye landmarks are defined to be the midpoint between the detected eye corner
 * positions, which tends to place the eye landmarks at the lower eyelid rather than at the
 * pupil position.
 */
private void drawFaceAnnotations(Canvas canvas, double scale) {
    Paint paint = new Paint();
    paint.setColor(Color.GREEN);
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth(5);

    for (int i = 0; i < mFaces.size(); ++i) {
        Face face = mFaces.valueAt(i);
        for (Landmark landmark : face.getLandmarks()) {
            int cx = (int) (landmark.getPosition().x * scale);
            int cy = (int) (landmark.getPosition().y * scale);
            canvas.drawCircle(cx, cy, 10, paint);
        }
    }
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Draws the face annotations for position, size, and ID on the supplied canvas.
 */
@Override
public void draw(Canvas canvas) {
    Face face = mFace;
    if (face == null) {
        return;
    }

    // Draws a circle at the position of the detected face, with the face's track id below.
    float cx = translateX(face.getPosition().x + face.getWidth() / 2);
    float cy = translateY(face.getPosition().y + face.getHeight() / 2);
    canvas.drawCircle(cx, cy, FACE_POSITION_RADIUS, mFacePositionPaint);
    canvas.drawText("id: " + getId(), cx + ID_X_OFFSET, cy + ID_Y_OFFSET, mIdPaint);

    // Draws an oval around the face.
    float xOffset = scaleX(face.getWidth() / 2.0f);
    float yOffset = scaleY(face.getHeight() / 2.0f);
    float left = cx - xOffset;
    float top = cy - yOffset;
    float right = cx + xOffset;
    float bottom = cy + yOffset;
    canvas.drawOval(left, top, right, bottom, mBoxPaint);
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Draws the face annotations for position on the supplied canvas.
 */
@Override
public void draw(Canvas canvas) {
    Face face = mFace;
    if (face == null) {
        return;
    }

    // Draws a circle at the position of the detected face, with the face's track id below.
    float x = translateX(face.getPosition().x + face.getWidth() / 2);
    float y = translateY(face.getPosition().y + face.getHeight() / 2);



    // Draws a bounding box around the face.
    float xOffset = scaleX(face.getWidth() / 2.0f);
    float yOffset = scaleY(face.getHeight() / 2.0f);
    float left = x - xOffset;
    float top = y - yOffset;
    float right = x + xOffset;
    float bottom = y + yOffset;

    canvas.drawText(mIsReady ? mReadyMessage : mNotReadyMessage, left, top - LABEL_Y_OFFSET, mPaint);

    canvas.drawRect(left, top, right, bottom, mPaint);
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Draws the face annotations for position on the supplied canvas.
 */
@Override
public void draw(Canvas canvas) {
    Face face = mFace;
    if (face == null) {
        return;
    }

    // Draws a circle at the position of the detected face, with the face's track id below.
    float x = translateX(face.getPosition().x + face.getWidth() / 2);
    float y = translateY(face.getPosition().y + face.getHeight() / 2);
    canvas.drawCircle(x, y, FACE_POSITION_RADIUS, mFacePositionPaint);
    canvas.drawText("id: " + mFaceId, x + ID_X_OFFSET, y + ID_Y_OFFSET, mIdPaint);

    // Draws a bounding box around the face.
    float xOffset = scaleX(face.getWidth() / 2.0f);
    float yOffset = scaleY(face.getHeight() / 2.0f);
    float left = x - xOffset;
    float top = y - yOffset;
    float right = x + xOffset;
    float bottom = y + yOffset;
    canvas.drawRect(left, top, right, bottom, mBoxPaint);
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Finds a specific landmark position, or approximates the position based on past observations
 * if it is not present.
 */
private PointF getLandmarkPosition(Face face, int landmarkId) {
    for (Landmark landmark : face.getLandmarks()) {
        if (landmark.getType() == landmarkId) {
            return landmark.getPosition();
        }
    }

    PointF prop = mPreviousProportions.get(landmarkId);
    if (prop == null) {
        return null;
    }

    float x = face.getPosition().x + (prop.x * face.getWidth());
    float y = face.getPosition().y + (prop.y * face.getHeight());
    return new PointF(x, y);
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
private Optional<Face> findLargestFace(Bitmap inputImage) {
final FaceDetector detector = createDetector();
      final SparseArray<Face> faces = detector.detect(new Frame.Builder().setBitmap(inputImage).build());

      Face largestFace = null;
float largestSize = 0f;
Timber.d("found " + faces.size() + " faces in photo");

      for (int i = 0; i < faces.size(); ++i) {
          final Face face = faces.valueAt(i);
	final float faceSize = face.getHeight() * face.getWidth();
	if (faceSize > largestSize) {
		largestFace = face;
		largestSize = faceSize;
	}
      }

detector.release();
return Optional.fromNullable(largestFace);
  }
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
/**
 * Updates the face instance from the detection of the most recent frame.  Invalidates the
 * relevant portions of the overlay to trigger a redraw.
 */
void updateFace(Face face) {
    mFace = face;
    op = Bitmap.createScaledBitmap(bitmap, (int) scaleX(face.getWidth()),
            (int) scaleY(((bitmap.getHeight() * face.getWidth()) / bitmap.getWidth())), false);
    postInvalidate();
}
 

import com.google.android.gms.vision.face.Face; //导入依赖的package包/类
private int getFaceCount(@NonNull Bitmap img) {
    Frame frame = new Frame.Builder()
            .setBitmap(img)
            .build();

    SparseArray<Face> faces = detector.detect(frame);
    log.d("%d faces detected within image %s", faces.size(), img);

    return faces.size();
}