Java Code Examples for com.google.android.gms.vision.face.Landmark#getPosition()

/** Given a face and a facial landmark position,
 *  return the coordinates of the landmark if known,
 *  or approximated coordinates (based on prior data) if not.
 */
private PointF getLandmarkPosition(Face face, int landmarkId) {
    for (Landmark landmark : face.getLandmarks()) {
        if (landmark.getType() == landmarkId) {
            return landmark.getPosition();
        }
    }

    PointF landmarkPosition = mPreviousLandmarkPositions.get(landmarkId);
    if (landmarkPosition == null) {
        return null;
    }

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

private void drawFaceLandmarks( 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 );
        }
    }
}
 

/**
 * 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);
}
 

/**
 * 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);
        }
    }
}
 

private void drawFaceLandmarks( 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 );
        }

    }
}
 

private void updatePreviousLandmarkPositions(Face face) {
    for (Landmark landmark : face.getLandmarks()) {
        PointF position = landmark.getPosition();
        float xProp = (position.x - face.getPosition().x) / face.getWidth();
        float yProp = (position.y - face.getPosition().y) / face.getHeight();
        mPreviousLandmarkPositions.put(landmark.getType(), new PointF(xProp, yProp));
    }
}
 

private void updatePreviousProportions(Face face) {
    for (Landmark landmark : face.getLandmarks()) {
        PointF position = landmark.getPosition();
        float xProp = (position.x - face.getPosition().x) / face.getWidth();
        float yProp = (position.y - face.getPosition().y) / face.getHeight();
        mPreviousProportions.put(landmark.getType(), new PointF(xProp, yProp));
    }
}
 

public PhotoFace(Face face, Bitmap sourceBitmap, Size targetSize, boolean sideward) {
    List<Landmark> landmarks = face.getLandmarks();

    Point leftEyePoint = null;
    Point rightEyePoint = null;

    Point leftMouthPoint = null;
    Point rightMouthPoint = null;

    for (Landmark landmark : landmarks) {
        PointF point = landmark.getPosition();

        switch (landmark.getType()) {
            case Landmark.LEFT_EYE: {
                leftEyePoint = transposePoint(point, sourceBitmap, targetSize, sideward);
            }
            break;

            case Landmark.RIGHT_EYE: {
                rightEyePoint = transposePoint(point, sourceBitmap, targetSize, sideward);
            }
            break;

            case Landmark.LEFT_MOUTH: {
                leftMouthPoint = transposePoint(point, sourceBitmap, targetSize, sideward);
            }
            break;

            case Landmark.RIGHT_MOUTH: {
                rightMouthPoint = transposePoint(point, sourceBitmap, targetSize, sideward);
            }
            break;
        }
    }

    if (leftEyePoint != null && rightEyePoint != null) {
        eyesCenterPoint = new Point(0.5f * leftEyePoint.x + 0.5f * rightEyePoint.x,
                0.5f * leftEyePoint.y + 0.5f * rightEyePoint.y);
        eyesDistance = (float)Math.hypot(rightEyePoint.x - leftEyePoint.x, rightEyePoint.y - leftEyePoint.y);
        angle = (float)Math.toDegrees(Math.PI + Math.atan2(rightEyePoint.y - leftEyePoint.y, rightEyePoint.x - leftEyePoint.x));

        width = eyesDistance * 2.35f;

        float foreheadHeight = 0.8f * eyesDistance;
        float upAngle = (float)Math.toRadians(angle - 90);
        foreheadPoint = new Point(eyesCenterPoint.x + foreheadHeight * (float)Math.cos(upAngle),
                eyesCenterPoint.y + foreheadHeight * (float)Math.sin(upAngle));
    }

    if (leftMouthPoint != null && rightMouthPoint != null) {
        mouthPoint = new Point(0.5f * leftMouthPoint.x + 0.5f * rightMouthPoint.x,
                0.5f * leftMouthPoint.y + 0.5f * rightMouthPoint.y);

        float chinDepth = 0.7f * eyesDistance;
        float downAngle = (float)Math.toRadians(angle + 90);
        chinPoint = new Point(mouthPoint.x + chinDepth * (float)Math.cos(downAngle),
                mouthPoint.y + chinDepth * (float)Math.sin(downAngle));
    }
}
 

public PhotoFace(Face face, Bitmap sourceBitmap, Size targetSize, boolean sideward) {
    List<Landmark> landmarks = face.getLandmarks();

    Point leftEyePoint = null;
    Point rightEyePoint = null;

    Point leftMouthPoint = null;
    Point rightMouthPoint = null;

    for (Landmark landmark : landmarks) {
        PointF point = landmark.getPosition();

        switch (landmark.getType()) {
            case Landmark.LEFT_EYE: {
                leftEyePoint = transposePoint(point, sourceBitmap, targetSize, sideward);
            }
            break;

            case Landmark.RIGHT_EYE: {
                rightEyePoint = transposePoint(point, sourceBitmap, targetSize, sideward);
            }
            break;

            case Landmark.LEFT_MOUTH: {
                leftMouthPoint = transposePoint(point, sourceBitmap, targetSize, sideward);
            }
            break;

            case Landmark.RIGHT_MOUTH: {
                rightMouthPoint = transposePoint(point, sourceBitmap, targetSize, sideward);
            }
            break;
        }
    }

    if (leftEyePoint != null && rightEyePoint != null) {
        eyesCenterPoint = new Point(0.5f * leftEyePoint.x + 0.5f * rightEyePoint.x,
                0.5f * leftEyePoint.y + 0.5f * rightEyePoint.y);
        eyesDistance = (float)Math.hypot(rightEyePoint.x - leftEyePoint.x, rightEyePoint.y - leftEyePoint.y);
        angle = (float)Math.toDegrees(Math.PI + Math.atan2(rightEyePoint.y - leftEyePoint.y, rightEyePoint.x - leftEyePoint.x));

        width = eyesDistance * 2.35f;

        float foreheadHeight = 0.8f * eyesDistance;
        float upAngle = (float)Math.toRadians(angle - 90);
        foreheadPoint = new Point(eyesCenterPoint.x + foreheadHeight * (float)Math.cos(upAngle),
                eyesCenterPoint.y + foreheadHeight * (float)Math.sin(upAngle));
    }

    if (leftMouthPoint != null && rightMouthPoint != null) {
        mouthPoint = new Point(0.5f * leftMouthPoint.x + 0.5f * rightMouthPoint.x,
                0.5f * leftMouthPoint.y + 0.5f * rightMouthPoint.y);

        float chinDepth = 0.7f * eyesDistance;
        float downAngle = (float)Math.toRadians(angle + 90);
        chinPoint = new Point(mouthPoint.x + chinDepth * (float)Math.cos(downAngle),
                mouthPoint.y + chinDepth * (float)Math.sin(downAngle));
    }
}
 

@Override
public void detect(
        SharedBufferHandle frameData, int width, int height, DetectResponse callback) {
    // The vision library will be downloaded the first time the API is used
    // on the device; this happens "fast", but it might have not completed,
    // bail in this case.
    if (!mFaceDetector.isOperational()) {
        Log.e(TAG, "FaceDetector is not operational");

        // Fallback to Android's FaceDetectionImpl.
        FaceDetectorOptions options = new FaceDetectorOptions();
        options.fastMode = mFastMode;
        options.maxDetectedFaces = mMaxFaces;
        FaceDetectionImpl detector = new FaceDetectionImpl(options);
        detector.detect(frameData, width, height, callback);
        return;
    }

    Frame frame = SharedBufferUtils.convertToFrame(frameData, width, height);
    if (frame == null) {
        Log.e(TAG, "Error converting SharedMemory to Frame");
        callback.call(new FaceDetectionResult[0]);
        return;
    }

    final SparseArray<Face> faces = mFaceDetector.detect(frame);

    FaceDetectionResult[] faceArray = new FaceDetectionResult[faces.size()];
    for (int i = 0; i < faces.size(); i++) {
        faceArray[i] = new FaceDetectionResult();
        final Face face = faces.valueAt(i);

        final PointF corner = face.getPosition();
        faceArray[i].boundingBox = new RectF();
        faceArray[i].boundingBox.x = corner.x;
        faceArray[i].boundingBox.y = corner.y;
        faceArray[i].boundingBox.width = face.getWidth();
        faceArray[i].boundingBox.height = face.getHeight();

        final List<Landmark> landmarks = face.getLandmarks();
        ArrayList<org.chromium.shape_detection.mojom.Landmark> mojoLandmarks =
                new ArrayList<org.chromium.shape_detection.mojom.Landmark>(landmarks.size());

        for (int j = 0; j < landmarks.size(); j++) {
            final Landmark landmark = landmarks.get(j);
            final int landmarkType = landmark.getType();
            if (landmarkType == Landmark.LEFT_EYE || landmarkType == Landmark.RIGHT_EYE
                    || landmarkType == Landmark.BOTTOM_MOUTH) {
                org.chromium.shape_detection.mojom.Landmark mojoLandmark =
                        new org.chromium.shape_detection.mojom.Landmark();
                mojoLandmark.location = new org.chromium.gfx.mojom.PointF();
                mojoLandmark.location.x = landmark.getPosition().x;
                mojoLandmark.location.y = landmark.getPosition().y;
                mojoLandmark.type = landmarkType == Landmark.BOTTOM_MOUTH ? LandmarkType.MOUTH
                                                                          : LandmarkType.EYE;
                mojoLandmarks.add(mojoLandmark);
            }
        }
        faceArray[i].landmarks = mojoLandmarks.toArray(
                new org.chromium.shape_detection.mojom.Landmark[mojoLandmarks.size()]);
    }
    callback.call(faceArray);
}