Example usage for org.opencv.core MatOfRect empty

Introduction

In this page you can find the example usage for org.opencv.core MatOfRect empty.

Prototype

public boolean empty() 

Source Link

Usage

From source file:ch.zhaw.facerecognitionlibrary.Helpers.FaceDetection.java

License:Open Source License

public Rect[] getFaces(Mat img) {
    MatOfRect faces = new MatOfRect();
    List<Rect> facesList = null;
    float mRelativeFaceSize = 0.2f;
    int mAbsoluteFaceSize = 0;
    if (faceDetector != null) {
        // If no face detected --> rotate the picture 90 and try again
        angle = 0;/*from ww  w .  j a  v a  2  s.  c o  m*/
        for (int i = 1; i <= 4; i++) {
            int height = img.rows();
            if (Math.round(height * mRelativeFaceSize) > 0) {
                mAbsoluteFaceSize = Math.round(height * mRelativeFaceSize);
            }
            faceDetector.detectMultiScale(img, faces, 1.1, 2, 2, new Size(mAbsoluteFaceSize, mAbsoluteFaceSize),
                    new Size());
            // Rotate by 90
            if (faces.empty()) {
                angle = 90 * i;
                MatOperation.rotate_90n(img, 90);
            } else {
                facesList = faces.toList();
                // Check that each found face rectangle fits in the image, if not, remove it
                for (Rect face : facesList) {
                    if (!(0 <= face.x && 0 <= face.width && face.x + face.width <= img.cols() && 0 <= face.y
                            && 0 <= face.height && face.y + face.height <= img.rows())) {
                        facesList.remove(face);
                    }
                }
                if (!(facesList.size() > 0)) {
                    return null;
                }
                // Faces found with the current image rotation
                this.img = img;
                break;
            }
        }

    } else {
        Log.e(TAG, "Detection method is not selected!");
    }
    if (facesList != null) {
        return (Rect[]) facesList.toArray();
    } else {
        return null;
    }
}

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From source file:ch.zhaw.facerecognitionlibrary.Helpers.FaceDetection.java

License:Open Source License

public Eyes getEyes(Mat img) {
    double halfWidth = img.cols() / 2;
    double height = img.rows();
    double[] values = new double[4];
    values[0] = 0;/*from w ww .  ja va2s.  c  om*/
    values[1] = 0;
    values[2] = halfWidth;
    values[3] = height;
    Rect rightHalf = new Rect(values);
    values[0] = halfWidth;
    Rect leftHalf = new Rect(values);
    MatOfRect rightEyes = new MatOfRect();
    MatOfRect leftEyes = new MatOfRect();

    Mat rightHalfImg = img.submat(rightHalf);
    rightEyeDetector.detectMultiScale(rightHalfImg, rightEyes);
    Mat leftHalfImg = img.submat(leftHalf);
    leftEyeDetector.detectMultiScale(leftHalfImg, leftEyes);

    if (rightEyes.empty() || leftEyes.empty() || rightEyes.toArray().length > 1
            || leftEyes.toArray().length > 1) {
        return null;
    }

    Rect rightEye = rightEyes.toArray()[0];
    Rect leftEye = leftEyes.toArray()[0];

    MatOfFloat rightPoint = new MatOfFloat(rightEye.x + rightEye.width / 2, rightEye.y + rightEye.height / 2);
    MatOfFloat leftPoint = new MatOfFloat(img.cols() / 2 + leftEye.x + leftEye.width / 2,
            leftEye.y + leftEye.height / 2);

    MatOfFloat diff = new MatOfFloat();
    Core.subtract(leftPoint, rightPoint, diff);
    double angle = Core.fastAtan2(diff.toArray()[1], diff.toArray()[0]);
    double dist = Core.norm(leftPoint, rightPoint, Core.NORM_L2);
    Eyes eyes = new Eyes(dist, rightPoint, leftPoint, angle);
    return eyes;
}

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From source file:frclib.FrcFaceDetector.java

License:Open Source License

/**
 * This method is called to detect objects in the image frame.
 *
 * @param image specifies the image to be processed.
 * @param detectedTargets specifies the preallocated buffer to hold the detected targets.
 * @param detectedObjects specifies the object rectangle array to hold the detected objects.
 * @return detected objects, null if none detected.
 */// www  . j  a v a 2  s .c  o m
@Override
public MatOfRect detectObjects(Mat image, MatOfRect detectedObjects) {
    final String funcName = "detectedObjects";

    if (debugEnabled) {
        dbgTrace.traceEnter(funcName, TrcDbgTrace.TraceLevel.CALLBK, "image=%s,objRects=%s", image.toString(),
                detectedObjects.toString());
    }

    faceDetector.detectMultiScale(image, detectedObjects);
    if (!detectedObjects.empty()) {
        faceRects = detectedObjects.toArray();
    } else {
        faceRects = null;
        detectedObjects = null;
    }

    if (videoOutEnabled) {
        putFrame();
    }

    currImage = image;

    if (debugEnabled) {
        dbgTrace.traceExit(funcName, TrcDbgTrace.TraceLevel.CALLBK, "=%s",
                Boolean.toString(detectedObjects != null));
    }

    return detectedObjects;
}

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