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Implementation of a flexible face-recognition pipeline,
including pluggable detectors, aligners, feature extractors
and recognisers.
/**
* Copyright (c) 2011, The University of Southampton and the individual contributors.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of the University of Southampton nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.openimaj.image.processing.face.detection;
import org.openimaj.image.FImage;
import org.openimaj.image.processing.transform.FProjectionProcessor;
import org.openimaj.math.geometry.shape.Ellipse;
import org.openimaj.math.geometry.shape.Shape;
import org.openimaj.math.geometry.transforms.TransformUtilities;
import Jama.Matrix;
/**
* An extension of a {@link DetectedFace} that represents the detection by an
* ellipse. The patch is extracted from the oriented bounding box surrounding
* the detection ellipse. The {@link Ellipse#getRotation()} is assumed to point
* towards the bottom of the face; this means a rotation of +pi/2 equates to an
* upright detection.
*
* @author Jonathon Hare ([email protected])
*
*/
public class EllipticalDetectedFace extends DetectedFace {
Ellipse ellipse;
/**
* Construct the {@link EllipticalDetectedFace} from the given parameters.
*
* @param ellipse
* the ellipse describing the location of the face in the image
* @param image
* the image in which the face was detected
* @param confidence
* the confidence of the detection
*/
public EllipticalDetectedFace(Ellipse ellipse, FImage image, float confidence) {
super();
this.ellipse = ellipse;
this.bounds = ellipse.calculateRegularBoundingBox();
this.confidence = confidence;
if (image != null)
this.facePatch = extractPatch(image, ellipse);
}
private FImage extractPatch(final FImage image, final Ellipse ellipse) {
final float x = ellipse.calculateCentroid().getX();
final float y = ellipse.calculateCentroid().getY();
final double major = ellipse.getMajor();
final double minor = ellipse.getMinor();
final Matrix rot = TransformUtilities.rotationMatrixAboutPoint(
-ellipse.getRotation() + Math.PI / 2,
x,
y);
final Matrix translate = TransformUtilities.translateMatrix(-(x - minor), -(y - major));
final Matrix tf = translate.times(rot);
final FProjectionProcessor pp = new FProjectionProcessor();
pp.setMatrix(tf);
pp.accumulate(image);
return pp.performProjection(0, (int) (2 * minor), 0, (int) (2 * major));
}
@Override
public Shape getShape() {
return ellipse;
}
}