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Implementation of a flexible face-recognition pipeline, including pluggable detectors, aligners, feature extractors and recognisers.

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/**
 * 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.alignment;

import org.openimaj.image.FImage;
import org.openimaj.image.processing.face.detection.DetectedFace;
import org.openimaj.io.ReadWriteableBinary;

/**
 * A FaceAligner produces aligned face patches (i.e. with the eyes aligned or
 * more). These can be used for building features for recognition, etc.
 * 
 * @author Jonathon Hare ([email protected])
 * @param 
 *            the type of {@link DetectedFace}
 * 
 */
public interface FaceAligner extends ReadWriteableBinary {
	/**
	 * For the provided face detection, return an aligned version of the face.
	 * 
	 * @param face
	 *            the face to align
	 * @return aligned face
	 */
	public FImage align(T face);

	/**
	 * Return a mask image for aligned faces. 0 pixels mark background pixels
	 * that should be ignored in further processing of aligned faces produced by
	 * this aligner.
	 * 
	 * @return a mask image, or null if masking isn't required
	 */
	public FImage getMask();
}