org.openimaj.image.saliency.LuoTangSubjectRegion Maven / Gradle / Ivy
Show all versions of image-feature-extraction Show documentation
/**
* 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.saliency;
import org.openimaj.citation.annotation.Reference;
import org.openimaj.citation.annotation.ReferenceType;
import org.openimaj.image.FImage;
import org.openimaj.image.analysis.algorithm.HorizontalProjection;
import org.openimaj.image.analysis.algorithm.VerticalProjection;
import org.openimaj.math.geometry.shape.Rectangle;
/**
* Extract the subject region of an image based on the
* part that is least blurred (most in-focus).
*
* Algorithm based on:
* Yiwen Luo and Xiaoou Tang. 2008.
* Photo and Video Quality Evaluation: Focusing on the Subject.
* In Proceedings of the 10th European Conference on Computer Vision:
* Part III (ECCV '08), David Forsyth, Philip Torr, and Andrew Zisserman (Eds.).
* Springer-Verlag, Berlin, Heidelberg, 386-399. DOI=10.1007/978-3-540-88690-7_29
* http://dx.doi.org/10.1007/978-3-540-88690-7_29
*
* Note that this is not scale invariant - you will get different results with
* different sized images...
*
* @author Jonathon Hare ([email protected])
*/
@Reference(
type = ReferenceType.Inproceedings,
author = { "Luo, Yiwen", "Tang, Xiaoou" },
title = "Photo and Video Quality Evaluation: Focusing on the Subject",
year = "2008",
booktitle = "Proceedings of the 10th European Conference on Computer Vision: Part III",
pages = { "386", "", "399" },
url = "http://dx.doi.org/10.1007/978-3-540-88690-7_29",
publisher = "Springer-Verlag",
series = "ECCV '08",
customData = {
"isbn", "978-3-540-88689-1",
"location", "Marseille, France",
"numpages", "14",
"doi", "10.1007/978-3-540-88690-7_29",
"acmid", "1478204",
"address", "Berlin, Heidelberg"
}
)
public class LuoTangSubjectRegion implements SaliencyMapGenerator {
DepthOfFieldEstimator dofEstimator;
Rectangle roi;
private FImage dofMap;
private float alpha = 0.9f;
/**
* Construct with default values for the {@link DepthOfFieldEstimator}
* and an alpha parameter of 0.9.
*/
public LuoTangSubjectRegion() {
dofEstimator = new DepthOfFieldEstimator();
}
/**
* Construct with the given parameters.
* @param alpha the alpha value.
* @param maxKernelSize Maximum kernel size for the {@link DepthOfFieldEstimator}.
* @param kernelSizeStep Kernel step size for the {@link DepthOfFieldEstimator}.
* @param nbins Number of bins for the {@link DepthOfFieldEstimator}.
* @param windowSize window size for the {@link DepthOfFieldEstimator}.
*/
public LuoTangSubjectRegion(float alpha, int maxKernelSize, int kernelSizeStep, int nbins, int windowSize) {
this.dofEstimator = new DepthOfFieldEstimator(maxKernelSize, kernelSizeStep, nbins, windowSize);
this.alpha = alpha;
}
/* (non-Javadoc)
* @see org.openimaj.image.analyser.ImageAnalyser#analyseImage(org.openimaj.image.Image)
*/
@Override
public void analyseImage(FImage image) {
image.analyseWith(dofEstimator);
dofMap = dofEstimator.getSaliencyMap();
for (int y=0; y