org.openimaj.image.processing.morphology.SequentialThin Maven / Gradle / Ivy
/**
* 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
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package org.openimaj.image.processing.morphology;
import org.openimaj.image.FImage;
import org.openimaj.image.pixel.ConnectedComponent;
import org.openimaj.image.processor.ImageProcessor;
import org.openimaj.image.processor.connectedcomponent.ConnectedComponentProcessor;
/**
* Morphological sequential thinning of connected components and (assumed binary) FImages.
*
* @author Jonathon Hare ([email protected])
*/
public class SequentialThin implements ConnectedComponentProcessor, ImageProcessor {
protected HitAndMiss hitAndMiss;
protected int niter = -1;
/**
* Construct the sequential thin operator with the given structuring elements
* @param se the structuring elements
*/
public SequentialThin(StructuringElement... se) {
this.hitAndMiss = new HitAndMiss(se);
}
/**
* Construct the sequential thin operator with the given structuring elements
* and number of iterations
* @param niter number of iterations to apply
* @param se the structuring elements
*/
public SequentialThin(int niter, StructuringElement... se) {
this.hitAndMiss = new HitAndMiss(se);
this.niter = niter;
}
@Override
public void process(ConnectedComponent cc) {
for (int i=niter; i!=0; i--) {
hitAndMiss.process(cc);
if (hitAndMiss.outputPixels.size() == 0)
break;
cc.getPixels().removeAll(hitAndMiss.outputPixels);
}
}
/* (non-Javadoc)
* @see org.openimaj.image.processor.ImageProcessor#processImage(org.openimaj.image.Image)
*/
@Override
public void processImage(FImage image) {
for (int i=niter; i!=0; i--) {
FImage newImage = image.process(hitAndMiss, true);
int count = 0;
for (int y=0; y