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Methods for the extraction of low-level image features, including global image features and pixel/patch classification models.

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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.contour;

import java.util.ArrayList;
import java.util.List;

import org.openimaj.image.MBFImage;
import org.openimaj.image.colour.RGBColour;
import org.openimaj.image.renderer.MBFImageRenderer;

/**
 * {@link MBFImageRenderer} for drawing {@link Contour}s.
 * 
 * @author Sina Samnagooei ([email protected])
 * 
 */
public class ContourRenderer extends MBFImageRenderer {

	/**
	 * Construct with the given target image.
	 * 
	 * @param targetImage
	 *            the target image
	 */
	public ContourRenderer(MBFImage targetImage) {
		super(targetImage);
	}

	/**
	 * Utility function to quickly draw the contour to the image.
	 * 
	 * @param imgC
	 *            the target image
	 * @param root
	 *            the contour
	 * @return the target image
	 */
	public static MBFImage drawContours(MBFImage imgC, Contour root) {
		new ContourRenderer(imgC).drawContours(root);
		return imgC;
	}

	/**
	 * Draw the given contour.
	 * 
	 * @param root
	 *            the contour.
	 */
	public void drawContours(Contour root) {
		final List toDraw = new ArrayList();
		toDraw.add(root);
		while (!toDraw.isEmpty()) {
			final Contour next = toDraw.remove(toDraw.size() - 1);
			Float[] c = null;
			switch (next.type) {
			case HOLE:
				c = RGBColour.BLUE;
				break;
			case OUTER:
				c = RGBColour.RED;
				break;
			}
			this.drawShape(next, 3, c);

			toDraw.addAll(next.children);
		}
	}
}