ExampleTrackerObjectQuad.java

/*
 * Copyright (c) 2011-2013, Peter Abeles. All Rights Reserved.
 *
 * This file is part of BoofCV (http://boofcv.org).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package boofcv.examples.tracking;

import boofcv.abst.tracker.ConfigCirculantTracker;
import boofcv.abst.tracker.TrackerObjectQuad;
import boofcv.factory.tracker.FactoryTrackerObjectQuad;
import boofcv.gui.image.ShowImages;
import boofcv.gui.tracker.TrackerObjectQuadPanel;
import boofcv.io.MediaManager;
import boofcv.io.image.SimpleImageSequence;
import boofcv.io.wrapper.DefaultMediaManager;
import boofcv.misc.BoofMiscOps;
import boofcv.struct.image.ImageType;
import boofcv.struct.image.ImageUInt8;
import georegression.struct.shapes.Quadrilateral_F64;

import java.awt.*;
import java.awt.image.BufferedImage;

/**
 * Demonstration on how to use the high level {@link TrackerObjectQuad} interface for tracking objects in a
 * video sequence.  This interface allows the target to be specified using an arbitrary quadrilateral.  Specific
 * implementations might not support that shape, so they instead will track an approximation of it.  The
 * interface also allows information on target visibility to be returned.  As is usually the case, tracker
 * specific information is lost in the high level interface and you should consider using the trackers
 * directly if more control is needed.
 *
 * This is an active area of research and all of the trackers eventually diverge given a long enough sequence.
 *
 * @author Peter Abeles
 */
public class ExampleTrackerObjectQuad {

	public static void main(String[] args) {
		MediaManager media = DefaultMediaManager.INSTANCE;
		String fileName = "../data/applet/tracking/track_book.mjpeg";

		SimpleImageSequence<ImageUInt8> video = media.openVideo(fileName, ImageType.single(ImageUInt8.class));

		// Create the tracker.  Comment/Uncomment to change the tracker.  Mean-shift trackers have been omitted
		// from the list since they use color information and including color images could clutter up the example.
		TrackerObjectQuad<ImageUInt8> tracker =
				FactoryTrackerObjectQuad.circulant(new ConfigCirculantTracker(), ImageUInt8.class);
//				FactoryTrackerObjectQuad.sparseFlow(new SfotConfig<ImageUInt8, ImageUInt16>(ImageUInt8.class));
//				FactoryTrackerObjectQuad.tld(null,ImageUInt8.class);

		// specify the target's initial location and initialize with the first frame
		Quadrilateral_F64 location = new Quadrilateral_F64(276,159,362,163,358,292,273,289);
		ImageUInt8 frame = video.next();
		tracker.initialize(frame,location);

		// For displaying the results
		TrackerObjectQuadPanel gui = new TrackerObjectQuadPanel(null);
		gui.setPreferredSize(new Dimension(frame.getWidth(),frame.getHeight()));
		gui.setBackGround((BufferedImage)video.getGuiImage());
		gui.setTarget(location,true);
		ShowImages.showWindow(gui,"Tracking Results");

		// Track the object across each video frame and display the results
		while( video.hasNext() ) {
			frame = video.next();

			boolean visible = tracker.process(frame,location);

			gui.setBackGround((BufferedImage) video.getGuiImage());
			gui.setTarget(location,visible);
			gui.repaint();

			BoofMiscOps.pause(20);
		}
	}
}