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BoofCV is an open source Java library for real-time computer vision and robotics applications.

There is a newer version: 1.1.7

/*
 * Copyright (c) 2011-2020, 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.alg.tracker.klt;

/**
 * Feature which is tracked by the {@link PyramidKltTracker}.  Each layer has its own feature description.
 *
 * @author Peter Abeles
 */
public class PyramidKltFeature {
	/** KLT feature description for each layer in the pyramid */
	public KltFeature[] desc;
	/** the feature's location in the original image */
	public float x,y;

	/** user specified data, not used by the tracker */
	public Object cookie;

	/**
	 * Configures the feature's description
	 *
	 * @param numLayers Number of layers inside the image pyramid
	 * @param radius Radius of the feature description in each layer
	 */
	public PyramidKltFeature(int numLayers, int radius) {
		desc = new KltFeature[numLayers];
		for (int i = 0; i < numLayers; i++) {
			desc[i] = new KltFeature(radius);
		}
	}

	public void checkUpdateLayers( int numLayers ) {
		if( desc.length != numLayers ) {
			int radius = desc[0].radius;
			desc = new KltFeature[numLayers];
			for (int i = 0; i < numLayers; i++) {
				desc[i] = new KltFeature(radius);
			}
		}
	}

	public void setPosition(float x, float y) {
		this.x = x;
		this.y = y;
	}

	public void setCookie(Object cookie) {
		this.cookie = cookie;
	}

	public  T getCookie() {
		return (T)cookie;
	}
}