boofcv.alg.tracker.klt.KltFeature Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of feature Show documentation
Show all versions of feature Show documentation
BoofCV is an open source Java library for real-time computer vision and robotics applications.
/*
* Copyright (c) 2011-2016, 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;
import boofcv.struct.image.GrayF32;
/**
* Contains feature information for {@link KltTracker}.
*
* @author Peter Abeles
*/
public class KltFeature {
/**
* Feature's location inside the image in pixels
*/
public float x, y;
/**
* The feature's size. Each feature is square with a width equal to its
* radius*2+1.
*/
public int radius;
/**
* Pixel intensity around the feature
*/
public GrayF32 desc;
/**
* Image derivative around the feature in the x-direction
*/
public GrayF32 derivX;
/**
* Image derivative around the feature in the y-direction
*/
public GrayF32 derivY;
/**
* spatial gradient matrix used in updating the feature's position
*/
public float Gxx, Gxy, Gyy;
public KltFeature(int radius) {
this.radius = radius;
int sideLength = radius * 2 + 1;
desc = new GrayF32(sideLength,sideLength);
derivX = new GrayF32(sideLength,sideLength);
derivY = new GrayF32(sideLength,sideLength);
}
public void setPosition(float x, float y) {
this.x = x;
this.y = y;
}
}