boofcv.alg.feature.dense.impl.DescribeDenseHogAlg_PLU8 Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of feature Show documentation

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

The newest version!

/*
 * 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.feature.dense.impl;

import boofcv.alg.feature.dense.DescribeDenseHogAlg;
import boofcv.struct.image.*;

import javax.annotation.Generated;

/**
 * Implementation pf {@link DescribeDenseHogAlg} for {@link GrayF32}.
 *
 * @author Peter Abeles
 */
@Generated("")
public class DescribeDenseHogAlg_PLU8 extends DescribeDenseHogAlg
		,Planar>
{
	int numBands;

	public DescribeDenseHogAlg_PLU8(int orientationBins, int widthCell, int widthBlock, int stepBlock, int numBands ) {
		super(orientationBins, widthCell, widthBlock,stepBlock, ImageType.pl(numBands,GrayU8.class));
		this.numBands = numBands;
	}

	@Override
	public void computeDerivative(int pixelIndex) {

		float maxDX=0,maxDY=0;
		float maxNorm = 0;

		for (int i = 0; i < numBands; i++) {
			float dx = derivX.bands[i].data[pixelIndex];
			float dy = derivY.bands[i].data[pixelIndex];

			float n = dx*dx + dy*dy;
			if( n > maxNorm ) {
				maxNorm = n;
				maxDX = dx;
				maxDY = dy;
			}
		}

		pixelDX = maxDX;
		pixelDY = maxDY;
	}
}