/*
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 * ImageJ software for multidimensional image processing and analysis.
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 * Copyright (C) 2014 - 2020 ImageJ developers.
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package net.imagej.ops.imagemoments.moments;

import net.imagej.ops.Op;
import net.imagej.ops.Ops;
import net.imagej.ops.imagemoments.AbstractImageMomentOp;
import net.imglib2.Cursor;
import net.imglib2.IterableInterval;
import net.imglib2.type.numeric.RealType;

import org.scijava.Priority;
import org.scijava.plugin.Plugin;

/**
 * {@link Op} to calculate the {@code imageMoments.moment01}.
 * 
 * @author Daniel Seebacher (University of Konstanz)
 * @author Christian Dietz (University of Konstanz)
 * @param <I> input type
 * @param <O> output type
 */
@Plugin(type = Ops.ImageMoments.Moment01.class, label = "Image Moment: Moment01",
	priority = Priority.VERY_HIGH)
public class DefaultMoment01<I extends RealType<I>, O extends RealType<O>>
	extends AbstractImageMomentOp<I, O> implements Ops.ImageMoments.Moment01
{

	@Override
	public void compute(final IterableInterval<I> input, final O output) {

		double moment01 = 0;

		final Cursor<I> cur = input.localizingCursor();
		while (cur.hasNext()) {
			cur.fwd();
			double y = cur.getDoublePosition(1);
			double val = cur.get().getRealDouble();
			moment01 += y * val;
		}

		output.setReal(moment01);
	}
}