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 * Image processing operations for SciJava Ops.
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package org.scijava.ops.image.features.zernike;

import static org.junit.jupiter.api.Assertions.assertEquals;

import org.scijava.ops.image.AbstractFeatureTest;
import net.imglib2.type.numeric.real.DoubleType;

import org.junit.jupiter.api.Test;
import org.scijava.types.Nil;

/**
 * Test {@Link ZernikeFeature}
 *
 * @author Andreas Graumann (University of Konstanz)
 */
public class ZernikeFeatureTest extends AbstractFeatureTest {

	private static final double EPSILON = 1e-12;

	@Test
	public void testPhaseFeature() {

		assertEquals(179.92297037263532, ops.op("features.zernike.phase").input(
			ellipse, 4, 2).outType(new Nil<DoubleType>()
		{}).apply().get(), EPSILON, "features.zernike.phase");
		assertEquals(0.0802239034925816, ops.op("features.zernike.phase").input(
			rotatedEllipse, 4, 2).outType(new Nil<DoubleType>()
		{}).apply().get(), EPSILON, "features.zernike.phase");
	}

	@Test
	public void testMagnitudeFeature() {

		double v1 = ops.op("features.zernike.magnitude").input(ellipse, 4, 2)
			.outType(new Nil<DoubleType>()
			{}).apply().get();
		double v2 = ops.op("features.zernike.magnitude").input(rotatedEllipse, 4, 2)
			.outType(new Nil<DoubleType>()
			{}).apply().get();

		assertEquals(0.10985876611295191, v1, EPSILON,
			"features.zernike.magnitude");

		// magnitude is the same after rotating the image
		assertEquals(v1, v2, 1e-3, "features.zernike.magnitude");
	}

}
