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 * Image processing operations for SciJava Ops.
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package org.scijava.ops.image.transform.realTransform;

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

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

import org.scijava.ops.image.AbstractOpTest;
import net.imglib2.Cursor;
import net.imglib2.RandomAccess;
import net.imglib2.RandomAccessibleInterval;
import net.imglib2.img.Img;
import net.imglib2.realtransform.AffineTransform2D;
import net.imglib2.type.numeric.integer.UnsignedByteType;
import net.imglib2.view.Views;

public class RealTransformTest extends AbstractOpTest {

	@Test
	public void testRealTransform() {
		final Img<UnsignedByteType> image = openRelativeUnsignedByteImg(getClass(),
			"lowresbridge.tif");
		final Img<UnsignedByteType> expectedOutput = openRelativeUnsignedByteImg(
			getClass(), "rotatedscaledcenter.tif");

		final AffineTransform2D transform = new AffineTransform2D();

		double translation = ((double) image.dimension(0) / 2);
		transform.translate(-translation, -translation);
		transform.rotate(1);
		transform.scale(0.5);
		transform.translate(translation, translation);

		var outType = new Nil<RandomAccessibleInterval<UnsignedByteType>>() {};
		var actualOutput = ops.op("transform.realTransform") //
			.input(image, transform) //
			.outType(outType) //
			.apply();

		// compare the output image data to that stored in the file.
		final Cursor<UnsignedByteType> cursor = Views.iterable(actualOutput)
			.localizingCursor();
		final RandomAccess<UnsignedByteType> actualRA = actualOutput.randomAccess();
		final RandomAccess<UnsignedByteType> expectedRA = expectedOutput
			.randomAccess();

		while (cursor.hasNext()) {
			cursor.fwd();
			actualRA.setPosition(cursor);
			expectedRA.setPosition(cursor);
			assertEquals(expectedRA.get().get(), actualRA.get().get(), 0);
		}
	}
}
