Real transform

src/test/java/net/imagej/ops/transform/realTransform/RealTransformTest.java

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+/*-
+ * #%L
+ * ImageJ software for multidimensional image processing and analysis.
+ * %%
+ * Copyright (C) 2014 - 2018 ImageJ developers.
+ * %%
+ * Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+ * #L%
+ */
+
+package net.imagej.ops.transform.realTransform;
+
+import static org.junit.Assert.assertEquals;
+
+import net.imagej.ops.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;
+
+import org.junit.Test;
+
+public class RealTransformTest extends AbstractOpTest {
+
+	@Test
+	public void regressionTest() throws Exception {
+
+		final Img<UnsignedByteType> image = openUnsignedByteType(getClass(),
+			"lowresbridge.tif");
+		final Img<UnsignedByteType> expectedOutput = openUnsignedByteType(
+			getClass(), "rotatedscaledcenter.tif");
+
+		final AffineTransform2D transform = new AffineTransform2D();
+
+		transform.translate(-image.dimension(0) / 2, -image.dimension(0) / 2);
+		transform.rotate(1);
+		transform.scale(0.5);
+		transform.translate(image.dimension(0) / 2, image.dimension(0) / 2);
+
+		final RandomAccessibleInterval<UnsignedByteType> actualOutput = ops
+			.transform().realTransform(image, transform);
+
+		// 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);
+		}
+
+	}
+
+}