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| 1 | +/* |
| 2 | + * #%L |
| 3 | + * Image processing operations for SciJava Ops. |
| 4 | + * %% |
| 5 | + * Copyright (C) 2014 - 2025 SciJava developers. |
| 6 | + * %% |
| 7 | + * Redistribution and use in source and binary forms, with or without |
| 8 | + * modification, are permitted provided that the following conditions are met: |
| 9 | + * |
| 10 | + * 1. Redistributions of source code must retain the above copyright notice, |
| 11 | + * this list of conditions and the following disclaimer. |
| 12 | + * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 13 | + * this list of conditions and the following disclaimer in the documentation |
| 14 | + * and/or other materials provided with the distribution. |
| 15 | + * |
| 16 | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 17 | + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE |
| 20 | + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 23 | + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 24 | + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 25 | + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 26 | + * POSSIBILITY OF SUCH DAMAGE. |
| 27 | + * #L% |
| 28 | + */ |
| 29 | +// |
| 30 | + |
| 31 | +package org.scijava.ops.image.filter.correlate; |
| 32 | + |
| 33 | +import net.imglib2.RandomAccessibleInterval; |
| 34 | +import net.imglib2.img.array.ArrayImgs; |
| 35 | +import net.imglib2.type.numeric.complex.ComplexFloatType; |
| 36 | +import net.imglib2.type.numeric.real.FloatType; |
| 37 | +import org.junit.jupiter.api.Assertions; |
| 38 | +import org.junit.jupiter.api.Test; |
| 39 | +import org.scijava.ops.image.AbstractOpTest; |
| 40 | + |
| 41 | +import java.util.Arrays; |
| 42 | + |
| 43 | +/** |
| 44 | + * Tests for {@code filter.correlate} Ops |
| 45 | + * |
| 46 | + * @author Gabriel Selzer |
| 47 | + */ |
| 48 | +public class CorrelateTest extends AbstractOpTest { |
| 49 | + |
| 50 | + @Test |
| 51 | + public void testCorrelate() { |
| 52 | + // Create an image with the center pixel set |
| 53 | + var img = ArrayImgs.unsignedBytes(9, 9); |
| 54 | + var impulse = new long[] {4, 4}; |
| 55 | + img.randomAccess().setPositionAndGet(impulse).set(1); |
| 56 | + |
| 57 | + // Create an identity kernel |
| 58 | + var kernel = ArrayImgs.unsignedBytes(5, 5); |
| 59 | + kernel.getAt(2, 2).set(1); |
| 60 | + |
| 61 | + // Correlate with Ops |
| 62 | + var output = ops.op("filter.correlate").input(img, kernel, new FloatType(), new ComplexFloatType()).apply(); |
| 63 | + Assertions.assertInstanceOf(RandomAccessibleInterval.class, output); |
| 64 | + var actual = (RandomAccessibleInterval<FloatType>) output; |
| 65 | + |
| 66 | + // Check the result |
| 67 | + var cursor = actual.cursor(); |
| 68 | + while (cursor.hasNext()) { |
| 69 | + var actualValue = cursor.next().get(); |
| 70 | + var pos = cursor.positionAsLongArray(); |
| 71 | + // The only pixel that should be set is the center pixel. |
| 72 | + var expected = Arrays.equals(impulse, pos) ? 1 : 0; |
| 73 | + Assertions.assertEquals(expected, actualValue, 1e-6); |
| 74 | + } |
| 75 | + } |
| 76 | +} |
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