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desruisseaux pushed a commit to branch geoapi-4.0
in repository https://gitbox.apache.org/repos/asf/sis.git
The following commit(s) were added to refs/heads/geoapi-4.0 by this push:
new 63875de Add a test case for isolines on multi-banded image.
63875de is described below
commit 63875de64a0a420bc813d5b89acbf4deada6cdfc
Author: Martin Desruisseaux <[email protected]>
AuthorDate: Wed Dec 30 21:52:20 2020 +0100
Add a test case for isolines on multi-banded image.
---
.../internal/processing/image/IsolinesTest.java | 64 ++++++++++++++++++++++
1 file changed, 64 insertions(+)
diff --git
a/core/sis-feature/src/test/java/org/apache/sis/internal/processing/image/IsolinesTest.java
b/core/sis-feature/src/test/java/org/apache/sis/internal/processing/image/IsolinesTest.java
index aa528f6..85c8a58 100644
---
a/core/sis-feature/src/test/java/org/apache/sis/internal/processing/image/IsolinesTest.java
+++
b/core/sis-feature/src/test/java/org/apache/sis/internal/processing/image/IsolinesTest.java
@@ -185,6 +185,14 @@ public final strictfp class IsolinesTest extends TestCase {
0,0,0,
0,1,0,
0,0,0);
+ verifyIsolineFromMultiCells();
+ }
+
+ /**
+ * Verifies the result of {@link #testMultiCells()}.
+ * The shape to verify shall be stored in the {@link #isoline} field.
+ */
+ private void verifyIsolineFromMultiCells() {
/*
* Expected coordinates:
*
@@ -217,6 +225,62 @@ public final strictfp class IsolinesTest extends TestCase {
}
/**
+ * Tests isolines computed in a contouring grid having more than one band.
+ * The same values than {@link #testSingleCell()} are used.
+ *
+ * @throws TransformException if a point can not be transformed to its
final coordinate space.
+ */
+ @Test
+ public void testSingleCellMultiBands() throws TransformException {
+ final BufferedImage image = new BufferedImage(2, 2,
BufferedImage.TYPE_INT_RGB);
+ final WritableRaster raster = image.getRaster();
+ threshold = 2;
+ /*
+ * 0╌╌╌╌5▝ 1╌╌╌╌5▝ ▘11╌╌╌1
+ * ╎ ╎ ╎ ╎ ╎ ╎
+ * ▖10╌╌20▗ 0╌╌╌╌0 1╌╌╌╌5▗
+ */
+ raster.setPixel(0, 0, new int[] { 0, 1, 11});
+ raster.setPixel(1, 0, new int[] { 5, 5, 1});
+ raster.setPixel(0, 1, new int[] {10, 0, 1});
+ raster.setPixel(1, 1, new int[] {20, 0, 5});
+ final Isolines[] isolines = Isolines.generate(image, new double[][]
{{threshold}}, null);
+ assertEquals("Number of bands", 3, isolines.length);
+ for (int b=0; b<3; b++) {
+ final Map<Double, Shape> polylines = isolines[b].polylines();
+ assertEquals(1, polylines.size());
+ isoline = polylines.get(threshold);
+ switch (b) {
+ case 0: assertSegmentEquals(0, 0.2, 0.4, 0); break;
+ case 1: assertSegmentEquals(0.25, 0, 1, 0.6); break;
+ case 2: assertSegmentsEqual(0.9, 0, 1, 0.25,
+ 0, 0.9, 0.25, 1);
+ }
+ }
+ }
+
+ /**
+ * Tests isolines computed in a contouring grid having more than one band.
+ * The same values than {@link #testMultiCells()} are used, but it tests a
different
+ * code path because {@link Isolines} contains a special case for
one-banded image.
+ *
+ * @throws TransformException if a point can not be transformed to its
final coordinate space.
+ */
+ @Test
+ public void testMultiCellsMultiBands() throws TransformException {
+ final BufferedImage image = new BufferedImage(3, 3,
BufferedImage.TYPE_INT_RGB);
+ final WritableRaster raster = image.getRaster();
+ raster.setSample(1, 1, 1, 6);
+ threshold = 3;
+ final Isolines[] isolines = Isolines.generate(image, new double[][]
{{threshold}}, null);
+ assertEquals("Number of bands", 3, isolines.length);
+ assertTrue(isolines[0].polylines().isEmpty());
+ assertTrue(isolines[2].polylines().isEmpty());
+ isoline = isolines[1].polylines().get(threshold);
+ verifyIsolineFromMultiCells();
+ }
+
+ /**
* Tests a cell containing a NaN value.
*
* @throws TransformException if a point can not be transformed to its
final coordinate space.
