/** Set up common objects used for all tests. */
@Before
public void setUp() {
coverage = EXAMPLES.get(0);
indexedCoverage = EXAMPLES.get(2);
indexedCoverageWithTransparency = EXAMPLES.get(3);
floatCoverage = EXAMPLES.get(4);
ushortCoverage = EXAMPLES.get(5);
Hints.putSystemDefault(Hints.RESAMPLE_TOLERANCE, 0.333);
}
/**
* Tests the "Multiply" operation.
*
* @throws IOException
*/
@Test
public void testMultiply() throws IOException {
final GridCoverage2D shortCoverage = EXAMPLES.get(5);
final GridCoverage2D floatCoverage = EXAMPLES.get(4);
final GridCoverage2D result = doOp("Multiply", shortCoverage, floatCoverage);
final RenderedImage image = result.getRenderedImage();
final RenderedImage extrema = ExtremaDescriptor.create(image, null, 1, 1, false, 1, null);
double[][] minMax = (double[][]) extrema.getProperty("Extrema");
assertEquals(minMax[0][0], 0.0, DELTA);
assertEquals(minMax[1][0], 6.5272192E7, DELTA);
}
@Test
public void testOptimizedWarp() throws Exception {
// do it again, make sure the image does not turn black since
GridCoverage2D ushortCoverage = EXAMPLES.get(5);
GridCoverage2D coverage =
project(ushortCoverage, CRS.parseWKT(GOOGLE_MERCATOR_WKT), null, "nearest", null, true);
RenderedImage ri = coverage.getRenderedImage();
ImageWorker.WARP_REDUCTION_ENABLED = false;
AffineTransform at = new AffineTransform(0.4, 0, 0, 0.5, -200, -200);
RenderedOp fullChain =
(RenderedOp)
new ImageWorker(ri)
.affine(
at, Interpolation.getInstance(Interpolation.INTERP_NEAREST), new double[] {0})
.getRenderedImage();
assertEquals("Scale", fullChain.getOperationName());
fullChain.getTiles();
ImageWorker.WARP_REDUCTION_ENABLED = true;
RenderedOp reduced =
(RenderedOp)
new ImageWorker(ri)
.affine(
at, Interpolation.getInstance(Interpolation.INTERP_NEAREST), new double[] {0})
.getRenderedImage();
// force computation, to make sure it does not throw exceptions
reduced.getTiles();
// check the chain has been reduced
assertEquals("Warp", reduced.getOperationName());
assertEquals(1, reduced.getSources().size());
assertSame(ushortCoverage.getRenderedImage(), reduced.getSourceImage(0));
// check the bounds of the output image has not changed
assertEquals(fullChain.getBounds(), reduced.getBounds());
}
