/**
* 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);
}
private void extremaOp(TiffMeta surface, GridCoverage2D gridCoverage2D) {
double min = Double.MAX_VALUE;
double max = Double.MIN_VALUE;
RenderedImage img = gridCoverage2D.getRenderedImage();
RenderedOp extremaOp = ExtremaDescriptor.create(img, null, 10, 10, false, 1, null);
double[] allMins = (double[]) extremaOp.getProperty("minimum");
min = Doubles.min(allMins);
double[] allMaxs = (double[]) extremaOp.getProperty("maximum");
max = Doubles.max(allMaxs);
surface.setMaxVal(max);
surface.setMinVal(min);
}