Examples with CoreCommonImageMetadata it.geosolutions.imageio.core.CoreCommonImageMetadata used on opensource projects

Example 1 with CoreCommonImageMetadata

use of it.geosolutions.imageio.core.CoreCommonImageMetadata in project imageio-ext by geosolutions-it.

the class TIFFReadTest method readWithEmptyTiles.

@Test
public void readWithEmptyTiles() throws IOException {
    // This input image is a 1440x720 image. However, the right half of the image
    // is made of empty tiles filled with nodata
    final File file = TestData.file(this, "emptyTiles.tif");
    final TIFFImageReader reader = (TIFFImageReader) new TIFFImageReaderSpi().createReaderInstance();
    FileImageInputStream inputStream = new FileImageInputStream(file);
    try {
        reader.setInput(inputStream);
        ImageReadParam param = new ImageReadParam();
        // Setting up a region to fall in the half of the image containing empty tiles
        param.setSourceRegion(new Rectangle(360, 0, 720, 720));
        BufferedImage image = reader.read(0, param);
        Assert.assertEquals(720, image.getWidth());
        Assert.assertEquals(720, image.getHeight());
        IIOMetadata metadata = reader.getImageMetadata(0);
        Node rootNode = metadata.getAsTree(metadata.getNativeMetadataFormatName());
        double noDataValue = getNoDataValue(rootNode);
        // get it from the core common metadata too
        CoreCommonImageMetadata ccm = (CoreCommonImageMetadata) metadata;
        double[] noDataArray = ccm.getNoData();
        assertNotNull(noDataArray);
        assertEquals(noDataArray[0], noDataValue, 0d);
        assertEquals(noDataArray[1], noDataValue, 0d);
        // Check that the value is noData (the empty Tiles are filled with NoData)
        double val = image.getData().getSampleDouble(719, 0, 0);
        assertEquals(Double.toString(noDataValue), Double.toString(val));
        image.flush();
        image = null;
    } catch (Exception e) {
        // If an exception occurred the logger catch the exception and print
        // the message
        logger.log(Level.SEVERE, e.getMessage(), e);
    } finally {
        if (inputStream != null) {
            inputStream.flush();
            inputStream.close();
        }
        if (reader != null) {
            reader.dispose();
        }
    }
}