Example usage for java.awt.image RenderedImage getData

Introduction

In this page you can find the example usage for java.awt.image RenderedImage getData.

Prototype

Raster getData(Rectangle rect);

Source Link

Document

Computes and returns an arbitrary region of the RenderedImage.

Usage

From source file:org.geopublishing.atlasStyler.classification.RasterClassification.java

/**
 * This is where the magic happens. Here the attributes of the features are
 * summarized in a {@link DynamicBin1D} class.
 * //from w w  w. j  ava 2  s  .c o m
 * @throws IOException
 */
@Override
synchronized public DynamicBin1D getStatistics() throws InterruptedException, IOException {

    cancelCalculation.set(false);

    if (stats == null) {
        GridCoverage2D coverage = getStyledRaster().getGeoObject().read(null);

        stats = new DynamicBin1D();

        noDataValuesCount.set(0);

        final RenderedImage rim = coverage.getRenderedImage();

        long size = Long.valueOf(rim.getHeight()) * Long.valueOf(rim.getWidth());
        long maxPixels = 3000000l;
        if (size > maxPixels) {
            setSubsampling((int) (size / maxPixels));
            LOGGER.info("Subsampling to every " + getSubsampling() + " pixel");
        }

        for (int row = 0; row < rim.getHeight(); row++) {

            if (row % getSubsampling() != 0) {
                // Skipping this line for Subsampling
                continue;
            } else {
                // DO
                //               System.out.println("");
            }

            int x1 = 0;
            int w = rim.getWidth();

            int y1 = row;
            int h = 1;

            Raster data = rim.getData(new Rectangle(x1, y1, w, h));
            double[] values = data.getSamples(0, y1, w, h, getBand(), (double[]) null);

            final DoubleArrayList doubleArrayList = new DoubleArrayList(values);

            if (getStyledRaster().getNodataValue() != null) {
                int sizewithNodata = doubleArrayList.size();
                doubleArrayList
                        .removeAll(new DoubleArrayList(new double[] { getStyledRaster().getNodataValue() }));
                noDataValuesCount.addAndGet(sizewithNodata - doubleArrayList.size());
            }

            stats.addAllOf(doubleArrayList);

            //            LOGGER.debug("Added "+doubleArrayList.size()+" to statistics");
            //            LOGGER.debug(stats.size()+" in stats");
            doubleArrayList.clear();
        }

    }
    return stats;
}

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From source file:org.esa.nest.gpf.ERSCalibrator.java

private RenderedImage removeFactorsApplied(final RenderedImage downSampledImage,
        final Rectangle sourceTileRectangle) {

    final int sx0 = sourceTileRectangle.x;
    final int w = downSampledImage.getWidth();
    final int h = downSampledImage.getHeight();
    final double[] array = new double[h * w];
    //final Raster data = downSampledImage.getData();
    final Raster data = downSampledImage.getData(new Rectangle(0, 0, w, h));
    double sigma;
    int k = 0;/*from w w w .  j  a  v a 2s  .c  o m*/
    for (int y = 0; y < h; y++) {
        for (int x = 0; x < w; x++) {

            sigma = data.getSampleDouble(x, y, 0);

            if (antennaPatternCorrectionFlag) {
                sigma *= antennaPatternGain[sx0 + x * blockWidth];
            }

            if (rangeSpreadingLossCompFlag) {
                sigma /= rangeSpreadingLoss[sx0 + x * blockWidth];
            }

            if (!isERS1Mission) {
                sigma /= replicaPulseVariationsCorrectionFactor;
            }

            array[k++] = Math.sqrt(sigma);
        }
    }

    return createRenderedImage(array, w, h);
}

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