java.awt.image.DataBufferUShort#getData()源码实例Demo

public static void WritePNGfile(String imagename, short[] linear, int width, int height) {
    BufferedImage buf = new BufferedImage(width, height, BufferedImage.TYPE_USHORT_555_RGB);
    DataBufferUShort sh = (DataBufferUShort) buf.getRaster().getDataBuffer();
    short[] shd = sh.getData();
    System.arraycopy(linear, 0, shd, 0, Math.min(linear.length, shd.length));
    try {
        ImageIO.write(buf, "PNG", new File(imagename));
    } catch (IOException e) {
        e.printStackTrace();
    }
}
 

private Object extractImageData(BufferedImage img){
    DataBuffer buf = img.getRaster().getDataBuffer();
    switch (buf.getDataType()){
        case DataBuffer.TYPE_BYTE:
            DataBufferByte byteBuf = (DataBufferByte) buf;
            return byteBuf.getData();
        case DataBuffer.TYPE_USHORT:
            DataBufferUShort shortBuf = (DataBufferUShort) buf;
            return shortBuf.getData();
    }
    return null;
}
 

/**
 * {@inheritDoc}
 */
@Override
public DecodeResult decode(InputStream encoded, OutputStream decoded, COSDictionary
        parameters, int index, DecodeOptions options) throws IOException
{
    DecodeResult result = new DecodeResult(new COSDictionary());
    result.getParameters().addAll(parameters);
    BufferedImage image = readJPX(encoded, options, result);

    Raster raster = image.getRaster();
    switch (raster.getDataBuffer().getDataType())
    {
        case DataBuffer.TYPE_BYTE:
            DataBufferByte byteBuffer = (DataBufferByte) raster.getDataBuffer();
            decoded.write(byteBuffer.getData());
            return result;

        case DataBuffer.TYPE_USHORT:
            DataBufferUShort wordBuffer = (DataBufferUShort) raster.getDataBuffer();
            for (short w : wordBuffer.getData())
            {
                decoded.write(w >> 8);
                decoded.write(w);
            }
            return result;

        case DataBuffer.TYPE_INT:
            // not yet used (as of October 2018) but works as fallback
            // if we decide to convert to BufferedImage.TYPE_INT_RGB
            int[] ar = new int[raster.getNumBands()];
            for (int y = 0; y < image.getHeight(); ++y)
            {
                for (int x = 0; x < image.getWidth(); ++x)
                {
                    raster.getPixel(x, y, ar);
                    for (int i = 0; i < ar.length; ++i)
                    {
                        decoded.write(ar[i]);
                    }
                }
            }
            return result;

        default:
            throw new IOException("Data type " + raster.getDataBuffer().getDataType() + " not implemented");
    }
}
 

/**
 * Get the pixel values of the raster as "unsigned shorts"
 * 
 * @param raster
 *            image raster
 * @return "unsigned short" pixel values
 */
public short[] getPixelValues(WritableRaster raster) {
	DataBufferUShort buffer = (DataBufferUShort) raster.getDataBuffer();
	short[] pixelValues = buffer.getData();
	return pixelValues;
}