public float[] getPixel(int x, int y, float[] fArray)
public int[] getPixel(int x, int y, int[] iArray)
  public float[] getPixel(int x, int y, float[] fArray)  {    return sampleModel.getPixel(x-sampleModelTranslateX,				y-sampleModelTranslateY,				fArray, dataBuffer);	}