def pixel(x,y)
      Pixel.new(x,y,@image.getARGB(point_to_index(x,y)))
    end
def pixel(x,y)
      Pixel.new(x,y,@image.getARGB(point_to_index(x,y)))
    end
Returns pixel content
 @param [Integer, Integer] pixel position x,y
 @return [AdbSdkLib::Pixel] pixel content