ImageUtils { public static double norm(int pixel1, int pixel2) { int red1 = (pixel1 >> 16) & 0xff; int green1 = (pixel1 >> 8) & 0xff; int blue1 = (pixel1) & 0xff; int red2 = (pixel2 >> 16) & 0xff; int green2 = (pixel2 >> 8) & 0xff; int blue2 = (pixel2) & 0xff; int redDist = (red1 - red2) * (red1 - red2); int greenDist = (green1 - green2) * (green1 - green2); int blueDist = (blue1 - blue2) * (blue1 - blue2); return redDist + greenDist + blueDist; } private  ImageUtils(); static ImageComparedResult compare(BufferedImage image1, Rectangle imageArea1, BufferedImage image2,
			Rectangle imageArea2, CompareOption[] options); static boolean isContained(BufferedImage entireImage, BufferedImage partImage); static double[][] calcIntegralImage(BufferedImage source); static boolean imageEquals(BufferedImage image1, BufferedImage image2); static BufferedImage getMaskedImage(BufferedImage image, List<Rectangle> maskAreas); static BufferedImage getMarkedImage(BufferedImage image, DiffPoints diffPoints); static BufferedImage getDiffImage(BufferedImage leftImage, BufferedImage rightImage, DiffPoints diffPoints); static BufferedImage trim(BufferedImage image, int trimTop, int trimLeft, int trimBottom, int trimRight); static BufferedImage verticalMerge(List<BufferedImage> images); static BufferedImage merge(List<List<BufferedImage>> images); static int[] getRGB(BufferedImage image, int width, int height); static int[] toARGB(int pixel); static int toPixel(int[] argb); static int toPixel(int r, int g, int b); static int toPixel(int a, int r, int g, int b); static int detectBackgroundColor(BufferedImage b); static boolean getObjectRectangle(BufferedImage image, Rectangle rectangle); static double norm(int pixel1, int pixel2); static double[] countSubpixel(BufferedImage bimage); static void removeRedundantRectangles(List<Rectangle> rectangles, int xLimit, int yLimit); static void removeOverlappingRectangles(List<Rectangle> rectangles); static void reshapeRect(Rectangle rectangle, int xLimit, int yLimit); static Rectangle getTightDiffArea(Rectangle rectangle, int xLimit, int yLimit); static List<Rectangle> convertObjectGroupsToAreas(List<ObjectGroup> objectGroups); static List<ObjectGroup> convertDiffPointsToObjectGroups(DiffPoints DP, int group_distance); static BufferedImage getSubImage(BufferedImage image, Rectangle rectangle); static Offset findDominantOffset(BufferedImage expectedImage, BufferedImage actualImage, double diffThreshold); static BufferedImage getDominantImage(BufferedImage expectedImage, BufferedImage actualImage, Offset offset); static int getSizeRelationType(int expectedWidth, int expectedHeight, int actualWidth, int actualHeight);  }
@Test public void testNorm() throws Exception { int pixel1 = 0xffffffff, pixel2 = 0xffffffff; double expected = 0.0; double actual = ImageUtils.norm(pixel1, pixel2); assertThat(actual, is(expected)); }