/** Flips the image from top to bottom */ public static void flipVertical(ImageInt16 img) { int h2 = img.height / 2; for (int y = 0; y < h2; y++) { int index1 = img.getStartIndex() + y * img.getStride(); int index2 = img.getStartIndex() + (img.height - y - 1) * img.getStride(); int end = index1 + img.width; while (index1 < end) { int tmp = img.data[index1]; img.data[index1++] = img.data[index2]; img.data[index2++] = (short) tmp; } } }
/** * Fills the whole image with the specified pixel value * * @param img An image. * @param value The value that the image is being filled with. */ public static void fill(ImageInt16 img, int value) { final int h = img.getHeight(); final int w = img.getWidth(); short[] data = img.data; for (int y = 0; y < h; y++) { int index = img.getStartIndex() + y * img.getStride(); for (int x = 0; x < w; x++) { data[index++] = (short) value; } } }
/** * Sets each value in the image to a value drawn from an uniform distribution that has a range of * min <= X < max. */ public static void randomize(ImageInt16 img, Random rand, int min, int max) { final int h = img.getHeight(); final int w = img.getWidth(); int range = max - min; short[] data = img.data; for (int y = 0; y < h; y++) { int index = img.getStartIndex() + y * img.getStride(); for (int x = 0; x < w; x++) { data[index++] = (short) (rand.nextInt(range) + min); } } }