/*
     * Add green to the image.
     */
    /**
     *
     * @param originalImage image to be shifted.
     * @param amount amount to be shifted.
     * @return shifted image.
     */
    public static int[][] moreGreen(final int[][] originalImage, final int amount) {
        int[][] shiftedArray = new int[originalImage.length][originalImage[0].length];
        shiftedArray = colorShift(amount, 2, originalImage);
        return shiftedArray;
    }

    /*
     * Remove green from the image.
     */
    /**
    *
    * @param originalImage image to be shifted.
    * @param amount amount to be shifted.
    * @return shifted image.
    */
    public static int[][] lessGreen(final int[][] originalImage, final int amount) {
        int[][] shiftedArray = new int[originalImage.length][originalImage[0].length];
        shiftedArray = colorShift(-amount, 2, originalImage);
        return shiftedArray;
    }