def add_shift_steps_unbalanced(
        im_label_list_all, shift_step=0):
    """
    Appends a fixed shift step to each large image (ROI)
    Args:
        im_label_list_all - list of tuples of [(impath, lblpath),]
    Returns:
        im_label_list_all but with an added element to each tuple (shift step)
    """
    return [(j[0], j[1], shift_step) for j in im_label_list_all]