def undersampled(semibmaj, semibmin):
    """
    We want more than 2 pixels across the beam major and minor axes.

    :param Semibmaj/semibmin: describe the beam size in pixels
    :returns: True if beam is undersampled, False otherwise
    """
    return semibmaj * 2 <= 1 or semibmin * 2 <= 1