def METHOD_NAME(plateName):
    """Return the polygon defining the valid pixels inside the full resolution plate image"""
    if plateName[0] == 'N':
        return [[0, 0], [17232, 0], [17232, 1200], [19200, 1200], [19200, 19200], [0, 19200]]
    else:
        assert plateName[0] == 'S'
        return [[480, 0], [17232, 0], [17232, 17232], [0, 17232], [0, 624], [480, 624]]