Atmosphere89/PromptAligner

1# ===========================2# core/evaluator.py — Harmony Index computation3# ===========================4 5def compute_harmony_index(v_c: float, v_a: float, v_s: float, weights=(1, 1, 1)) -> float:6    """7    Compute the Harmony Index (H) using a weighted geometric mean.8 9    Parameters10    ----------11    v_c : float12        Content Consistency (semantic similarity)13    v_a : float14        Aesthetic Alignment (visual style score)15    v_s : float16        Structural Similarity (composition matching)17    weights : tuple18        (alpha, beta, gamma) weight coefficients19 20    Returns21    -------22    float23        The harmony score (H) between 0 and 1.24    """25    alpha, beta, gamma = weights26    product = (v_c ** alpha) * (v_a ** beta) * (v_s ** gamma)27    exponent = 1 / (alpha + beta + gamma)28    return product ** exponent