1d275bddd7349b765db88c76ec7dcfdf85de0f42,aletheialib/attacks.py,,difference,#Any#Any#,132

Before Change

    cmask = - mask
    cmask[(mask > 0)] = 0
    abs_mask = np.abs(mask)
    counts = {}
    for g in groups(I, mask):
        flip = (g + cmask) ^ abs_mask - cmask
        result = np.sign(smoothness(flip) - smoothness(g))
        if result not in counts:
            counts[result] = 0
        counts[result] += 1
    N = sum(counts.values())
    R = float(counts[1])/N
    S = float(counts[-1])/N

After Change

// {{{ difference()
def difference(I, mask):
    pool = Pool(multiprocessing.cpu_count())
    analysis = pool.map(RSAnalysis(mask).call, groups(I, mask))
    pool.close()
    pool.join()

    counts = [0, 0, 0]
    for v in analysis:
        counts[v] += 1

    N = sum(counts)
    R = float(counts[1])/N
    S = float(counts[-1])/N
    return R-S

Instances