audio_filtering.py 文件源码

def __tremoloRGB(I, Fc=5, alpha=0.5, Fs=44100):
    index = np.arange(0, pgc.width(I)*pgc.height(I))
    trem = (1 + alpha * np.sin(2 * np.pi * index * (Fc / Fs)))
    for c in prange(0, 2):
        x = pgc.to_1d_array(I[:, :, c])
        y = np.multiply(x, trem)
        I[:, :, c] = np.reshape(y, (pgc.height(I), pgc.width(I)))
    return I