image_manipulation.py 文件源码

def rescale_image(X):
    """rescales the RGB values back to 0-255 in the image (useful after especially applying audio filters)"""
    I = X.copy()
    if (I.min() < 0 or I.max() > 255):
        I = (I - I.min()) * (255 / (I.max() - I.min()))
        I = I.round()
    return I.astype(np.uint8)


# TODO: speed up with jit?