pil rgb2hsv rgb2hls rgb2yuv

def rgb2hsv(img):
    if isinstance(img, Image.Image):
        r, g, b = img.split()
        Hdat = []
        Sdat = []
        Vdat = []
        for rd, gn, bl in zip(r.getdata(), g.getdata(), b.getdata()):
            h, s, v = colorsys.rgb_to_hsv(rd / 255., gn / 255., bl / 255.)
            # h, s, v = colorsys.rgb_to_yiq(rd / 255., gn / 255., bl / 255.)
            # h, s, v = colorsys.rgb_to_hls(rd / 255., gn / 255., bl / 255.)
            Hdat.append(int(h * 255.))
            Sdat.append(int(s * 255.))
            Vdat.append(int(v * 255.))
        r.putdata(Hdat)
        g.putdata(Sdat)
        b.putdata(Vdat)
        # return Image.merge('RGB', (r, g, b))
        return r, g, b
    else:
        return None
def rgb2hls(img):
    if isinstance(img, Image.Image):
        r, g, b = img.split()
        Hdat = []
        Sdat = []
        Vdat = []
        for rd, gn, bl in zip(r.getdata(), g.getdata(), b.getdata()):
            h, l, s = colorsys.rgb_to_hls(rd / 255., gn / 255., bl / 255.)
            # h, s, v = colorsys.rgb_to_yiq(rd / 255., gn / 255., bl / 255.)
            # h, s, v = colorsys.rgb_to_hls(rd / 255., gn / 255., bl / 255.)
            Hdat.append(int(h * 255.))
            Sdat.append(int(l * 255.))
            Vdat.append(int(s * 255.))
        r.putdata(Hdat)
        g.putdata(Sdat)
        b.putdata(Vdat)
        # return Image.merge('RGB', (r, g, b))
        return r, g, b
    else:
        return None
def rgb2yuv(img):
    if isinstance(img, Image.Image):
        r, g, b = img.split()
        Ydat = []
        Udat = []
        Vdat = []
        for rd, gn, bl in zip(r.getdata(), g.getdata(), b.getdata()):
            y = 0.3 * rd + 0.59 * gn + 0.11 * bl
            u = -0.15 * rd + -0.29 * gn + 0.44 * bl
            v = 0.51 * rd + 0.52 * gn + -0.095 * bl
            Ydat.append(int(y))
            Udat.append(int(u))
            Vdat.append(int(v))
        r.putdata(Ydat)
        g.putdata(Udat)
        b.putdata(Vdat)
        return r, g, b
    else:
        return None