def rgb_to_hsb(r, g, b, *rest):
# see https://en.wikipedia.org/wiki/HSB_color_space. HSB is also known as HSV.
r, g, b = _clip1((r, g, b))
m1 = maximum(r, g, b)
m0 = minimum(r, g, b)
c = m1 - m0
eps = 1e-15
h = _compute_hsb_h(m1, c, eps, r, g, b)
h = _wrap_hsb_h(h * (60. / 360.))
s = _compute_hsb_s(m1, c, eps)
return (h, s, m1) + rest
def rgb_to_hsb(r, g, b, *rest):
# see https://en.wikipedia.org/wiki/HSB_color_space. HSB is also known as HSV.
r, g, b = _clip1((r, g, b))
m1 = maximum(r, g, b)
m0 = minimum(r, g, b)
c = m1 - m0
eps = 1e-15
h = _compute_hsb_h(m1, c, eps, r, g, b)
h = _wrap_hsb_h(h * (60. / 360.))
s = _compute_hsb_s(m1, c, eps)
return (h, s, m1) + rest
def rgb_to_cmyk(r, g, b, *rest):
k_ = maximum(r, g, b)
k = 1 - k_
c, m, y = map(lambda t: _scale_rgb_to_cmyk(t, k, k_, 1e-15), (r, g, b))
return (c, m, y, k) + rest
def testMaximum(self):
self.assertEqualArrays(
maximum([[1, 2], [3, 4]], [[-1, 4], [-8, 5]], [[8, -4], [1, 10]]),
[[8, 4], [3, 10]])
def testMaximum(self):
self.assertEqualArrays(maximum(
[[1, 2], [3, 4]],
[[-1, 4], [-8, 5]],
[[8, -4], [1, 10]]), [[8, 4], [3, 10]])
def rgb_to_cmyk(r, g, b, *rest):
k_ = maximum(r, g, b)
k = 1 - k_
c, m, y = map(lambda t: _scale_rgb_to_cmyk(t, k, k_, 1e-15), (r, g, b))
return (c, m, y, k) + rest
