xyz2luv
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skimage.color.xyz2luv(xyz, illuminant='D65', observer='2')
[source] -
XYZ to CIE-Luv color space conversion.
Parameters: xyz : (M, N, [P,] 3) array_like
The 3 or 4 dimensional image in XYZ format. Final dimension denotes channels.
illuminant : {“A”, “D50”, “D55”, “D65”, “D75”, “E”}, optional
The name of the illuminant (the function is NOT case sensitive).
observer : {“2”, “10”}, optional
The aperture angle of the observer.
Returns: out : (M, N, [P,] 3) ndarray
The image in CIE-Luv format. Same dimensions as input.
Raises: ValueError
If
xyz
is not a 3-D or 4-D array of shape(M, N, [P,] 3)
.ValueError
If either the illuminant or the observer angle are not supported or unknown.
Notes
By default XYZ conversion weights use observer=2A. Reference whitepoint for D65 Illuminant, with XYZ tristimulus values of
(95.047, 100., 108.883)
. See function ‘get_xyz_coords’ for a list of supported illuminants.References
[R58] http://www.easyrgb.com/index.php?X=MATH&H=16#text16 [R59] http://en.wikipedia.org/wiki/CIELUV Examples
>>> from skimage import data >>> from skimage.color import rgb2xyz, xyz2luv >>> img = data.astronaut() >>> img_xyz = rgb2xyz(img) >>> img_luv = xyz2luv(img_xyz)
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