skimage 0.17.2

NotesParametersRaisesReturnsBackRef
xyz2lab(xyz, illuminant='D65', observer='2')

Notes

By default Observer= 2A, Illuminant= D65. CIE XYZ tristimulus values x_ref=95.047, y_ref=100., z_ref=108.883. See function get_xyz_coords for a list of supported illuminants.

Parameters

xyz : (..., 3) array_like

The 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.

Raises

ValueError

If :None:None:`xyz` is not at least 2-D with shape (..., 3).

ValueError

If either the illuminant or the observer angle is unsupported or unknown.

Returns

out : (..., 3) ndarray

The image in CIE-LAB format. Same dimensions as input.

XYZ to CIE-LAB color space conversion.

Examples

This example is valid syntax, but we were not able to check execution
>>> from skimage import data
... from skimage.color import rgb2xyz, xyz2lab
... img = data.astronaut()
... img_xyz = rgb2xyz(img)
... img_lab = xyz2lab(img_xyz)
See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

skimage.color.colorconv.xyz2lab

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