skimage2.color.lab2xyz#

skimage2.color.lab2xyz(lab, illuminant='D65', observer='2', *, channel_axis=-1)[source]#

Convert image in CIE-LAB to XYZ color space.

Parameters:

labarray_like of shape (…, C=3, …): The input image in CIE-LAB color space. Unless channel_axis is set, the final dimension denotes the CIE-LAB channels. The L* values range from 0 to 100; the a* and b* values range from -128 to 127.
illuminant{“A”, “B”, “C”, “D50”, “D55”, “D65”, “D75”, “E”}, optional: The name of the illuminant (the function is NOT case sensitive).
observer{“2”, “10”, “R”}, optional: The aperture angle of the observer.
channel_axisint, optional: This parameter indicates which axis of the array corresponds to channels.

Added in version 0.19: channel_axis was added in 0.19.

Returns:

outndarray of shape (…, C=3, …): The image in XYZ color space, of same shape as input.

Raises:

ValueError: If lab is not at least 2-D with shape (…, C=3, …).
ValueError: If either the illuminant or the observer angle are not supported or unknown.
UserWarning: If any of the pixels are invalid (Z < 0).