lch2lab

lch2lab

skimage.color.lch2lab(lch) [source]

CIE-LCH to CIE-LAB color space conversion.

LCH is the cylindrical representation of the LAB (Cartesian) colorspace

Parameters:	lch : array_like The N-D image in CIE-LCH format. The last (N+1-th) dimension must have at least 3 elements, corresponding to the L, a, and b color channels. Subsequent elements are copied.
Returns:	out : ndarray The image in LAB format, with same shape as input lch.
Raises:	ValueError If lch does not have at least 3 color channels (i.e. l, c, h).

Examples

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>>> from skimage import data >>> from skimage.color import rgb2lab, lch2lab >>> img = data.astronaut() >>> img_lab = rgb2lab(img) >>> img_lch = lab2lch(img_lab) >>> img_lab2 = lch2lab(img_lch)