lab2lch(lab)

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

Notes

The Hue is expressed as an angle between (0, 2*pi)

Parameters

lab : (..., 3) array_like

The N-D image in CIE-LAB 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.

Raises

ValueError

If :None:None:`lch` does not have at least 3 color channels (i.e. l, a, b).

Returns

out : (..., 3) ndarray

The image in LCH format, in a N-D array with same shape as input lab .

CIE-LAB to CIE-LCH 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 rgb2lab, lab2lch
... img = data.astronaut()
... img_lab = rgb2lab(img)
... img_lch = lab2lch(img_lab)

See :

Back References

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

skimage.color.colorconv.lab2lch

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