machinevisiontoolbox.Image.colordict

static Image.colordict(colororder)[source]

Parse a color order specification

Parameters:: colororder (str, dict) – order of color channels
Raises:: ValueError – colororder not a string or dict
Returns:: dictionary mapping color names to plane indices
Return type:: dict

The color order the value can be given in a variety of forms:

simple string, one plane per character, eg. "RGB"
colon separated string, eg. "R:G:B", "L*:a*:b*"
dictionary, eg. dict(R=0, G=1, B=2)

Example:

>>> from machinevisiontoolbox import Image
>>> Image.colordict('RGB')
{'R': 0, 'G': 1, 'B': 2}
>>> Image.colordict('red:green:blue')
{'red': 0, 'green': 1, 'blue': 2}
>>> Image.colordict({'L*': 0, 'U*': 1, 'V*': 2})
{'L*': 0, 'U*': 1, 'V*': 2}