Colorspace

Image types

Every Image object has type property which identifies its colorspace. The value can be one of IMAGE_TYPES enumeration, and set of its available values depends on its format as well. For example, 'grayscale' isn’t available on JPEG.

>>> from wand.image import Image
>>> with Image(filename='wandtests/assets/bilevel.gif') as img:
...     img.type
...
'bilevel'
>>> with Image(filename='wandtests/assets/sasha.jpg') as img2:
...    img2.type
...
'truecolor'

You can change this value:

with Image(filename='wandtests/assets/bilevel.gif') as img:
    img.type = 'truecolor'
    img.save(filename='truecolor.gif')

See also

-type — ImageMagick: command-line-Options

Corresponding command-line option of convert program.

Enable alpha channel

You can find whether an image has alpha channel and change it to have or not to have the alpha channel using alpha_channel property, which is preserving a bool value.

>>> with Image(filename='wandtests/assets/sasha.jpg') as img:
...    img.alpha_channel
...
False
>>> with Image(filename='wandtests/assets/croptest.png') as img:
...    img.alpha_channel
...
True

It’s a writable property:

with Image(filename='wandtests/assets/sasha.jpg') as img:
    img.alpha_channel = True