Labels 2D¶

Display a labels layer above of an image layer using the add_labels and add_image APIs

/opt/hostedtoolcache/Python/3.9.15/x64/lib/python3.9/site-packages/skimage/_shared/utils.py:338: FutureWarning: `multichannel` is a deprecated argument name for `slic`. It will be removed in version 1.0. Please use `channel_axis` instead.
  warnings.warn(self.warning_msg.format(
The color of label 5 is [0.28053862 0.22821146 0.6264092  1.        ]

from skimage import data
from skimage.color import rgb2gray
from skimage.segmentation import slic
import napari


astro = data.astronaut()

# initialise viewer with astro image
viewer = napari.view_image(rgb2gray(astro), name='astronaut', rgb=False)

# add the labels
# we add 1 because SLIC returns labels from 0, which we consider background
labels = slic(astro, multichannel=True, compactness=20) + 1
label_layer = viewer.add_labels(labels, name='segmentation')

# Set the labels layer mode to picker with a string
label_layer.mode = 'PICK'
print(f'The color of label 5 is {label_layer.get_color(5)}')

if __name__ == '__main__':
    napari.run()

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Add image transformed

Set colormaps