Note
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Add pointsΒΆ
Display a points layer on top of an image layer using the add_points and
add_image APIs
import numpy as np
from skimage import data
from skimage.color import rgb2gray
import napari
# add the image
viewer = napari.view_image(rgb2gray(data.astronaut()))
# add the points
points = np.array([[100, 100], [200, 200], [333, 111]])
size = np.array([10, 20, 20])
viewer.add_points(points, size=size)
# unselect the image layer
viewer.layers.selection.discard(viewer.layers[0])
# adjust some of the points layer attributes
layer = viewer.layers[1]
# change the layer name
layer.name = 'points'
# change the layer visibility
layer.visible = False
layer.visible = True
# select the layer
viewer.layers.selection.add(layer)
# deselect the layer
viewer.layers.selection.remove(layer)
# or: viewer.layers.selection.discard(layer)
# change the layer opacity
layer.opacity = 0.9
# change the layer point symbol using an alias
layer.symbol = '+'
# change the layer point out_of_slice_display status
layer.out_of_slice_display = True
# change the layer mode
layer.mode = 'add'
if __name__ == '__main__':
napari.run()