I noticed that when napari-animation interpolates the rotation matrix it deforms the data (changes its scale) because it doesn't guarantee the rotation matrix is orthonormal.
I think it should use something similar to the slerp interpolation of the camera.angles but in the matrix transform domain.
For example, when rotating this 3D image it's actually changing the scale on the z-axis.
import napari
import numpy as np
from skimage import data
from napari_animation import Animation
if __name__ == "__main__":
viewer = napari.view_image(data.cells3d(), channel_axis=1)
animation = Animation(viewer)
animation.capture_keyframe()
R = np.diagflat([1, 1, -1])
for l in viewer.layers:
l.rotate = R
viewer.reset_view()
animation.capture_keyframe(127)
animation.animate("video.mp4")
Hi,
I noticed that when napari-animation interpolates the rotation matrix it deforms the data (changes its scale) because it doesn't guarantee the rotation matrix is orthonormal.
I think it should use something similar to the
slerp
interpolation of thecamera.angles
but in the matrix transform domain.For example, when rotating this 3D image it's actually changing the scale on the z-axis.
https://user-images.githubusercontent.com/21022743/201121747-31e1fd84-7193-4e0d-be86-adf129a1b137.mp4
Script to reproduce:
I can open a PR if this is agreed to be a bug.