tensor.py

"""Use a blueprint to show a tensor view."""

import numpy as np
import rerun as rr
import rerun.blueprint as rrb

rr.init("rerun_example_tensor", spawn=True)

tensor = np.random.randint(0, 256, (32, 240, 320, 3), dtype=np.uint8)
rr.log("tensor", rr.Tensor(tensor, dim_names=("batch", "x", "y", "channel")))

blueprint = rrb.Blueprint(
    rrb.TensorView(
        origin="tensor",
        name="Tensor",
        # Explicitly pick which dimensions to show.
        slice_selection=rrb.TensorSliceSelection(
            # Use the first dimension as width.
            width=1,
            # Use the second dimension as height and invert it.
            height=rr.TensorDimensionSelection(dimension=2, invert=True),
            # Set which indices to show for the other dimensions.
            indices=[
                rr.TensorDimensionIndexSelection(dimension=2, index=4),
                rr.TensorDimensionIndexSelection(dimension=3, index=5),
            ],
            # Show a slider for dimension 2 only. If not specified, all dimensions in `indices` will have sliders.
            slider=[2],
        ),
        # Set a scalar mapping with a custom colormap, gamma and magnification filter.
        scalar_mapping=rrb.TensorScalarMapping(colormap="turbo", gamma=1.5, mag_filter="linear"),
        # Fill the view, ignoring aspect ratio.
        view_fit="fill",
    ),
    collapse_panels=True,
)
rr.send_blueprint(blueprint)