diff --git a/src/darsia/assistants/segmentation_assistant.py b/src/darsia/assistants/segmentation_assistant.py
deleted file mode 100644
index b99ad71c..00000000
--- a/src/darsia/assistants/segmentation_assistant.py
+++ /dev/null
@@ -1,144 +0,0 @@
-"""Module for aiding geometry segmentation using a scharr-based method."""
-
-from typing import Any, Optional
-from warnings import warn
-
-import matplotlib.pyplot as plt
-import numpy as np
-
-import darsia
-
-
-class SegmentationAssistant(darsia.BaseAssistant):
-    def __init__(self, img: darsia.Image, **kwargs) -> None:
-        super().__init__(img, use_coordinates=False, **kwargs)
-
-        # Only continuer for 2d images
-        assert self.img.space_dim == 2, "Only 2d images are supported."
-
-        # Initialize containers
-        self._reset()
-
-        # Set name for titles in plots
-        self.name = "Segmentation assistant"
-        # Prepare output
-        self.pts = None
-        """Points uniquely defining characteristic pts of detected regions."""
-
-    def __call__(self) -> Optional[np.ndarray]:
-        """Call the assistant."""
-
-        if not self.finalized:
-            self._reset()
-            super().__call__()
-
-        # Print the determined points to screen so one can hardcode the definition of
-        # the subregion if required.
-        if self.verbosity and self.pts is not None:
-            print("The identified regions are defined by the points:")
-            print(np.array(self.pts).astype(int))
-
-        # Close the figure opened by the base class
-        plt.close(self.fig)
-
-        # The segmentation algorithm expects the points as int pixel coordinates
-        return np.array(self.pts).astype(int)
-
-    def _reset(self) -> None:
-        """Reset list of points."""
-        self.pts = []
-        self.finalized = False
-        """Flag controlling whether the selection has been finalized."""
-        if self.verbosity:
-            warn("Resetting list of points.")
-
-    def _print_instructions(self) -> None:
-        """Print instructions - always print those."""
-        print(
-            """\n----------------------------------------------------------------"""
-            """-----------"""
-        )
-        print("Welcome to the segmentation assistant.")
-        print("Select points with 'left mouse click' to identify a homogeneous layer.")
-        print("Press 'd' to remove the latest selected point.")
-        print("Press 'escape' to reset the selection.")
-        print("Press 'enter' to finalize the selection.")
-        print("Press 'q' to quit the assistant (possibly before finalizing).")
-        print("NOTE: Do not close the figure yourself.")
-        print(
-            """------------------------------------------------------------------"""
-            """---------\n"""
-        )
-
-    def _print_current_selection(self) -> None:
-        """Print current selection."""
-        if self.verbosity:
-            print(f"Current selection of points:")
-            print(self.pts)
-
-    def _setup_event_handler(self) -> None:
-        """Setup event handler."""
-        super()._setup_event_handler()
-        self.fig.canvas.mpl_connect("button_press_event", self._on_mouse_click)
-
-    def _on_mouse_click(self, event: Any) -> None:
-        """Event handler for mouse clicks."""
-
-        # Print event
-        self._print_event(event)
-
-        # Only continue if no mode is active
-        state = self.fig.canvas.toolbar.mode
-        if state == "":
-            # Fetch the physical coordinates in 2d plane and interpret 2d point in
-            # three dimensions
-            if event.button == 1:
-                # Add point to subregion (in 2d)
-                self.pts.append([event.xdata, event.ydata])
-
-                # Draw a circle around the selected point
-                self.ax.plot(
-                    event.xdata,
-                    event.ydata,
-                    "go",
-                    markersize=10,
-                )
-                self.fig.canvas.draw()
-                self._print_current_selection()
-
-    def _on_key_press(self, event: Any) -> None:
-        """Event for pressing key 'd'."""
-
-        super()._on_key_press(event)
-
-        # Key 'd' is pressed
-        if event.key == "d":
-            self._remove_last_point(event.xdata, event.ydata)
-
-    def _remove_last_point(self, xdata, ydata) -> None:
-        """Remove last point from selection.
-
-        Args:
-            xdata: x-coordinate of point to remove
-            ydata: y-coordinate of point to remove
-
-        """
-
-        self.pts.pop()
-        self._print_current_selection()
-        # Draw a red circle around the de-selected point
-        self.ax.plot(
-            xdata,
-            ydata,
-            "ro",
-            markersize=10,
-        )
-        self.fig.canvas.draw()
-
-    def _finalize(self) -> None:
-        """Finalize selection."""
-
-        self.finalized = True
-
-        # Next round.
-        self.__call__()