Adding max filter and square filter

elevation_mapping_cupy/script/elevation_mapping_cupy/plugins/max_layer_filter.py

@@ -29,6 +29,7 @@ def __init__(
         min_or_max: str = "max",
         thresholds: list = [False],
         default_value: float = 0.0,
+        apply_sqrt: bool = True,
         **kwargs,
     ):
         super().__init__()
@@ -37,6 +38,7 @@ def __init__(
         self.min_or_max = min_or_max
         self.thresholds = thresholds
         self.default_value = default_value
+        self.apply_sqrt = apply_sqrt
 
     def get_layer_data(
         self,
@@ -119,4 +121,6 @@ def __call__(
             result = cp.min(result, axis=0)
         else:
             result = cp.max(result, axis=0)
+        if self.apply_sqrt:
+            result = cp.square(result)
         return result

elevation_mapping_cupy/script/elevation_mapping_cupy/plugins/sqrt_filter.py

@@ -0,0 +1,122 @@
+#
+# Copyright (c) 2022, Takahiro Miki. All rights reserved.
+# Licensed under the MIT license. See LICENSE file in the project root for details.
+#
+import cupy as cp
+import numpy as np
+from typing import List
+
+from elevation_mapping_cupy.plugins.plugin_manager import PluginBase
+
+
+class MaxLayerFilter(PluginBase):
+    """Applies a maximum filter to the input layers and updates the traversability map.
+    This can be used to enhance navigation by identifying traversable areas.
+
+    Args:
+        cell_n (int): The width and height of the elevation map.
+        layers (list): List of layers for semantic traversability. Default is ["traversability"].
+        thresholds (list): List of thresholds for each layer. Default is [0.5].
+        type (list): List of types for each layer. Default is ["traversability"].
+        **kwargs: Additional keyword arguments.
+    """
+
+    def __init__(
+        self,
+        cell_n: int = 100,
+        layers: list = ["traversability"],
+        reverse: list = [True],
+        min_or_max: str = "max",
+        thresholds: list = [False],
+        default_value: float = 0.0,
+        **kwargs,
+    ):
+        super().__init__()
+        self.layers = layers
+        self.reverse = reverse
+        self.min_or_max = min_or_max
+        self.thresholds = thresholds
+        self.default_value = default_value
+
+    def get_layer_data(
+        self,
+        elevation_map,
+        layer_names,
+        plugin_layers,
+        plugin_layer_names,
+        semantic_map,
+        semantic_layer_names,
+        name,
+    ):
+        if name in layer_names:
+            idx = layer_names.index(name)
+            layer = elevation_map[idx].copy()
+        elif name in plugin_layer_names:
+            idx = plugin_layer_names.index(name)
+            layer = plugin_layers[idx].copy()
+        elif name in semantic_layer_names:
+            idx = semantic_layer_names.index(name)
+            layer = semantic_map[idx].copy()
+        else:
+            print(f"Could not find layer {name}!")
+            layer = None
+        return layer
+
+    def __call__(
+        self,
+        elevation_map: cp.ndarray,
+        layer_names: List[str],
+        plugin_layers: cp.ndarray,
+        plugin_layer_names: List[str],
+        semantic_map: cp.ndarray,
+        semantic_layer_names: List[str],
+        *args,
+    ) -> cp.ndarray:
+        """
+
+        Args:
+            elevation_map (cupy._core.core.ndarray):
+            layer_names (List[str]):
+            plugin_layers (cupy._core.core.ndarray):
+            plugin_layer_names (List[str]):
+            semantic_map (elevation_mapping_cupy.semantic_map.SemanticMap):
+            *args ():
+
+        Returns:
+            cupy._core.core.ndarray:
+        """
+        layers = []
+        for it, name in enumerate(self.layers):
+            layer = self.get_layer_data(
+                elevation_map, layer_names, plugin_layers, plugin_layer_names, semantic_map, semantic_layer_names, name
+            )
+            if layer is None:
+                continue
+            if isinstance(self.default_value, float):
+                layer = cp.where(layer == 0.0, float(self.default_value), layer)
+            elif isinstance(self.default_value, str):
+                default_layer = self.get_layer_data(
+                    elevation_map,
+                    layer_names,
+                    plugin_layers,
+                    plugin_layer_names,
+                    semantic_map,
+                    semantic_layer_names,
+                    self.default_value,
+                )
+                layer = cp.where(layer == 0, default_layer, layer)
+            if self.reverse[it]:
+                layer = 1.0 - layer
+            if isinstance(self.thresholds[it], float):
+                layer = cp.where(layer > float(self.thresholds[it]), 1, 0)
+            layers.append(layer)
+        if len(layers) == 0:
+            print("No layers are found, returning traversability!")
+            idx = layer_names.index("traversability")
+            return elevation_map[idx]
+        result = cp.stack(layers, axis=0)
+        if self.min_or_max == "min":
+            result = cp.min(result, axis=0)
+        else:
+            result = cp.max(result, axis=0)
+        return result