feat: add lidar course

2026_Lidar_and_Photogrammetry_Systems/lab1/lab1.py

@@ -0,0 +1,48 @@
+import json
+import laspy
+import numpy as np
+import open3d as o3d
+
+def density(data):
+    min_x, max_x = np.min(data.x), np.max(data.x)
+    min_y, max_y = np.min(data.y), np.max(data.y)
+
+    area = (max_x - min_x) * (max_y - min_y)
+    n_points = len(data.x)
+
+    density = n_points / area
+    return density
+
+def data2np(data):
+    points = np.vstack((data.x, data.y, data.z)).transpose()
+    return points
+
+def plot_o3d(points):
+    pcd = o3d.geometry.PointCloud()
+    pcd.points = o3d.utility.Vector3dVector(points)
+    o3d.visualization.draw_geometries([pcd])
+
+
+def main():
+    data_golm = laspy.read("2012/golm_364806_fp.las")
+    data_palais = laspy.read("2012/neuespalais362808_fp.las")
+
+    density_golm = density(data_golm)
+    density_palais = density(data_palais)
+
+    output_density = {
+        "golm": density_golm,
+        "palais": density_palais
+    }
+
+    with open("density.json", "w") as f:
+        json.dump(output_density, f, indent=4)
+
+    #points_golm = data2np(data_golm)
+    #points_palais = data2np(data_golm)
+
+    #plot_o3d(points_golm)
+    #plot_o3d(points_palais)
+
+if __name__ == "__main__":
+    main()