app/examples/pc_examples/take_photo.py

import open3d as o3d
import numpy as np
import os
from pathlib import Path

from PIL import Image
import os
from pathlib import Path

for folder_name in os.listdir("."):
    if folder_name != "take_photo.py" and os.path.isdir(folder_name):
        img_path = Path(folder_name) / "pc.png"
        if img_path.exists():
            with Image.open(img_path) as img:
                new_size = (img.width // 4, img.height // 4)
                img_resized = img.resize(new_size, Image.Resampling.LANCZOS)
                img_resized.save( Path(folder_name) / 'pc_resized.png')  # Overwrite original image

# for folder_name in os.listdir("."):
    # if folder_name != "take_photo.py":
    #     # Load point cloud
    #     pcd = o3d.io.read_point_cloud(Path(folder_name) / "pc.ply")

    #     # Set black points
    #     pcd.paint_uniform_color([0, 0, 0])  

    #     # Create a visualizer
    #     vis = o3d.visualization.Visualizer()
    #     vis.create_window(width=800, height=800)  # Keep same size for all images
    #     vis.add_geometry(pcd)

    #     # Set transparent background
    #     opt = vis.get_render_option()
    #     opt.background_color = np.array([1, 1, 1])  # White background (no transparency)


    #     # Capture Image
    #     vis.poll_events()
    #     vis.update_renderer()
    #     vis.capture_screen_image(Path(folder_name) / "pc.png", do_render=True)

    #     vis.destroy_window()