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convert.py

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+#
+# Copyright (C) 2023, Inria
+# GRAPHDECO research group, https://team.inria.fr/graphdeco
+# All rights reserved.
+#
+# This software is free for non-commercial, research and evaluation use
+# under the terms of the LICENSE.md file.
+#
+# For inquiries contact  george.drettakis@inria.fr
+#
+
+import os
+import logging
+from argparse import ArgumentParser
+import shutil
+
+# This Python script is based on the shell converter script provided in the MipNerF 360 repository.
+parser = ArgumentParser("Colmap converter")
+parser.add_argument("--no_gpu", action='store_true')
+parser.add_argument("--skip_matching", action='store_true')
+parser.add_argument("--source_path", "-s", required=True, type=str)
+parser.add_argument("--camera", default="OPENCV", type=str)
+parser.add_argument("--colmap_executable", default="", type=str)
+parser.add_argument("--resize", action="store_true")
+parser.add_argument("--magick_executable", default="", type=str)
+args = parser.parse_args()
+colmap_command = '"{}"'.format(args.colmap_executable) if len(args.colmap_executable) > 0 else "colmap"
+magick_command = '"{}"'.format(args.magick_executable) if len(args.magick_executable) > 0 else "magick"
+use_gpu = 1 if not args.no_gpu else 0
+
+if not args.skip_matching:
+    os.makedirs(args.source_path + "/distorted/sparse", exist_ok=True)
+
+    ## Feature extraction
+    feat_extracton_cmd = colmap_command + " feature_extractor "\
+        "--database_path " + args.source_path + "/distorted/database.db \
+        --image_path " + args.source_path + "/input \
+        --ImageReader.single_camera 1 \
+        --ImageReader.camera_model " + args.camera + " \
+        --SiftExtraction.use_gpu " + str(use_gpu)
+    exit_code = os.system(feat_extracton_cmd)
+    if exit_code != 0:
+        logging.error(f"Feature extraction failed with code {exit_code}. Exiting.")
+        exit(exit_code)
+
+    ## Feature matching
+    feat_matching_cmd = colmap_command + " exhaustive_matcher \
+        --database_path " + args.source_path + "/distorted/database.db \
+        --SiftMatching.use_gpu " + str(use_gpu)
+    exit_code = os.system(feat_matching_cmd)
+    if exit_code != 0:
+        logging.error(f"Feature matching failed with code {exit_code}. Exiting.")
+        exit(exit_code)
+
+    ### Bundle adjustment
+    # The default Mapper tolerance is unnecessarily large,
+    # decreasing it speeds up bundle adjustment steps.
+    mapper_cmd = (colmap_command + " mapper \
+        --database_path " + args.source_path + "/distorted/database.db \
+        --image_path "  + args.source_path + "/input \
+        --output_path "  + args.source_path + "/distorted/sparse \
+        --Mapper.ba_global_function_tolerance=0.000001")
+    exit_code = os.system(mapper_cmd)
+    if exit_code != 0:
+        logging.error(f"Mapper failed with code {exit_code}. Exiting.")
+        exit(exit_code)
+
+### Image undistortion
+## We need to undistort our images into ideal pinhole intrinsics.
+img_undist_cmd = (colmap_command + " image_undistorter \
+    --image_path " + args.source_path + "/input \
+    --input_path " + args.source_path + "/distorted/sparse/0 \
+    --output_path " + args.source_path + "\
+    --output_type COLMAP")
+exit_code = os.system(img_undist_cmd)
+if exit_code != 0:
+    logging.error(f"Mapper failed with code {exit_code}. Exiting.")
+    exit(exit_code)
+
+files = os.listdir(args.source_path + "/sparse")
+os.makedirs(args.source_path + "/sparse/0", exist_ok=True)
+# Copy each file from the source directory to the destination directory
+for file in files:
+    if file == '0':
+        continue
+    source_file = os.path.join(args.source_path, "sparse", file)
+    destination_file = os.path.join(args.source_path, "sparse", "0", file)
+    shutil.move(source_file, destination_file)
+
+if(args.resize):
+    print("Copying and resizing...")
+
+    # Resize images.
+    os.makedirs(args.source_path + "/images_2", exist_ok=True)
+    os.makedirs(args.source_path + "/images_4", exist_ok=True)
+    os.makedirs(args.source_path + "/images_8", exist_ok=True)
+    # Get the list of files in the source directory
+    files = os.listdir(args.source_path + "/images")
+    # Copy each file from the source directory to the destination directory
+    for file in files:
+        source_file = os.path.join(args.source_path, "images", file)
+
+        destination_file = os.path.join(args.source_path, "images_2", file)
+        shutil.copy2(source_file, destination_file)
+        exit_code = os.system(magick_command + " mogrify -resize 50% " + destination_file)
+        if exit_code != 0:
+            logging.error(f"50% resize failed with code {exit_code}. Exiting.")
+            exit(exit_code)
+
+        destination_file = os.path.join(args.source_path, "images_4", file)
+        shutil.copy2(source_file, destination_file)
+        exit_code = os.system(magick_command + " mogrify -resize 25% " + destination_file)
+        if exit_code != 0:
+            logging.error(f"25% resize failed with code {exit_code}. Exiting.")
+            exit(exit_code)
+
+        destination_file = os.path.join(args.source_path, "images_8", file)
+        shutil.copy2(source_file, destination_file)
+        exit_code = os.system(magick_command + " mogrify -resize 12.5% " + destination_file)
+        if exit_code != 0:
+            logging.error(f"12.5% resize failed with code {exit_code}. Exiting.")
+            exit(exit_code)
+
+print("Done.")