Prevent colmap from opening (#1627)

docs/quickstart/custom_dataset.md

@@ -33,12 +33,6 @@ To assist running on custom data we have a script that will process a video or f
 - COLMAP can be finicky. Try your best to capture overlapping, non-blurry images.
   :::
 
-:::{admonition} Note
-:class: warning
-
-- If COLMAP opens in a new window, simply close it to resume processing.
-  :::
-
 ### Processing Data
 
 ```bash

nerfstudio/process_data/colmap_utils.py

@@ -55,7 +55,7 @@ def get_colmap_version(colmap_cmd: str, default_version=3.8) -> float:
     Returns:
         The version of COLMAP.
     """
-    output = run_command(colmap_cmd, verbose=False)
+    output = run_command(f"{colmap_cmd} -h", verbose=False)
     assert output is not None
     for line in output.split("\n"):
         if line.startswith("COLMAP"):