Function findImagesRootDir

src/utils/colmapPathResolver.ts:208–217

* The canonical `images` root ancestor of an image path, if any. Images are * often nested in per-camera subdirectories (e.g. `images/cam_1/00.png`), so * the images directory is the `images` ancestor, not the file's immediate * parent. Returns null when no `images` segment is an ancestor.

(path: string)

 * parent. Returns null when no `images` segment is an ancestor.
 */
function findImagesRootDir(path: string): string | null {
  const segments = path.replace(/\\/g, '/').split('/');
  // Skip the filename (last segment); search ancestor directory segments.
  for (let i = segments.length - 2; i >= 0; i -= 1) {
    if (segments[i].toLowerCase() === 'images') {
      return segments.slice(0, i + 1).join('/');
    }
  }
  return null;
}

export function resolveImagesDir(
  paths: Iterable<string>,