Function load_tiff_folder 

pub fn load_tiff_folder(
    dir: &Path,
    pattern: Option<&str>,
) -> Result<Array3<f64>, IoError>

Load a directory of TIFFs matching a glob pattern as a 3D stack.

Files are sorted lexicographically by name, so they should be named with zero-padded indices (e.g., frame_0001.tif, frame_0002.tif, …).

Only files with .tif or .tiff extensions (case-insensitive) are considered. When pattern is None, all such files are loaded. When Some, the pattern is additionally matched against each filename (not the full path) and supports * (matches any sequence of characters) and ? (matches a single character). Examples: "*.tif", "frame_*.tiff", "scan_*" (the extension guard still applies, so non-TIFF files are never decoded).

Arguments

• dir — Path to the directory containing TIFF files.
• pattern — Optional glob pattern to filter filenames.

Returns

3D array with shape (n_files, height, width) and f64 values.

Errors

• IoError::NoMatchingFiles if no files match the pattern.
• IoError::DimensionMismatch if frames have inconsistent dimensions.