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.

Applies the default TiffFolderOptions: chunked VENUS folders (<prefix>_<chunk>_<frame>.tif) are detected automatically, ordered by numeric frame index, and chunks covering identical frame ranges are summed element-wise. Only folders not following the chunk convention load in lexicographic filename order — name legacy files with zero-padded indices (e.g., frame_0001.tif, frame_0002.tif, …). No provenance is returned; use load_tiff_folder_with_options to get a TiffLoadInfo and to control chunk summing.

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::FileNotFound if dir does not exist.
• IoError::NotADirectory if dir exists but is not a directory.
• IoError::NoMatchingFiles if no files match the pattern.
• IoError::DimensionMismatch if frames have inconsistent dimensions.
• IoError::ChunkMismatch if a chunked folder is internally inconsistent and chunk summing is enabled (the default); with sum_chunks = false the inconsistency is reported via TiffLoadInfo::chunk_inconsistent instead of raised.