Struct CocoReader 

pub struct CocoReader { /* private fields */ }

Streaming COCO reader for large datasets.

Supports reading from JSON files and ZIP archives.

Example

use edgefirst_client::coco::CocoReader;

let reader = CocoReader::new();
let dataset = reader.read_json("annotations/instances_val2017.json")?;
println!("Loaded {} images", dataset.images.len());

Implementations

impl CocoReader

pub fn new() -> Self

Create a new COCO reader with default options.

pub fn with_options(options: CocoReadOptions) -> Self

Create a new COCO reader with custom options.

pub fn read_json<P: AsRef<Path>>(&self, path: P) -> Result<CocoDataset, Error>

Read COCO dataset from a JSON file.

Arguments

• path - Path to the COCO JSON annotation file

Returns

Parsed CocoDataset structure

pub fn read_annotations_zip<P: AsRef<Path>>( &self, path: P, ) -> Result<CocoDataset, Error>

Read COCO annotations from a ZIP file.

Looks for annotation JSON files in standard COCO locations:

• annotations/instances_*.json
• annotations/*.json
• Root level *.json files

Arguments

• path - Path to the ZIP archive containing annotations

Returns

Merged CocoDataset from all annotation files found

pub fn list_images<P: AsRef<Path>>( &self, path: P, ) -> Result<Vec<(String, PathBuf)>, Error>

List image files in a COCO ZIP or folder.

Arguments

• path - Path to COCO images folder or ZIP archive

Returns

Vector of (relative_path, absolute_path) for each image

pub fn read_image_from_zip<P: AsRef<Path>>( &self, zip_path: P, image_name: &str, ) -> Result<Vec<u8>, Error>

Read a single image from a ZIP archive.

Arguments

• zip_path - Path to the ZIP archive
• image_name - Name of the image file within the archive

Returns

Raw image bytes

Trait Implementations

impl Default for CocoReader

fn default() -> Self

Returns the “default value” for a type.