Papercut

Papercut is a Rust library and CLI tool for slicing and joining images. It provides functionality to split an image into tiles, save those tiles, and combine them back into a single image. This library is useful for image processing tasks such as creating image grids or splitting large images into smaller parts.

🙏 Acknowledgments

This project is a Rust translation of the Python project image_slicer by Sam Dobson. The functionality and structure of papercut are heavily inspired by the original project. Special thanks to Sam Dobson for creating the original library.

✨ Features

• Slice Images: Split an image into tiles based on the number of tiles or specified rows and columns.
• Save Tiles: Save the sliced tiles to disk with customizable filenames and formats.
• Join Tiles: Combine tiles back into a single image.
• Validation: Perform sanity checks on the number of tiles, rows, and columns.
• Utilities: Includes helper functions for working with filenames and directories.

🛠️ Installation

Add the following to your Cargo.toml to use Papercut as a library:

[dependencies]
papercut = "0.1.2"

🚀 Usage

🖼️ Slice an Image

use papercut::slice;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let tiles = slice("image.png", Some(4), None, None, false)?;
    println!("Generated {} tiles.", tiles.len());
    Ok(())
}

💾 Save Tiles

use papercut::{save_tiles, get_basename};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let tiles = slice("image.png", Some(4), None, None, false)?;
    save_tiles(&mut tiles, &get_basename("image.png"), Some(std::path::Path::new("./output")), "png")?;
    println!("Tiles saved successfully!");
    Ok(())
}

🔄 Join Tiles

use papercut::join;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let tiles = slice("image.png", Some(4), None, None, false)?;
    let combined_image = join(&tiles, 0, 0)?;
    combined_image.save("combined_image.png")?;
    println!("Image combined successfully!");
    Ok(())
}

🖥️ CLI Tool

Papercut includes a CLI tool for slicing images. To use it, build the binary and run it:

cargo run --example slice-image -- --image image.png --num-tiles 4 --dir ./output --format png

Arguments

• --image: Path to the image file to slice (required).
• --num-tiles: Number of tiles to create (optional).
• --dir: Output directory for the tiles (default: ./).
• --format: Output image format (default: png).
• --rows: Number of rows to divide the image (optional, used when --num-tiles is not specified).
• --columns: Number of columns to divide the image (optional, used when --num-tiles is not specified).

📚 Examples

Slice an Image into 4 Tiles

cargo run --example slice-image -- --image image.png --num-tiles 4 --dir ./output --format png

Slice an Image into a Custom Grid

cargo run --example slice-image -- --image image.png --rows 2 --columns 2 --dir ./output --format png

Combine Tiles Back into a Single Image

use papercut::{open_images_in, join};
use std::path::Path;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let tiles = open_images_in(Path::new("./output"))?;
    let combined_image = join(&tiles, 0, 0)?;
    combined_image.save("combined_image.png")?;
    println!("Image combined successfully!");
    Ok(())
}

📜 License

This project is licensed under the MIT License. See the LICENSE file for details.