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CAPTCHA library written in Rust\n[![Build Status](https://travis-ci.org/daniel-e/captcha.svg?branch=master)](https://travis-ci.org/daniel-e/captcha)\n[![GitHub license](https://img.shields.io/github/license/daniel-e/captcha)](https://github.com/daniel-e/captcha/blob/master/LICENSE.md)\n[![GitHub stars](https://img.shields.io/github/stars/daniel-e/captcha)](https://github.com/daniel-e/captcha/stargazers)\n[![dependency status](https://deps.rs/repo/github/daniel-e/captcha/status.svg)](https://deps.rs/repo/github/daniel-e/captcha)\n\nA library to generate CAPTCHAs like these:\n\n![captcha](doc/captcha3.png) \u0026nbsp; ![captcha](doc/captcha2.png) \u0026nbsp; ![captcha](doc/captcha_mila_medium.png)\n\n### Requirements\n\nRust (https://www.rust-lang.org/)\n\n### Documentation\n\nhttps://docs.rs/captcha\n\n## Usage\n\nAdd the following dependency to the `Cargo.toml` file:\n\n```toml\n[dependencies]\ncaptcha = \"*\"\n```\n\nIn your source file do:\n\n```rust\nextern crate captcha;\n\nuse captcha::Captcha;\nuse captcha::filters::Noise;\nuse std::path::Path;\n\nfn main() {\n    Captcha::new()\n        .add_chars(5)\n        .apply_filter(Noise::new(0.1))\n        .view(220, 120)\n        .save(Path::new(\"/tmp/captcha.png\"))\n        .expect(\"save failed\");\n}\n```\n\n## Running the example\n\n    git clone git@github.com:daniel-e/captcha.git\n    cd captcha\n    cargo run --example captcha\n\nThis example creates 12 CAPTCHA images (PNG images) in the current directory.\n\nThe generated images will look like the following three images:\n\n![captcha](doc/captcha1.png) \u0026nbsp; 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