Leaf is a open source framework for machine intelligence, sharing concepts from TensorFlow and Caffe.

Leaf was started at Autumn to bridge the gap between research and production of deep learning networks. Leaf is written in Rust, a language which is well suited for state-of-the-art machine learning. It allows for the performance, memory-security, and extensibility, that other frameworks (TensorFlow, Caffe, Theano) only gain by combining high-level languages (Python) with low-level languages (C, C++).

The architecture of Leaf's network is composed of layers, which represent operations over n-dimensional numerical inputs into the network, known as Blobs. This expressive and highly modular architecture allows you to deploy and distribute your network over multiple device types, such as servers, desktops, mobile, and use a variable number of CPUs or GPUs for computation.
Layers usually implement mathematical operations, but can be used for many more such as feeding in data, logging, or returning results. You can use the layers that ship with Leaf (e.g. Convolutional, ReLU, RNN, SVM, etc.) or thanks to Rust, easily extend Leaf with your own layers.

Leaf strives for leading-edge performance (benchmarks are next), while providing a clear and expressive architecture that creates - as we hope - an innovative and active community around machine intelligence and fuels future research.

We see Leaf as the core of constructing high-performance learning networks that can be distributed and extended with other libraries e.g. for reinforcement learning (Q-learning), visualizing and monitoring the learning of the network, automated preprocessing of non-numerical data or scale, deploy and distribute your network to the cloud.

For more information,

• see Leafs' Documentation or
• the Q&A

Disclaimer: Leaf is currently in a very early and heavy stage of development. If you are experiencing any bugs that are not due to not yet implemented features, feel free to create a issue.

If you're using Cargo, just add Leaf to your Cargo.toml:

[dependencies]
leaf = "0.0.1"

If you're using Cargo Edit, you can call:

$ cargo add leaf

You can find examples at Leaf Examples. Leaf Examples provides a CLI, so you can run popular Deep Learning examples with Leaf right from the command line.

We design Leaf and all other crates for machine learning completely modular and as extensible as possible. More helpful crates you can use with Leaf:

• Cuticula: Preprocessing Framework for Machine Learning
• Phloem: Universal CPU/GPU Data Blob for Machine Learning

Want to contribute? Awesome! We have instructions to help you get started contributing code or documentation.

Leaf has a near real-time collaboration culture and happens here on Github and on the Leaf Gitter Channels. You can also reach out to the Maintainers {@MJ, @hobofan}.

The current hardware just recently became strong enough to support real-world usage of machine intelligence e.g. super-human image recognition, self-driving cars, etc.. For taking advantage of the computational power of the underlying hardware from GPUs to clusters you need a low-level language that allows for control of memory. But to make machine intelligence widely accessible you want to have a high-level comfortable abstraction over the underlying hardware.

Rust allows us to cross this chasm. Rust promises performance like C/C++ but with safe memory-control. For now we can use C Rust wrappers for performant libraries. But in the future Rust rewritten libraries will have the advantage of zero-cost safe memory control, that will make large, parallel learning networks over CPUs and GPUs more feasible and more reliable to develop. The development of these future libraries is already under way e.g. Glium.

On the usability side, Rust offers a trait-system, that makes it easy for researchers and hobbyists alike to extend and work with Leaf as if Leaf would have been written in a higher-level language such as Ruby, Python, Java, etc.

We develop Leaf under the MIT open source license, which, paired with the easy access and performance, makes Leaf a first-choice option for researchers and developers alike.

We believe strongly in machine intelligence and think that it will have a major impact on future innovations, products and our society. At Autumn, we experienced a lack of common and well engineered tools for machine learning and therefore started to create a modular toolbox for machine learning in Rust. We hope, that with making our work open source, we will speed-up research and development of production-ready applications and make their work easier as well.

Autumn is a startup working on automated decision making. Autumn was started by two developers MJ and Max. The startup is located in Berlin and recently received a pre-seed investment from Axel Springer and Plug&Play.

Leaf is released under the MIT License.