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Bring Your AI to Any GPU with DirectML


In every one of the billion Windows 10 devices worldwide, there is a GPU for accelerating your AI tasks. From photo editing applications enabling new user experiences through AI to tools that help you train machine learning models for your applications with little effort, DirectML accelerates these experiences by leveraging the computing power of any DirectX 12 GPU. Over a hundred applications already take advantage of DirectML—with over two hundred million hardware accelerated inferences performed daily on Windows. To make it even easier for applications to take advantage of DirectML, we are excited to announce the public release of DirectML as a standalone API for Win32, UWP, and WSL applications in a single NuGet package, Microsoft.AI.DirectML. Let’s look at a few ways DirectML is used today and spark ideas for your own applications.

Model Inference on the Edge with Windows ML

Machine learning is helping people work more efficiently and DirectML provides the performance, conformance, and low-level control developers need to enable these experiences. Frameworks like Windows ML and ONNX Runtime layer on top of DirectMLmaking it easy to integrate high-performance machine learning into your application. 

Once the domain of science fiction, scenarios like “enhancing” an image are now possible with contextually aware algorithms that fill in pixels more intelligently than traditional image processing techniques. DxO’s DeepPRIME technology illustrates the use of neural networks to simultaneously denoise and demosaic digital images. DxO leverages Windows ML and DirectML to harness the performance and quality their users expect. 

Healthcare is another field leveraging machine learning techniques in interesting ways. Consider a sonographer using an ultrasound device to evaluate fetal brain development during their patient’s pregnancy. Acquiring the required planes and taking the required measurements for this is challenging because it requires lots of manual input from the sonographer. This is where GE Healthcare’s Voluson™ Ultrasound Devices comes in handy: pre-trained neural networks help the sonographer using the ultrasound probe automatically segment specific imaging planes from a volume and perform manual measurements. Previously identifying the approriate planes and measurements required time consuming manual adjustments. GE Healthcare relies on Windows ML and DirectML for delivering consistent and reliable results across a broad range of their ultrasound devices.

GE Healthcare’s SonoCNS helping capture measurements required for fetal brain assessment.

An exciting area of growth is at the intersection of machine learning and real-time graphics in video games where performance is critical. Early applications in this area include using neural networks for superior image upscaling and filling in the sampling gaps of ray-traced images; these techniques are making it possible to present high-resolution gameplay without the cost of high-resolution rendering. The DirectML Super Resolution sample showcases how DirectML can integrate seamlessly with these real-time graphics intensive applications.

Example image from the DirectML Super Resolution sample.

Machine learning is a rapidly evolving field, and new applications like these are introduced every day: models are used for transcribing audio, translating hand-written notes into text, fault detection in manufacturing, and many more! DirectML has provided the hardware acceleration support needed for these scenarios since Windows 10 version 1903. Now the DirectML NuGet package offers our latest hardware acceleration investments even sooner to framework and application developers. If your model is representable using the ONNX format, then you too can tap into DirectML.

Training Models with TensorFlow and Lobe

Accelerating inference is where DirectML started: supporting training workloads across the breadth of GPUs in the Windows ecosystem is the next step. In September 2020, we open sourced TensorFlow with DirectML to bring cross-vendor acceleration to the popular TensorFlow framework. This project is all about enabling rapid experimentation and training on your PC, regardless of which GPU you have on your device, with a simple and painless setup process. We also know many machine learning developers depend on tools, libraries, and containerized workloads that only work with Unix-like operating systems, so DirectML runs in both Windows and the Windows Subsystem for Linux. DirectML makes it easy for you to work with the environment and GPU you already have.

Object detection running on a video using the YOLOv4 model through TensorFlow with DirectML.

Machine learning is also becoming increasingly accessible with tools like Lobe – an easy to use app that has everything you need to bring your machine learning ideas to life. To get started, collect and label your images and Lobe will automatically train a custom machine learning model for you. On Windows, Lobe uses DirectML to deliver great performance across a wide range of GPUs. When training is done, you can try out your model and ship it to any platform you choose.

Getting Started with DirectML

If you’re a developer looking to benefit from hardware accelerated machine learning through DirectML, get started today with the framework, package, or application that works best for you:

In addition to all of the investments we’ve updated our documentation bringing more detail than ever before along with new code samples and learning resources, making it easier to integrate DirectML with your application. We’ve also added new content for developers to the DirectML GitHub repo:

· DirectMLX, a new C++ library that wraps DirectML to enable easier and simpler usage, especially for combining operators into blocks or even into complete models.

· PyDirectML, a Python binding to quickly experiment with DirectML and the Python samples without writing a full C++ sample.

· Sample applications in both C++ and Python, including a full end-to-end implementation of real-time object detection using YOLOv4.

This post only scratches the surface of what’s possible with machine learning and DirectML, and we’re excited to see where developers take DirectML next! Stay tuned to the DirectML GitHub for new resources and future updates on the investments we’re making.



This post was written by Windows AI Platform Team and was first posted to Windows Blog



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