Book Image

Intelligent Mobile Projects with TensorFlow

By : Jeff Tang
Book Image

Intelligent Mobile Projects with TensorFlow

By: Jeff Tang

Overview of this book

As a developer, you always need to keep an eye out and be ready for what will be trending soon, while also focusing on what's trending currently. So, what's better than learning about the integration of the best of both worlds, the present and the future? Artificial Intelligence (AI) is widely regarded as the next big thing after mobile, and Google's TensorFlow is the leading open source machine learning framework, the hottest branch of AI. This book covers more than 10 complete iOS, Android, and Raspberry Pi apps powered by TensorFlow and built from scratch, running all kinds of cool TensorFlow models offline on-device: from computer vision, speech and language processing to generative adversarial networks and AlphaZero-like deep reinforcement learning. You’ll learn how to use or retrain existing TensorFlow models, build your own models, and develop intelligent mobile apps running those TensorFlow models. You'll learn how to quickly build such apps with step-by-step tutorials and how to avoid many pitfalls in the process with lots of hard-earned troubleshooting tips.
Table of Contents (14 chapters)

Using YOLO2–another object-detection model

As we mentioned in the first section, YOLO2 (https://pjreddie.com/darknet/yolo) is another cool object-detection model using a different approach from the RCNN family. It uses a single neural network to divide an input image into fixed-size regions (but no region proposals as in the RCNN-family methods) and predict bounding boxes, classes, and probabilities for each region.

The TensorFlow Android example app has sample code for using a pre-trained YOLO model, but there’s no iOS example. As YOLO2 is one of the fastest object-detection models and also pretty accurate (see the mAP comparison of it with SSD models at its website), it’s worth taking a look at what it takes to use it in an iOS app.

YOLO uses a unique open source neural network framework called Darknet (https://pjreddie.com/darknet) to train its models....