SynthDet Viewer App for iOS

Test your machine learning models generated with Unity SynthDet in real life using Unity SynthDet Viewer! This app uses your device’s camera to send a stream of pictures to your machine learning models. Host your machine learning models online, and point the app to your server. Bounding boxes will appear around everything your ML models detect. Capture, share, and export the results of your object detection.

This is an app for iPhone and iPad that displays results of object detection machine learning models in augmented reality. For AR, this app uses Unity AR Foundation. Bounding boxes of detected objects are added to points in the real world through AR. The app relies on a web API for prediction. We use TorchServe to host our SynthDet model. The app consists of two parts: the Unity component and native iOS component.

Features

• Augmented Reality rendering of bounding boxes around your ML model's predictions
• Customizable experience with ability to change minimum prediction score, and easily editable model list
• Switch models in the Viewer live, for easy comparison in training between many models
• Capture, share, and export the results of your object detection

Usage

Section	Steps
Dependencies	TorchServe REST server: Host your SynthDet trained model using perception-synthdet-torchserve. You can also host your own object dection model.
Installation	Install the app from the App Store (recommended), or Build from source with the steps in How to Build
Run	Run the app, and tap on Settings in the top right corner. Tap Edit Models, and then Add Model Endpoint. In the row for your new model endpoint, enter a name (this can be anything you want, something to remember the model by). Then, enter the URL where the app should send prediction requests. If you don't want to type in a long URL on your iOS device, feel free to use the qr.sh script in perception-synthdet-torchserve, which will generate QR codes for the model endpoints it exposes. Tap Done Editing, then Done. Select your model by tapping Choose Model at the bottom of your screen. If the button displays the name of one of your models, that model is selected. Point your device at detectable objects, and watch the boxes be drawn!

Button Functions

Button	What it does	Where it is
Choose Model / {model name}	Tap to choose the active model	Bottom center of the main screen
Shutter Button	Circular button that takes a picture of the current image on screen, and saves a COCO export of the scene as well, for data analysis	On the middle right side of the screen
Share Captures	Shares a folder of all captures taken with the Shutter Button. This uses the iOS Share Sheet, so you can share your captures like normal photos on iOS, sending them via AirDrop, Google Drive, email, text, etc	Settings screen
Delete All Captures	Deletes all captures taken	Settings screen
QR	Reads current camera image for QR codes; if it finds one, places the text in the URL box next to it	Settings screen, on each model row

Development

Check out the guide for developing new features.

License

• License