Deploying Deep Learning

Welcome to our training guide for inference and realtime DNN vision library for NVIDIA Jetson Nano/TX1/TX2/Xavier.

This repo uses NVIDIA TensorRT for efficiently deploying neural networks onto the embedded Jetson platform, improving performance and power efficiency using graph optimizations, kernel fusion, and FP16/INT8 precision.

Vision primitives, such as imageNet for image recognition, detectNet for object localization, and segNet for semantic segmentation, inherit from the shared tensorNet object. Examples are provided for streaming from live camera feed and processing images. See the API Reference section for detailed reference documentation of the C++ and Python libraries.

There are multiple tracks of the tutorial that you can choose to follow, including Hello AI World for running inference and transfer learning onboard your Jetson, or the full Two Days to a Demo tutorial for training on a PC or server with DIGITS.

It's recommended to walk through the Hello AI World module first to familiarize yourself with machine learning and inference with TensorRT, before proceeding to training in the cloud with DIGITS.

Table of Contents

• Hello AI World
• Two Days to a Demo
• API Reference
• Code Examples
• Pre-Trained Models
• System Requirements
• Extra Resources

>   Jetson Nano Developer Kit and JetPack 4.2.1 is now supported in the repo.
>   See our latest technical blog including benchmarks, Jetson Nano Brings AI Computing to Everyone.
>   Hello AI World now supports Python and onboard training with PyTorch!

Hello AI World

Hello AI World can be run completely onboard your Jetson, including inferencing with TensorRT and transfer learning with PyTorch. The inference portion of Hello AI World - which includes coding your own image classification application for C++ or Python, object detection, and live camera demos - can be run on your Jetson in roughly two hours or less, while transfer learning is best left to leave running overnight.

• Setting up Jetson with JetPack
• Building the Project from Source
• Classifying Images with ImageNet
  • Using the Console Program on Jetson
  • Coding Your Own Image Recognition Program (Python)
  • Coding Your Own Image Recognition Program (C++)
  • Running the Live Camera Recognition Demo
• Locating Objects with DetectNet
  • Detecting Objects from the Command Line
  • Running the Live Camera Detection Demo
• Transfer Learning with PyTorch
  • Re-training on the Cat/Dog Dataset
  • Re-training on the PlantCLEF Dataset
  • Collecting your own Datasets

Two Days to a Demo (DIGITS)

The full tutorial includes training in the cloud or PC, and inference on the Jetson with TensorRT, and can take roughly two days or more depending on system setup, downloading the datasets, and the training speed of your GPU.

• DIGITS Workflow
• DIGITS System Setup
• Setting up Jetson with JetPack
• Building the Project from Source
• Classifying Images with ImageNet
  • Using the Console Program on Jetson
  • Coding Your Own Image Recognition Program
  • Running the Live Camera Recognition Demo
  • Re-Training the Network with DIGITS
  • Downloading Image Recognition Dataset
  • Customizing the Object Classes
  • Importing Classification Dataset into DIGITS
  • Creating Image Classification Model with DIGITS
  • Testing Classification Model in DIGITS
  • Downloading Model Snapshot to Jetson
  • Loading Custom Models on Jetson
• Locating Objects with DetectNet
  • Detection Data Formatting in DIGITS
  • Downloading the Detection Dataset
  • Importing the Detection Dataset into DIGITS
  • Creating DetectNet Model with DIGITS
  • Testing DetectNet Model Inference in DIGITS
  • Downloading the Detection Model to Jetson
  • DetectNet Patches for TensorRT
  • Detecting Objects from the Command Line
  • Multi-class Object Detection Models
  • Running the Live Camera Detection Demo on Jetson
• Semantic Segmentation with SegNet
  • Downloading Aerial Drone Dataset
  • Importing the Aerial Dataset into DIGITS
  • Generating Pretrained FCN-Alexnet
  • Training FCN-Alexnet with DIGITS
  • Testing Inference Model in DIGITS
  • FCN-Alexnet Patches for TensorRT
  • Running Segmentation Models on Jetson

API Reference

Below are links to reference documentation for the C++ and Python libraries from the repo:

jetson-inference

	C++	Python
Image Recognition	imageNet	imageNet
Object Detection	detectNet	detectNet
Segmentation	segNet	segNet

jetson-utils

• C++
• Python

These libraries are able to be used in external projects by linking to libjetson-inference and libjetson-utils.

Code Examples

Introductory code walkthroughs of using the library are covered during these steps of the Hello AI World tutorial:

• Coding Your Own Image Recognition Program (Python)
• Coding Your Own Image Recognition Program (C++)

Additional C++ and Python samples for running the networks on static images and live camera streams can be found here:

	Images	Camera
C++ (examples)
Image Recognition	imagenet-console	imagenet-camera
Object Detection	detectnet-console	detectnet-camera
Segmentation	segnet-console	segnet-camera
Python (python/examples)
Image Recognition	imagenet-console.py	imagenet-camera.py
Object Detection	detectnet-console.py	detectnet-camera.py
Segmentation	segnet-console.py	segnet-camera.py

note: for working with numpy arrays, see cuda-from-numpy.py and cuda-to-numpy.py

These examples will automatically be compiled while Building the Project from Source, and are able to run the pre-trained models listed below in addition to custom models provided by the user. Launch each example with --help for usage info.

Pre-Trained Models

The project comes with a number of pre-trained models that are available through the Model Downloader tool:

Image Recognition

Network	CLI argument	NetworkType enum
AlexNet	alexnet	ALEXNET
GoogleNet	googlenet	GOOGLENET
GoogleNet-12	googlenet-12	GOOGLENET_12
ResNet-18	resnet-18	RESNET_18
ResNet-50	resnet-50	RESNET_50
ResNet-101	resnet-101	RESNET_101
ResNet-152	resnet-152	RESNET_152
VGG-16	vgg-16	VGG-16
VGG-19	vgg-19	VGG-19
Inception-v4	inception-v4	INCEPTION_V4

Object Detection

Network	CLI argument	NetworkType enum	Object classes
SSD-Mobilenet-v1	ssd-mobilenet-v1	SSD_MOBILENET_V1	91 (COCO classes)
SSD-Mobilenet-v2	ssd-mobilenet-v2	SSD_MOBILENET_V2	91 (COCO classes)
SSD-Inception-v2	ssd-inception-v1	SSD_INCEPTION_V2	91 (COCO classes)
DetectNet-COCO-Dog	coco-dog	COCO_DOG	dogs
DetectNet-COCO-Bottle	coco-bottle	COCO_BOTTLE	bottles
DetectNet-COCO-Chair	coco-chair	COCO_CHAIR	chairs
DetectNet-COCO-Airplane	coco-airplane	COCO_AIRPLANE	airplanes
ped-100	pednet	PEDNET	pedestrians
multiped-500	multiped	PEDNET_MULTI	pedestrians, luggage
facenet-120	facenet	FACENET	faces

Semantic Segmentation

Dataset	Resolution	CLI Argument	Accuracy	Jetson Nano	Jetson Xavier
Cityscapes	512x256	fcn-resnet18-cityscapes-512x256	83.3%	48 FPS	480 FPS
Cityscapes	1024x512	fcn-resnet18-cityscapes-1024x512	87.3%	12 FPS	175 FPS
Cityscapes	2048x1024	fcn-resnet18-cityscapes-2048x1024	89.6%	3 FPS	47 FPS
DeepScene	576x320	fcn-resnet18-deepscene-576x320	96.4%	26 FPS	360 FPS
DeepScene	864x480	fcn-resnet18-deepscene-864x480	96.9%	14 FPS	190 FPS
Multi-Human	512x320	fcn-resnet18-mhp-512x320	86.5%	34 FPS	370 FPS
Multi-Human	640x360	fcn-resnet18-mhp-512x320	87.1%	23 FPS	325 FPS
Pascal VOC	320x320	fcn-resnet18-voc-320x320	85.9%	45 FPS	508 FPS
Pascal VOC	512x320	fcn-resnet18-voc-512x320	88.5%	34 FPS	375 FPS
SUN RGB-D	512x400	fcn-resnet18-sun-512x400	64.3%	28 FPS	340 FPS
SUN RGB-D	640x512	fcn-resnet18-sun-640x512	65.1%	17 FPS	224 FPS

• If the resolution is omitted from the CLI argument, the lowest resolution model is loaded
• Accuracy indicates the pixel classification accuracy across the model's validation dataset
• Performance is measured for GPU FP16 mode with JetPack 4.2.1, nvpmodel 0 (MAX-N)

Legacy Segmentation Models

Network	CLI Argument	NetworkType enum	Classes
Cityscapes (2048x2048)	fcn-alexnet-cityscapes-hd	FCN_ALEXNET_CITYSCAPES_HD	21
Cityscapes (1024x1024)	fcn-alexnet-cityscapes-sd	FCN_ALEXNET_CITYSCAPES_SD	21
Pascal VOC (500x356)	fcn-alexnet-pascal-voc	FCN_ALEXNET_PASCAL_VOC	21
Synthia (CVPR16)	fcn-alexnet-synthia-cvpr	FCN_ALEXNET_SYNTHIA_CVPR	14
Synthia (Summer-HD)	fcn-alexnet-synthia-summer-hd	FCN_ALEXNET_SYNTHIA_SUMMER_HD	14
Synthia (Summer-SD)	fcn-alexnet-synthia-summer-sd	FCN_ALEXNET_SYNTHIA_SUMMER_SD	14
Aerial-FPV (1280x720)	fcn-alexnet-aerial-fpv-720p	FCN_ALEXNET_AERIAL_FPV_720p	2

Recommended System Requirements

Training GPU: Maxwell, Pascal, Volta, or Turing-based GPU (ideally with at least 6GB video memory)
                        optionally, AWS P2/P3 instance or Microsoft Azure N-series
                        Ubuntu 16.04/18.04 x86_64

Deployment:   Jetson Nano Developer Kit with JetPack 4.2 or newer (Ubuntu 18.04 aarch64).
                        Jetson Xavier Developer Kit with JetPack 4.0 or newer (Ubuntu 18.04 aarch64)
                        Jetson TX2 Developer Kit with JetPack 3.0 or newer (Ubuntu 16.04 aarch64).
                        Jetson TX1 Developer Kit with JetPack 2.3 or newer (Ubuntu 16.04 aarch64).

Note that TensorRT samples from the repo are intended for deployment onboard Jetson, however when cuDNN and TensorRT have been installed on the host side, the TensorRT samples in the repo can be compiled for PC.

Extra Resources

In this area, links and resources for deep learning are listed:

• ros_deep_learning - TensorRT inference ROS nodes
• NVIDIA AI IoT - NVIDIA Jetson GitHub repositories
• Jetson eLinux Wiki - Jetson eLinux Wiki

Legacy Links

Since the documentation has been re-organized, below are links mapping the previous content to the new locations.

       (click on the arrow above to hide this section)

DIGITS Workflow

See DIGITS Workflow

System Setup

See DIGITS Setup

Running JetPack on the Host

See JetPack Setup

Installing Ubuntu on the Host

See DIGITS Setup

Setting up host training PC with NGC container

See DIGITS Setup

Installing the NVIDIA driver

See DIGITS Setup

Installing Docker

See DIGITS Setup

NGC Sign-up

See DIGITS Setup

Setting up data and job directories

See DIGITS Setup

Starting DIGITS container

See DIGITS Setup

Natively setting up DIGITS on the Host

See DIGITS Native Setup

Installing NVIDIA Driver on the Host

See DIGITS Native Setup

Installing cuDNN on the Host

See DIGITS Native Setup

Installing NVcaffe on the Host

See DIGITS Native Setup

Installing DIGITS on the Host

See DIGITS Native Setup

Starting the DIGITS Server

See DIGITS Native Setup

Building from Source on Jetson

See Building the Repo from Source

Cloning the Repo

See Building the Repo from Source

Configuring with CMake

See Building the Repo from Source

Compiling the Project

See Building the Repo from Source

Digging Into the Code

See Building the Repo from Source

Classifying Images with ImageNet

See Classifying Images with ImageNet

Using the Console Program on Jetson

See Classifying Images with ImageNet

Running the Live Camera Recognition Demo

See Running the Live Camera Recognition Demo

Re-training the Network with DIGITS

See Re-Training the Recognition Network

Downloading Image Recognition Dataset

See Re-Training the Recognition Network

Customizing the Object Classes

See Re-Training the Recognition Network

Importing Classification Dataset into DIGITS

See Re-Training the Recognition Network

Creating Image Classification Model with DIGITS

See Re-Training the Recognition Network

Testing Classification Model in DIGITS

See Re-Training the Recognition Network

Downloading Model Snapshot to Jetson

See Downloading Model Snapshots to Jetson

Loading Custom Models on Jetson

See Loading Custom Models on Jetson

Locating Object Coordinates using DetectNet

See Locating Object Coordinates using DetectNet

Detection Data Formatting in DIGITS

See Locating Object Coordinates using DetectNet

Downloading the Detection Dataset

See Locating Object Coordinates using DetectNet

Importing the Detection Dataset into DIGITS

See Locating Object Coordinates using DetectNet

Creating DetectNet Model with DIGITS

See Locating Object Coordinates using DetectNet

Selecting DetectNet Batch Size

See Locating Object Coordinates using DetectNet

Specifying the DetectNet Prototxt

See Locating Object Coordinates using DetectNet

Training the Model with Pretrained Googlenet

See Locating Object Coordinates using DetectNet

Testing DetectNet Model Inference in DIGITS

See Locating Object Coordinates using DetectNet

Downloading the Model Snapshot to Jetson

See Downloading the Detection Model to Jetson

DetectNet Patches for TensorRT

See Downloading the Detection Model to Jetson

Processing Images from the Command Line on Jetson

See Detecting Objects from the Command Line

Launching With a Pretrained Model

See Detecting Objects from the Command Line

Pretrained DetectNet Models Available

See Detecting Objects from the Command Line

Running Other MS-COCO Models on Jetson

See Detecting Objects from the Command Line

Running Pedestrian Models on Jetson

See Detecting Objects from the Command Line

Multi-class Object Detection Models

See Detecting Objects from the Command Line

Running the Live Camera Detection Demo on Jetson

See Running the Live Camera Detection Demo

Image Segmentation with SegNet

See Semantic Segmentation with SegNet

Downloading Aerial Drone Dataset

See Semantic Segmentation with SegNet

Importing the Aerial Dataset into DIGITS

See Semantic Segmentation with SegNet

Generating Pretrained FCN-Alexnet

See Generating Pretrained FCN-Alexnet

Training FCN-Alexnet with DIGITS

See Training FCN-Alexnet with DIGITS

Testing Inference Model in DIGITS

See Training FCN-Alexnet with DIGITS

FCN-Alexnet Patches for TensorRT

See FCN-Alexnet Patches for TensorRT

Running Segmentation Models on Jetson

See Running Segmentation Models on Jetson

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