Welcome to our instructional guide for inference and realtime DNN vision library for NVIDIA Jetson Nano/TX1/TX2/Xavier NX/AGX 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 detection, 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.
Follow the Hello AI World tutorial for running inference and transfer learning onboard your Jetson, including collecting your own datasets and training your own models. It covers image classification, object detection, and segmentation.
- Hello AI World
- Video Walkthroughs
- API Reference
- Code Examples
- Pre-Trained Models
- System Requirements
- Change Log
> Jetson Nano 2GB and JetPack 4.5 is now supported in the repo.
> Try the new Re-training SSD-Mobilenet object detection tutorial!
> See the Change Log for the latest updates and new features.
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 and object detection applications for Python or C++, 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.
- Transfer Learning with PyTorch
- Classification/Recognition (ResNet-18)
- Object Detection (SSD-Mobilenet)
Below are screencasts of Hello AI World that were recorded for the Jetson AI Certification course:
| Description | Video |
|---|---|
| Hello AI World Setup Download and run the Hello AI World container on Jetson Nano, test your camera feed, and see how to stream it over the network via RTP. |
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| Image Classification Inference Code your own Python program for image classification using Jetson Nano and deep learning, then experiment with realtime classification on a live camera stream. |
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| Training Image Classification Models Learn how to train image classification models with PyTorch onboard Jetson Nano, and collect your own classification datasets to create custom models. |
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| Object Detection Inference Code your own Python program for object detection using Jetson Nano and deep learning, then experiment with realtime detection on a live camera stream. |
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| Training Object Detection Models Learn how to train object detection models with PyTorch onboard Jetson Nano, and collect your own detection datasets to create custom models. |
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| Semantic Segmentation Experiment with fully-convolutional semantic segmentation networks on Jetson Nano, and run realtime segmentation on a live camera stream. |
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Below are links to reference documentation for the C++ and Python libraries from the repo:
| C++ | Python | |
|---|---|---|
| Image Recognition | imageNet |
imageNet |
| Object Detection | detectNet |
detectNet |
| Segmentation | segNet |
segNet |
These libraries are able to be used in external projects by linking to libjetson-inference and libjetson-utils.
Introductory code walkthroughs of using the library are covered during these steps of the Hello AI World tutorial:
Additional C++ and Python samples for running the networks on static images and live camera streams can be found here:
| C++ | Python | |
|---|---|---|
| Image Recognition | imagenet.cpp |
imagenet.py |
| Object Detection | detectnet.cpp |
detectnet.py |
| Segmentation | segnet.cpp |
segnet.py |
note: for working with numpy arrays, see Converting to Numpy Arrays and Converting from Numpy Arrays
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.
The project comes with a number of pre-trained models that are available through the Model Downloader tool:
| 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 |
| 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-v2 |
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 |
| 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 |
- Jetson Nano Developer Kit with JetPack 4.2 or newer (Ubuntu 18.04 aarch64).
- Jetson Nano 2GB Developer Kit with JetPack 4.4.1 or newer (Ubuntu 18.04 aarch64).
- Jetson Xavier NX Developer Kit with JetPack 4.4 or newer (Ubuntu 18.04 aarch64).
- Jetson AGX 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).
The Transfer Learning with PyTorch section of the tutorial speaks from the perspective of running PyTorch onboard Jetson for training DNNs, however the same PyTorch code can be used on a PC, server, or cloud instance with an NVIDIA discrete GPU for faster training.
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
note: the DIGITS/Caffe tutorial from below is deprecated. It's recommended to follow the Transfer Learning with PyTorch tutorial from Hello AI World.
Expand this section to see original DIGITS tutorial (deprecated)
The DIGITS tutorial includes training DNN's 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
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