SSDMobileNetV2

Before you begin, complete the environment setup:

• Host Model Conversion Tool — install NeuroPilot Converter
• Device Environment Setup — install Neuron SDK

Host-Side Model Conversion

Quick Start

If you only need to run the model on the device, you can skip Host-Side conversion and use pre-compiled DLA models.

Clone the Repository

Host PC

git clone https://github.com/Ronin-1124/nio12l-model-zoo.git
cd nio12l-model-zoo

Download and Export Model

tip

If you haven't installed project dependencies, run this in the project root:

pip install -r requirements.txt

Host PC

cd examples/ssd_mobilenet_v2/convert_model
conda activate np8
python download_model.py
python export_onnx.py

Prepare Calibration Data

Host PC

cd ../../..
python prepare_calibration_data.py path=./datasets/coco128/images/train2017 imgsz=300

Convert Model

Host PC

cd examples/ssd_mobilenet_v2/convert_model
python convert_mtk_fp32.py
python convert_mtk_int8.py

After conversion, the following files are generated in examples/ssd_mobilenet_v2/model/:

• int8/ssd_mobilenet_v2_mtk_int8.tflite
• fp32/ssd_mobilenet_v2_mtk_fp32.tflite

Device-Side Deployment

Clone the Repository

Device

git clone https://github.com/Ronin-1124/nio12l-model-zoo.git
cd nio12l-model-zoo

Get Models

Method 1: Download Pre-Compiled DLA (Recommended)

Device

wget -P examples/ssd_mobilenet_v2/model/int8 https://github.com/Ronin-1124/nio12l-model-zoo/releases/download/v2026.05.11-dla/ssd_mobilenet_v2_int8.dla
wget -P examples/ssd_mobilenet_v2/model/fp32 https://github.com/Ronin-1124/nio12l-model-zoo/releases/download/v2026.05.11-dla/ssd_mobilenet_v2_fp32.dla

Method 2: Convert from Host

Transfer Models

Host PC

scp ssd_mobilenet_v2_mtk_int8.tflite <user>@<device>:/path/to/nio12l-model-zoo/examples/ssd_mobilenet_v2/model/int8/
scp ssd_mobilenet_v2_mtk_fp32.tflite <user>@<device>:/path/to/nio12l-model-zoo/examples/ssd_mobilenet_v2/model/fp32/

Convert to DLA

Device

cd examples/ssd_mobilenet_v2/model/int8
ncc-tflite --arch=mdla2.0 -d ssd_mobilenet_v2_int8.dla ssd_mobilenet_v2_mtk_int8.tflite
cd ../fp32
ncc-tflite --arch=mdla2.0 -d ssd_mobilenet_v2_fp32.dla ssd_mobilenet_v2_mtk_fp32.tflite --relax-fp32

Build

Device

cd /path/to/nio12l-model-zoo
cmake -S . -B build
cmake --build build -j

Run

Default uses INT8 model:

Device

./build/ssd_mobilenet_v2_demo

Use FP32 model and specify an image:

Device

./build/ssd_mobilenet_v2_demo --fp32 --image assets/images/bus.jpg

Performance reference (1000-inference average):

Precision	Time (ms)	FPS
INT8	10.006	99.94
FP32	18.299	54.65

Results are saved in outputs/ssd_mobilenet_v2/ (vis/ for visualization images, detections/ for JSON).