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OpenVINO™ Model Server Quickstart

The OpenVINO Model Server requires a trained model in Intermediate Representation (IR) format on which it performs inference. Options to download appropriate models include:

  • Downloading models from the Open Model Zoo
  • Using the Model Optimizer to convert models to the IR format from formats like TensorFlow*, ONNX*, Caffe*, MXNet* or Kaldi*.

This guide uses the face detection model.

Use the steps in this guide to quickly start using OpenVINO™ Model Server. In these steps, you:

  • Prepare Docker*
  • Download and build the OpenVINO™ Model server
  • Download a model
  • Start the model server container
  • Download the example client components
  • Download data for inference
  • Run inference
  • Review the results

Step 1: Prepare Docker

To see if you have Docker already installed and ready to use, test the installation:

$ docker run hello-world

If you see a test image and an informational message, Docker is ready to use. Go to download and build the OpenVINO Model Server. If you don't see the test image and message:

  1. Install the Docker* Engine on your development machine.
  2. Use the Docker post-installation steps.

Continue to Step 2 to download and build the OpenVINO Model Server.

Step 2: Download and Build the OpenVINO Model Server

  1. Download the Docker* image that contains the OpenVINO Model Server. This image is available from DockerHub:
docker pull openvino/model_server:latest

or build the docker image openvino/model_server:latest with a command:

make docker_build

Step 3: Download a Model

Download the model components to the model/1 directory. Example command using curl:

curl --create-dirs https://download.01.org/opencv/2021/openvinotoolkit/2021.1/open_model_zoo/models_bin/1/face-detection-retail-0004/FP32/face-detection-retail-0004.xml https://download.01.org/opencv/2021/openvinotoolkit/2021.1/open_model_zoo/models_bin/1/face-detection-retail-0004/FP32/face-detection-retail-0004.bin -o model/1/face-detection-retail-0004.xml -o model/1/face-detection-retail-0004.bin

Step 4: Start the Model Server Container

Start the Model Server container:

docker run -d -u $(id -u):$(id -g) -v $(pwd)/model:/models/face-detection -p 9000:9000 openvino/model_server:latest \
--model_path /models/face-detection --model_name face-detection --port 9000 --log_level DEBUG --shape auto

The Model Server expects models in a defined folder structure. The folder with the models is mounted as /models/face-detection/1, such as:

models/
└── face-detection
	└── 1
		├── face-detection-retail-0004.bin
		└── face-detection-retail-0004.xml

Use these links for more information about the folder structure and how to deploy more than one model at the time:

Step 5: Download the Example Client Components

Model scripts are available to provide an easy way to access the Model Server. This example uses a face detection script and uses curl to download components.

  1. Use this command to download all necessary components:
curl https://raw.githubusercontent.com/openvinotoolkit/model_server/master/example_client/client_utils.py -o client_utils.py https://raw.githubusercontent.com/openvinotoolkit/model_server/master/example_client/face_detection.py -o face_detection.py  https://raw.githubusercontent.com/openvinotoolkit/model_server/master/example_client/client_requirements.txt -o client_requirements.txt

For more information:

Step 6: Download Data for Inference

  1. Download example images for inference. This example uses a file named people1.jpeg.
  2. Put the image in a folder by itself. The script runs inference on all images in the folder.
curl --create-dirs https://raw.githubusercontent.com/openvinotoolkit/model_server/master/example_client/images/people/people1.jpeg -o images/people1.jpeg

Step 7: Run Inference

  1. Go to the folder in which you put the client script.

  2. Install the dependencies:

pip install -r client_requirements.txt
  1. Create a folder in which inference results will be put:
mkdir results
  1. Run the client script:
python face_detection.py --batch_size 1 --width 600 --height 400 --input_images_dir images --output_dir results

Step 8: Review the Results

In the results folder, look for an image that contains the inference results. The result is the modified input image with bounding boxes indicating detected faces.