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Deployment of a People Counter App at the Edge

Details
Programming Language: Python 3.5 or 3.6

people-counter-python

What it Does

The people counter application is a smart video IoT solution using Intel® hardware and software tools. The app will detect people in a designated area, providing the number of people in the frame, average duration of people in frame, and total count.

How it Works

The counter will use the Inference Engine included in the Intel® Distribution of OpenVINO™ Toolkit. The model used should be able to identify people in a video frame. The app should count the number of people in the current frame, the duration that a person is in the frame (time elapsed between entering and exiting a frame) and the total count of people. It then sends the data to a local web server using the Paho MQTT Python package.

You will choose a model to use and convert it with the Model Optimizer.

architectural diagram

Requirements

Hardware

  • 6th to 10th generation Intel® Core™ processor with Iris® Pro graphics or Intel® HD Graphics.
  • OR use of Intel® Neural Compute Stick 2 (NCS2)
  • OR Udacity classroom workspace for the related course

Software

  • Intel® Distribution of OpenVINO™ toolkit 2019 R3 release
  • Node v6.17.1
  • Npm v3.10.10
  • CMake
  • MQTT Mosca server

Setup

Install Intel® Distribution of OpenVINO™ toolkit

Utilize the classroom workspace, or refer to the relevant instructions for your operating system for this step.

Install Nodejs and its dependencies

Utilize the classroom workspace, or refer to the relevant instructions for your operating system for this step.

Install npm

There are three components that need to be running in separate terminals for this application to work:

  • MQTT Mosca server
  • Node.js* Web server
  • FFmpeg server

From the main directory:

  • For MQTT/Mosca server:

    cd webservice/server
npm install

  • For Web server:

    cd ../ui
npm install

    Note: If any configuration errors occur in mosca server or Web server while using npm install, use the below commands:

    sudo npm install npm -g 
rm -rf node_modules
npm cache clean
npm config set registry "http://registry.npmjs.org"
npm install

Run the application

From the main directory:

Step 1 - Start the Mosca server

cd webservice/server/node-server
node ./server.js

You should see the following message, if successful:

Mosca server started.

Step 2 - Start the GUI

Open new terminal and run below commands.

cd webservice/ui
npm run dev

You should see the following message in the terminal.

webpack: Compiled successfully

Step 3 - FFmpeg Server

Open new terminal and run the below commands.

sudo ffserver -f ./ffmpeg/server.conf

Step 4 - Run the code

Open a new terminal to run the code.

Setup the environment

You must configure the environment to use the Intel® Distribution of OpenVINO™ toolkit one time per session by running the following command:

source /opt/intel/openvino/bin/setupvars.sh -pyver 3.5

You should also be able to run the application with Python 3.6, although newer versions of Python will not work with the app.

Running on the CPU

When running Intel® Distribution of OpenVINO™ toolkit Python applications on the CPU, the CPU extension library is required. This can be found at:

/opt/intel/openvino/deployment_tools/inference_engine/lib/intel64/

Depending on whether you are using Linux or Mac, the filename will be either libcpu_extension_sse4.so or libcpu_extension.dylib, respectively. (The Linux filename may be different if you are using a AVX architecture)

Though by default application runs on CPU, this can also be explicitly specified by -d CPU command-line argument:

python <Project_dir>/main.py -i <Project_dir>/resources/Pedestrian_Detect_2_1_1.mp4  -m <Project_dir>/model/ssd_mobilenet_v2_coco_2018_03_29/frozen_inference_graph.xml| ffmpeg -v warning -f rawvideo -pixel_format bgr24 -video_size 768x432 -framerate 24 -i - http://0.0.0.0:3004/fac.ffm`

If working locally, to see the output on a web based interface, open the link http://0.0.0.0:3004 in a browser.

Running on the Intel® Neural Compute Stick

To run on the Intel® Neural Compute Stick, use the -d MYRIAD command-line argument:

python3.5 main.py -d MYRIAD -i resources/Pedestrian_Detect_2_1_1.mp4 -m your-model.xml -pt 0.6 | ffmpeg -v warning -f rawvideo -pixel_format bgr24 -video_size 768x432 -framerate 24 -i - http://0.0.0.0:3004/fac.ffm

To see the output on a web based interface, open the link http://0.0.0.0:3004 in a browser.

Note: The Intel® Neural Compute Stick can only run FP16 models at this time. The model that is passed to the application, through the -m <path_to_model> command-line argument, must be of data type FP16.

Using a camera stream instead of a video file

To get the input video from the camera, use the -i CAM command-line argument. Specify the resolution of the camera using the -video_size command line argument.

For example:

python main.py -i CAM -m your-model.xml -l /opt/intel/openvino/deployment_tools/inference_engine/lib/intel64/libcpu_extension_sse4.so -d CPU -pt 0.6 | ffmpeg -v warning -f rawvideo -pixel_format bgr24 -video_size 768x432 -framerate 24 -i - http://0.0.0.0:3004/fac.ffm

To see the output on a web based interface, open the link http://0.0.0.0:3004 in a browser.

Note: User has to give -video_size command line argument according to the input as it is used to specify the resolution of the video or image file.

A Note on Running Locally

The servers herein are configured to utilize the Udacity classroom workspace. As such, to run on your local machine, you will need to change the below file:

webservice/ui/src/constants/constants.js

The CAMERA_FEED_SERVER and MQTT_SERVER both use the workspace configuration. You can change each of these as follows:

CAMERA_FEED_SERVER: "http://localhost:3004"
...
MQTT_SERVER: "ws://localhost:3002"

License

Copyright (c) 2018 Intel Corporation. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit person to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.