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How to Develop a Facial Expression Recognition Application in Python: A Step-by-Step Guide

Bora Erbaşoğlu
4 min readSep 8, 2024

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The study of facial expressions in computer vision and artificial intelligence is a fascinating field. It makes it possible for computers to deduce emotions from facial expressions. This talent can be used in a number of fields, including interactive gaming, user experience testing, healthcare, and security. This post will explain how to use Python and libraries like OpenCV, Dlib, and Deep Learning models to create a simple facial expression detection application.

1. Setting Up the Environment

To begin with, you need to install the necessary libraries. You can install them using pip:

pip install opencv-python dlib keras tensorflow
  • OpenCV: A popular library for real-time computer vision tasks.
  • Dlib: Used for facial landmark detection.
  • Keras & TensorFlow: For implementing deep learning models for expression recognition.

2. Detecting Faces Using OpenCV

Initially, we will utilize OpenCV to identify faces in a live video stream (originating from a webcam or video file). For face detection, OpenCV offers a pre-trained Haar Cascade model.

import cv2

# Load…

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Bora Erbaşoğlu
Bora Erbaşoğlu

Written by Bora Erbaşoğlu

Predictive Development Manager, AI Researcher, Python,React, React Native, PHP, Java Expert professionally since 1999. Open for consulting & dev projects

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