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Face Recognition and OpenCV

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by Satendra dot icon Updated: Aug 3, 2022

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What is face recognition and how does it work? First of all what is recognition? Let's take an example, the first thing that comes to mind when you see an orange fruit is that it is an orange fruit. In simple terms, your mind telling you that this is an orange fruit, is recognition. So, what exactly is face recognition? I'm confident you guessed correctly. You identify your friend Bob when you see him strolling down the street or when you see a photo of him. But, more importantly, how does face recognition work? It's easy to use and understand. Consider this scenario: you meet someone for the first time in your life and you don't recognize him, right? You examine his face, eyes, nose, lips, color, and overall appearance while he speaks or shakes your hand. This is your mind learning or training to recognize that person's face by collecting face data.  The next question is how to implement face recognition using OpenCV and other open source libraries? So, there you have it. You would argue that human minds can easily do these things, but programming them into a machine is tough. Don't worry, it's not the case. Face recognition is as simple as it appears thanks to different open source libraries . Face recognition follows the same coding techniques as the real-life example we examined earlier.

Libraries for Image Pre-processing

Following are Image Pre Processing Libraries. By annotating and labelling photos, these libraries aid in data preparation. Additionally, photos are processed in order to run a machine learning algorithm.

impyby lozuwa

Python doticonstar image 110 doticonVersion:impy-0.1doticon
License: Permissive (Apache-2.0)

Impy is a Python3 library with features that help you in your computer vision tasks.

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            impyby lozuwa

            Python doticon star image 110 doticonVersion:impy-0.1doticon License: Permissive (Apache-2.0)

            Impy is a Python3 library with features that help you in your computer vision tasks.
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                      nsvisionby Nsemble

                      Python doticonstar image 5 doticonVersion:v0.0.9doticon
                      License: Permissive (MIT)

                      nsvision is a python library and command line tool build for simplifying image pre-processing / post-processing. We have optimised the library for reducing the code work while working on image / video processing for data science related work.

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                                nsvisionby Nsemble

                                Python doticon star image 5 doticonVersion:v0.0.9doticon License: Permissive (MIT)

                                nsvision is a python library and command line tool build for simplifying image pre-processing / post-processing. We have optimised the library for reducing the code work while working on image / video processing for data science related work.
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                                          hocroxby imdeepmind

                                          Python doticonstar image 1 doticonVersion:v0.3.0doticon
                                          License: Permissive (MIT)

                                          Hocrox: An image preprocessing and augmentation library with Keras like interface.

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                                                    hocroxby imdeepmind

                                                    Python doticon star image 1 doticonVersion:v0.3.0doticon License: Permissive (MIT)

                                                    Hocrox: An image preprocessing and augmentation library with Keras like interface.
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                                                              image-preprocessingby eleijonmarck

                                                              Python doticonstar image 1 doticonVersion:Currentdoticon
                                                              License: Permissive (MIT)

                                                              A library of preprocessing images for Keras. Mostly for educational purposes and my own. :)

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                                                                        image-preprocessingby eleijonmarck

                                                                        Python doticon star image 1 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                        A library of preprocessing images for Keras. Mostly for educational purposes and my own. :)
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                                                                                  klar-EDAby klarEDA

                                                                                  Python doticonstar image 13 doticonVersion:Currentdoticon
                                                                                  License: Permissive (MIT)

                                                                                  A python library for automated exploratory data analysis

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                                                                                            klar-EDAby klarEDA

                                                                                            Python doticon star image 13 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                            A python library for automated exploratory data analysis
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                                                                                                      python-wsi-preprocessingby deroneriksson

                                                                                                      Python doticonstar image 201 doticonVersion:Currentdoticon
                                                                                                      no licences License: No License (null)

                                                                                                      Python Whole Slide Image Preprocessing

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                                                                                                                python-wsi-preprocessingby deroneriksson

                                                                                                                Python doticon star image 201 doticonVersion:Currentdoticonno licences License: No License

                                                                                                                Python Whole Slide Image Preprocessing
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                                                                                                                          Libraries for Face recognition models

                                                                                                                          There are various libraries for implementing face recognition models, important and easy to use are listed here.

                                                                                                                          Python doticonstar image 2420 doticonVersion:Currentdoticon
                                                                                                                          License: Permissive (MIT)

                                                                                                                          🔥🔥High-Performance Face Recognition Library on PyTorch🔥🔥

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                                                                                                                                    face.evoLVe.PyTorchby ZhaoJ9014

                                                                                                                                    Python doticon star image 2420 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                                                                    🔥🔥High-Performance Face Recognition Library on PyTorch🔥🔥
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                                                                                                                                              deepfaceby serengil

                                                                                                                                              Python doticonstar image 5892 doticonVersion:Currentdoticon
                                                                                                                                              License: Permissive (MIT)

                                                                                                                                              A Lightweight Face Recognition and Facial Attribute Analysis (Age, Gender, Emotion and Race) Library for Python

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                                                                                                                                                        deepfaceby serengil

                                                                                                                                                        Python doticon star image 5892 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                                                                                        A Lightweight Face Recognition and Facial Attribute Analysis (Age, Gender, Emotion and Race) Library for Python
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                                                                                                                                                                  pazby oarriaga

                                                                                                                                                                  Python doticonstar image 457 doticonVersion:0.1.10doticon
                                                                                                                                                                  License: Permissive (MIT)

                                                                                                                                                                  Hierarchical perception library in Python for pose estimation, object detection, instance segmentation, keypoint estimation, face recognition, etc.

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                                                                                                                                                                            pazby oarriaga

                                                                                                                                                                            Python doticon star image 457 doticonVersion:0.1.10doticon License: Permissive (MIT)

                                                                                                                                                                            Hierarchical perception library in Python for pose estimation, object detection, instance segmentation, keypoint estimation, face recognition, etc.
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                                                                                                                                                                                      libfaceidby richmondu

                                                                                                                                                                                      Python doticonstar image 362 doticonVersion:libfaceid_0.0.2doticon
                                                                                                                                                                                      License: Permissive (MIT)

                                                                                                                                                                                      libfaceid is a research framework for prototyping of face recognition solutions. It seamlessly integrates multiple detection, recognition and liveness models w/ speech synthesis and speech recognition.

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                                                                                                                                                                                                libfaceidby richmondu

                                                                                                                                                                                                Python doticon star image 362 doticonVersion:libfaceid_0.0.2doticon License: Permissive (MIT)

                                                                                                                                                                                                libfaceid is a research framework for prototyping of face recognition solutions. It seamlessly integrates multiple detection, recognition and liveness models w/ speech synthesis and speech recognition.
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                                                                                                                                                                                                          face-rec-toolsby sashacmc

                                                                                                                                                                                                          Python doticonstar image 12 doticonVersion:v1.0.0doticon
                                                                                                                                                                                                          License: Strong Copyleft (GPL-3.0)

                                                                                                                                                                                                          Media library face recognition tools

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                                                                                                                                                                                                                    face-rec-toolsby sashacmc

                                                                                                                                                                                                                    Python doticon star image 12 doticonVersion:v1.0.0doticon License: Strong Copyleft (GPL-3.0)

                                                                                                                                                                                                                    Media library face recognition tools
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                                                                                                                                                                                                                              Facenet

                                                                                                                                                                                                                              Facenet an important model for face recognition. To learn more click here!

                                                                                                                                                                                                                              facenetby davidsandberg

                                                                                                                                                                                                                              Python doticonstar image 12954 doticonVersion:Currentdoticon
                                                                                                                                                                                                                              License: Permissive (MIT)

                                                                                                                                                                                                                              Face recognition using Tensorflow

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                                                                                                                                                                                                                                        facenetby davidsandberg

                                                                                                                                                                                                                                        Python doticon star image 12954 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                                                                                                                                                                        Face recognition using Tensorflow
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                                                                                                                                                                                                                                                  Facial-Emotion-Recognition using Images

                                                                                                                                                                                                                                                  Images of faces with happy/sad emotion are provided in the data. Using PCA and LDA we can create a face emotion recognizing model based on dimensionality reduction technique. Check the source code here: Visit to my repo!

                                                                                                                                                                                                                                                  scipyby scipy

                                                                                                                                                                                                                                                  Python doticonstar image 10988 doticonVersion:v1.10.1doticon
                                                                                                                                                                                                                                                  License: Permissive (BSD-3-Clause)

                                                                                                                                                                                                                                                  SciPy library main repository

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                                                                                                                                                                                                                                                            scipyby scipy

                                                                                                                                                                                                                                                            Python doticon star image 10988 doticonVersion:v1.10.1doticon License: Permissive (BSD-3-Clause)

                                                                                                                                                                                                                                                            SciPy library main repository
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                                                                                                                                                                                                                                                                      Human Activity Recognition

                                                                                                                                                                                                                                                                      Dataset link: Dataset! Classifying activity(WALKING, WALKINGUPSTAIRS, WALKINGDOWNSTAIRS, SITTING, STANDING, LAYING) of person based on smartphone sensor data using various classical machine learning models like SVM, KNN, Logistic regression and comparing there results. Check the code on: Visit to my repo! Following are libraries which are useful to implement the HAR model and doing preprocessing tasks.

                                                                                                                                                                                                                                                                      scikit-learnby scikit-learn

                                                                                                                                                                                                                                                                      Python doticonstar image 53544 doticonVersion:1.2.2doticon
                                                                                                                                                                                                                                                                      License: Permissive (BSD-3-Clause)

                                                                                                                                                                                                                                                                      scikit-learn: machine learning in Python

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                                                                                                                                                                                                                                                                                scikit-learnby scikit-learn

                                                                                                                                                                                                                                                                                Python doticon star image 53544 doticonVersion:1.2.2doticon License: Permissive (BSD-3-Clause)

                                                                                                                                                                                                                                                                                scikit-learn: machine learning in Python
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                                                                                                                                                                                                                                                                                          numpyby numpy

                                                                                                                                                                                                                                                                                          Python doticonstar image 23036 doticonVersion:v1.24.2doticon
                                                                                                                                                                                                                                                                                          License: Permissive (BSD-3-Clause)

                                                                                                                                                                                                                                                                                          The fundamental package for scientific computing with Python.

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                                                                                                                                                                                                                                                                                                    numpyby numpy

                                                                                                                                                                                                                                                                                                    Python doticon star image 23036 doticonVersion:v1.24.2doticon License: Permissive (BSD-3-Clause)

                                                                                                                                                                                                                                                                                                    The fundamental package for scientific computing with Python.
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                                                                                                                                                                                                                                                                                                              pandasby pandas-dev

                                                                                                                                                                                                                                                                                                              Python doticonstar image 37428 doticonVersion:v2.0.0rc1doticon
                                                                                                                                                                                                                                                                                                              License: Permissive (BSD-3-Clause)

                                                                                                                                                                                                                                                                                                              Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more

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                                                                                                                                                                                                                                                                                                                        pandasby pandas-dev

                                                                                                                                                                                                                                                                                                                        Python doticon star image 37428 doticonVersion:v2.0.0rc1doticon License: Permissive (BSD-3-Clause)

                                                                                                                                                                                                                                                                                                                        Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more
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                                                                                                                                                                                                                                                                                                                                  matplotlib.pyplotby yadavrahyl2k15

                                                                                                                                                                                                                                                                                                                                  Jupyter Notebook doticonstar image 0 doticonVersion:Currentdoticon
                                                                                                                                                                                                                                                                                                                                  no licences License: No License (null)

                                                                                                                                                                                                                                                                                                                                  Information about matplot lib module and different graphs

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                                                                                                                                                                                                                                                                                                                                            matplotlib.pyplotby yadavrahyl2k15

                                                                                                                                                                                                                                                                                                                                            Jupyter Notebook doticon star image 0 doticonVersion:Currentdoticonno licences License: No License

                                                                                                                                                                                                                                                                                                                                            Information about matplot lib module and different graphs
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                                                                                                                                                                                                                                                                                                                                                      Unsupervised Sentiment Analysis

                                                                                                                                                                                                                                                                                                                                                      Implemented sentiment analysis model for movie reviews by extraction of TF-IDF features and Gaussian Mixture Models (GMMs) in python. Dataset: Corpus with 1000 movie reviews. Implementing GMMs and TF-IDF with the help of open source libraries we can develop a unsupervised Sentiment Analysis Model. Check the code on: Visit to my repo! Following are open source libraries which are useful to implement this model.

                                                                                                                                                                                                                                                                                                                                                      nltkby nltk

                                                                                                                                                                                                                                                                                                                                                      Python doticonstar image 11684 doticonVersion:Currentdoticon
                                                                                                                                                                                                                                                                                                                                                      License: Permissive (Apache-2.0)

                                                                                                                                                                                                                                                                                                                                                      NLTK Source

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                                                                                                                                                                                                                                                                                                                                                                nltkby nltk

                                                                                                                                                                                                                                                                                                                                                                Python doticon star image 11684 doticonVersion:Currentdoticon License: Permissive (Apache-2.0)

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                                                                                                                                                                                                                                                                                                                                                                          nltk-trainerby japerk

                                                                                                                                                                                                                                                                                                                                                                          Python doticonstar image 735 doticonVersion:Currentdoticon
                                                                                                                                                                                                                                                                                                                                                                          License: Permissive (Apache-2.0)

                                                                                                                                                                                                                                                                                                                                                                          Train NLTK objects with zero code

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                                                                                                                                                                                                                                                                                                                                                                                    nltk-trainerby japerk

                                                                                                                                                                                                                                                                                                                                                                                    Python doticon star image 735 doticonVersion:Currentdoticon License: Permissive (Apache-2.0)

                                                                                                                                                                                                                                                                                                                                                                                    Train NLTK objects with zero code
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                                                                                                                                                                                                                                                                                                                                                                                              gmm-torchby ldeecke

                                                                                                                                                                                                                                                                                                                                                                                              Python doticonstar image 185 doticonVersion:Currentdoticon
                                                                                                                                                                                                                                                                                                                                                                                              License: Permissive (MIT)

                                                                                                                                                                                                                                                                                                                                                                                              Gaussian mixture models in PyTorch.

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                                                                                                                                                                                                                                                                                                                                                                                                        gmm-torchby ldeecke

                                                                                                                                                                                                                                                                                                                                                                                                        Python doticon star image 185 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                                                                                                                                                                                                                                                                                                                                        Gaussian mixture models in PyTorch.
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