Processing data from images is a task that requires a high level of machine learning, especially for the faces. Currently there are several libraries for face recognition in Python, where the learning process is done by the machine, through the reading of many images with some face, and their analysis in each one, to build an information network that allows us to identify faces.
In this publication we show users some great tools through the Face Recognition library, to facilitate the implementation of facial recognition in your development, easily implementable in different programming languages, to facilitate the task according to your skill and ease of use. Moreover, this library is open source, with MIT licensing.
Introduction to Face Recognition
Face Recognition is a library that allows facial recognition in Python. It is easy to use and uses C++ dlib library for face recognition. The algorithm makes an in-depth learning with 99.38% accurate according to their site. The library can be cloned directly from Github or implemented via Git in your project.
git clone https://github.com/ageitgey/face_recognition.git
Examples of facial recognition with Face Recognition
Recognize faces in images
To find all faces in an image, it is enough to use the following three lines of code included the face_recognition library:
import face_recognition image = face_recognition.load_image_file("my_image.jpg") findFace = face_recognition.face_locations(image)
To show the result, we have the following image whose file name is my_image.jpg
If we run the previous code, the existing faces in the image are extracted:
Add contour to a face
It is possible to add an outline around the face, eyes, nose, mouth and chin with Face recognition in Python library. The code is:
import face_recognition image = face_recognition.load_image_file("my_image.jpg") marked_face = face_recognition.face_landmarks(image)
Identify faces in an image
To identify a person’s face in an image, a machine learning (or training) process is required, reading several images and storing their biometric content and then comparing it with various samples. Through comparisons, the machine defines the person shown in the image. The code used for facial identification or recognition in an image is as follows:
import face_recognition knownImage = face_recognition.load_image_file("kennedy.jpg") UnknownImage = face_recognition.load_image_file("otherImage.jpg") codedKennedy = face_recognition.face_encodings(knownImage) encodedUnknown = face_recognition.face_encodings(UnknownImage) result = face_recognition.compare_faces([encodedKennedy], encodedUnknown)
Where if we use the following image kennedy.jpg, the image will recognize us as John F. Kennedy.
Other examples of Face Recognition