## Who were sirovich and Kirby?

But let’s look at one of the first face recognition algorithms developed by mathematicians Larry Sirovich and Michael Kirby at Brown University in the 1980s. They started by computing an average face from a set of pictures.

## What do eigenfaces tell us?

Eigenfaces is a method that is useful for face recognition and detection by determining the variance of faces in a collection of face images and use those variances to encode and decode a face in a machine learning way without the full information reducing computation and space complexity.

**What do eigenfaces look like?**

Generation. A set of eigenfaces can be generated by performing a mathematical process called principal component analysis (PCA) on a large set of images depicting different human faces. Other eigenfaces have patterns that are less simple to identify, and the image of the eigenface may look very little like a face.

**How the eigenfaces are used in human face detection?**

The strategy of the Eigenfaces method consists of extracting the characteristic features on the face and representing the face in question as a linear combination of the so called ‘eigenfaces’ obtained from the feature extraction process. The principal components of the faces in the training set are calculated.

### What is Fisherfaces algorithm?

Fisherfaces algorithm extracts principle components that separates one individual from another. So , now an individual’s features can’t dominate another person’s features. LDA is used to find a linear combination of features that separates two or more classes or objects.

### Why PCA is used in face recognition?

PCA is a statistical approach used for reducing the number of variables in face recognition. In PCA, every image in the training set is represented as a linear combination of weighted eigenvectors called eigenfaces. A number of experiments were done to evaluate the performance of the face recognition system.

**What is Fisherface algorithm?**

**How do you use PCA for face recognition?**

- ISSN: 2278 – 1323.
- pattern and incorporate into known faces.
- Fig-1:Conversion of M × N image into MN ×1 vector.
- Step 2: Prepare the data set.
- Step 3: compute the average face vector.
- Step 4: Subtract the average face vector.
- Step 5: Calculate the covariance matrix.
- Step 6: Calculate the eigenvectors and eigenvalues of the.

## What is LBPH algorithm?

LBPH (Local Binary Pattern Histogram) is a Face-Recognition algorithm it is used to recognize the face of a person. It is known for its performance and how it is able to recognize the face of a person from both front face and side face.

## What is Eigenfaces and Fisherfaces?

Fisherface is similar to Eigenface but with improvement in better classification of different classes image. With FLD, we could classify the training set to deal with different people and different facial expression. We could have better accuracy in facial expression than Eigen face approach.

**Which model is best for face recognition?**

For general computer vision problems, OpenCV’s Caffe model of the DNN module is the best. It works well with occlusion, quick head movements, and can identify side faces as well. Moreover, it also gave the quickest fps among all.