Face recognition concept in Computer Vision - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is face recognition in simple terms?

Face recognition is a technology that can find and identify people by looking at their faces, just like how you recognize your friends by their faces.

beginner

What are the two main steps in face recognition?

The two main steps are: 1) Detecting where the face is in a picture, and 2) Identifying who the face belongs to by comparing it to known faces.

intermediate

Why do face recognition systems use 'face embeddings'?

Face embeddings are like special codes that represent a face as numbers. They help the system compare faces quickly and accurately by looking at these codes instead of the whole picture.

intermediate

What is a common challenge in face recognition systems?

A common challenge is recognizing faces when lighting changes, faces are turned, or people wear glasses or hats. The system must still identify the person correctly despite these changes.

beginner

How does training data affect face recognition accuracy?

The system learns from many face pictures during training. More diverse and clear training data helps the system recognize faces better in real life.

What is the first step in a face recognition system?

A Detecting the face in the image

B Comparing face embeddings

C Training the model

D Matching the face to a name

The system first finds where the face is in the image before trying to identify it.

What do face embeddings represent?

A A picture of the face

B A unique number code for the face

C The person's name

D The lighting conditions

Face embeddings are number codes that represent the face's features for easy comparison.

Which factor can make face recognition harder?

A High-quality training data

B Clear face pictures

C Good lighting

D Wearing glasses or hats

Accessories like glasses or hats can change how the face looks and make recognition harder.

Why is diverse training data important?

A It makes the system slower

B It reduces the number of faces recognized

C It helps the system recognize many different faces

D It only helps with one person's face

Diverse data teaches the system to recognize faces of different people in many conditions.

What does face recognition technology try to do?

A Find and identify people by their faces

B Change the face in the picture

C Remove faces from images

D Create new faces

Face recognition finds faces and matches them to known people.

Explain the main steps involved in face recognition and why each step is important.

Think about how you first find a face in a photo and then figure out who it is.

Describe challenges that face recognition systems face and how training data helps overcome them.

Consider what makes recognizing a face hard and how learning from many examples helps.