How do you implement Viola Jones?

Viola-Jones

1. Initialize the weights.
2. Normalize the weights.
3. Select the best weak classifier (based on the weighted error)
4. Update the weights based on the chosen classifiers error.
5. Repeat steps 2–4 T times where T is the desired number of weak classifiers.

What is sliding window detection?

Sliding windows play an integral role in object classification, as they allow us to localize exactly “where” in an image an object resides. Utilizing both a sliding window and an image pyramid we are able to detect objects in images at various scales and locations.

Is Viola Jones still used?

Therefore, while CNNs are faster and much more reliable in terms of accuracy, the Viola-Jones algorithm is still widely used today. Two modern products using the Viola-Jones algorithm are various models of point-and-shoot digital cameras and the social media app Snapchat (Q, 2017).

What are the main phases of the training classifiers using the Viola Jones face detector?

After learning about the major concepts used in the Viola-Jones Object Detection Framework, you are now ready to learn about how those concepts work together. The framework consists of two phases: Training and Testing/Application. Let’s look at each of them one by one.

What is integral image in Viola Jones?

An Integral Image is an intermediate representation of an image where the value for location (x, y) on the integral image equals the sum of the pixels above and to the left (inclusive) of the (x, y) location on the original image (Viola & Jones, 2001).

Is Viola Jones a deep learning algorithm?

It is concerned with detecting instances of an object such as human faces, buildings, trees, cars, etc. Although there are quite advanced face detection algorithms, especially with the introduction of deep learning, the introduction of viola jones algorithm in 2001 was a breakthrough in this field.

What can I do with face detection?

We’ve compiled a list of 21 ways that face recognition is currently being used to make the world safer, smarter and more convenient.

1. Prevent Retail Crime.
2. Unlock Phones.
3. Smarter Advertising.
4. Find Missing Persons.
5. Help the Blind.
6. Protect Law Enforcement.
7. Aid Forensic Investigations.
8. Identify People on Social Media Platforms.