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Face Recognition Using Eigenfaces

Face Recognition Using Eigenfaces. Obama and Biden, McCain and Palin. Justin Li. What’s Face Recognition Good For?. Smart Artificial Systems. Security Systems. New Human-Machine Interface Methods. A Survey of Methods. Eigenfaces. Facial Measurements Mapping. 3D Morphable Model.

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Face Recognition Using Eigenfaces

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  1. Face Recognition Using Eigenfaces Obama and Biden, McCain and Palin Justin Li

  2. What’s Face Recognition Good For? Smart Artificial Systems Security Systems New Human-Machine Interface Methods

  3. A Survey of Methods Eigenfaces Facial Measurements Mapping 3D Morphable Model Facial Feature Mapping

  4. Lawrence Sirovich Alex Pentland Brief History of Eigenfaces Matthew Turk Michael Kirby

  5. The Eigenface Approach (1) • Name comes from the use of eigenvectors to identify faces. • Principal Component Analysis • Takes the mean of the pictures from a grayscale training set. • Subtracts the calculated mean from each picture. • Forms a covariance matrix. • Finds the eigenvectors for the covariance vectors. • PCA gives the resultant eigenvectors/eigenfaces.

  6. The Eigenface Approach (2) • Weighs test images with the eigenvectors to find correlation. • A computationally fast method for face recognition. • Note that the covariance matrix will be exceedingly large. • A simplification is introduced. • Instead, make a simplified matrix with dimensions the number of pictures in the training set. • Scale the eigenvectors using the training pictures. • This allows for a computationally feasible way to calculate the eigenfaces.

  7. Flaws and Limitations • Face orientation • Lighting conditions • Requires specific alignment and normalization.

  8. Implementation and Improvements • Standard implementation as given in the paper by Pentland and Turk. • Improvements possible with better segmentation and cropping, perhaps ignoring more portions of the hair. • Combining method with results from other facial metrics or from other methods entirely.

  9. Demonstration andQuestions?

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