Face Recognition Technology

Face Recognition System

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What is Biometrics? Why use Biometrics?

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Biometrics TechniquesBiometrics Techniques

Fingerprint Recognition

Face Recognition Iris Recognition Voice Recognition Hand Geometry

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Face RecognitionFace Recognition

What is Face Recognition System?

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Face Recognition system Face Recognition system composition composition

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Face recognition surveillance Face recognition surveillance systemsystem

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Face Recognition AlgorithmsFace Recognition Algorithms

Feature Analysis Eigenfaces or Prinicipal Component Analysis 3D face recognition methods

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Eigenface algorithmEigenface algorithm

Overview of the algorithm• What is eigenface ?• What is Training set?• Each Image is represented as NxN • Convert training set to eigenface• Calculate weight for each eigenface and store it in set W

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Classifying facesClassifying faces

Catch unknown imageCalculate weight for that Image and store it in WxCompare Wx with set of Images Check the result with the predefined threshold valueDecide whether unknown Image is face or not

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Flow chart of the algorithmFlow chart of the algorithm

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Calculating eigenface with Calculating eigenface with PCAPCA

Prepare data set I.e. create training set

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PCA PCA

Calculate average face from training set

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PCAPCA

Average face :

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PCA - ProcessPCA - Process

Calculate the covariance matrix

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PCAPCA

Calculate the eigenvector and eigenvalues of cavarianve matrx.Select the prinicipal component eigenvetors with highest eigen value is stored as eigenface.

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PCAPCA

Eigenfaces of the training set

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Technical difficulties with Technical difficulties with Eigenface Eigenface

Finding faces Uncontrolled backgroundSubject's non-cooperation

Subject not looking at camera.Subject wearing sunglasses.Sometimes affected by facial hair, expression etc.

Identifying facesUncontrolled environmental condition

camera angle, pose of the face

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Why choose Face Recognition Why choose Face Recognition over other biometrcs over other biometrcs technique technique

It doesn't require physical interactionIt allows passive Identification in one to many environmentIt doesn't require expert to interpret the comparisionFace recognition VS Iris resognition

Higly sensitive to body motion. will not work well if person has wear

contact lense.

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Why choose face recognition?Why choose face recognition?

Face Vs Voice recognitionA tap recording can fool voice recognitionIllness and stress can impede effectiveness

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Current and future uses of Current and future uses of Face recognition systemFace recognition system

The U.S. government's US-VISIT (United States Visitor and Immigrant Status Indicator Technology) uses this technology

ATM and check-cashing security

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Questions?