Signature Verification

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• Position Normalization:1000800600500400Initial Sample0-5002000-200-1000-400-600-1500-1500 -1000 -500 0 500 1000 1500 2000 2500-800-500 0 500 1000 1500 2000 2500 3000 3500 400015008001000600400Center of Mass50002000-200-500-400-600-1000-2000 -1500 -1000 -500 0 500 1000 1500 2000-800-2000 -1500 -1000 -500 0 500 1000 1500 2000 2500
Resample• In order to compare two signatures with respect to theirshape, they must be re-sampled to eliminate thedependencies on speed– Sample rate: 100 samples/second• Temporal features must be extracted beforehand sinceall local speed information is lost during this process
Page 5: • On-Line:Azimuth (0°-359°)Alti
Page 8: • Disadvantages:- High intra-clas
Page 11: • Acquisition devices:AlAzPYX0 10
Page 16 and 17: Resampling• Ensures that the sign
Page 18 and 19: Stroke Concatenation• A stroke is
Page 20 and 21: Critical Points• Re-sampling or s
Page 22 and 23: Preprocessing Steps• Fine re-samp
Page 24 and 25: Pattern Recognition Process
Page 26 and 27: Feature Extraction• Local feature
Page 28 and 29: Local Features• The 9x9 pixel nei
Page 30 and 31: Global Features
Page 32 and 33: String Matching• To compute this
Page 34 and 35: String Matching• Each point is re
Page 36 and 37: Dimension Reduction• PCA- Transfo
Page 38 and 39: Validation Set• PCA needs samples
Page 40 and 41: • M is the squared Mahalanobis di
Page 42 and 43: Score Fusion
Page 44 and 45: Weighted Sum Rule• Assign a test

Signature Verification

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