OFFLINE SIGNATURE RECOGNITION AND VERIFICATION USING SVM

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The signature of a person is an important biometric attribute of a human being that can be used to authenticate human identity. However human signatures can be handled as an image and recognized using computer vision and neural network techniques. With modern computers, there is a need to develop fast algorithms for signature recognition. There are various approaches to signature recognition with a lot of scope of research. In this project, off-line signature recognition & verification using SVM is proposed, where the signature is captured and presented to the user in an image format. Signatures are verified based on parameters extracted from the signature using various image processing techniques. The Off-line Signature Recognition and Verification is implemented using Matlab.

Steps for offline signature verification and identification:
1) Data acquisition and pre-processing

2) To extract features,
i. Apply Hu’s moment on original signature (will get 7 features)
ii. 1D radon transformation is applied to the signature image. The 2D radon function has been performed in 0, 45,90,135 directions (will get 35 features)
iii. After getting 1D radon images again apply Hu’s moment in this direction
iv. Segment original signature in 4 zones vertically (Normalized the signature in 32*128 size so that after zoning size of one zone is 32*64)
v. On each zone apply Gabor wavelet in 0,30,60,90,120, -30 directions
vi. Compute Energy and Standard Deviation (STD) separately on each sub-band (will get 48 features)
vii. On each zone after getting Gabor wavelet images again apply Hu’s moment

3) For identification use nearest neighbor classifier

4) For verification use Support Vector Machine (SVM) as a classifier

Reference Paper-1: Offline Signature Recognition & Verification using Neural Network
Author’s Name: O.C Abikoye, M.A Mabayoje, and R. Ajibade
Source: International Journal of Computer Applications
Year:2011

Reference Paper-2: Offline Handwritten Signature Identification and Verification Using Multi-Resolution Gabor Wavelet
Author’s Name: Muhammad Reza Pourshahabi, Mohamad-Hoseyn Sigari, and Hamid Reza Pourreza
Source: CiiT International Journal of Biometrics and Bioinformatics
Year:2011

Reference Paper-3: Off-Line Handwritten Signature Identification Using Rotated Complex Wavelet Filters
Author’s Name: M.S. Shirdhonkar and Manesh Kokare
Source: IJCSI International Journal of Computer Science
Year:2011

Reference Paper-4: Off-line Signature Verification based on Hu’s Moment Invariants and Zone Features using Support Vector Machine
Author’s Name: Mandeep Kaur Randhawa, A.K. Sharma, and R.K Sharma
Source: International Journal of Latest Trends in Engineering and Technology (IJLTET)
Year:2012

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