Gradient Based Fingerprint Orientation Field Estimation
نویسنده
چکیده
Accurate estimation of ridge orientation is a critical step in image preprocessing methods used in automatic fingerprint identification systems (AFIS). Fingerprint orientation plays important roles in fingerprint enhancement, classification and recognition. The most popular is gradient-based method. This paper reviews the algorithm parameters, determining the compromise between accuracy in high-curvature areas and robustness against noise.
منابع مشابه
Shoba Dyre and C P Sumathi: Reliable Orientation Field Estimation of Fingerprint Based on Adaptive Neighborhood Analysis
Fingerprint Orientation estimation is an important step in feature extraction and classification. However, a reliable extraction of fingerprint orientation data is still a challenge for poor quality images. In this paper, a gradient based estimation of orientation field based on the analysis of orientation consistency in the neighborhood for regularizing the orientation field is proposed. Exper...
متن کاملPerformance Improvement in Gradient based Algorithm for the Estimation of Fingerprint Orientation Fields
Accuracy of fingerprint recognition system is reliable for correct measurement of fingerprint features. Orientation estimation of fingerprint ridges is playing a vital role in image enhancement, segmentation, classification and recognition. The accurate estimation of ridge orientation improves the performance of minutiae extraction and matching algorithm. The noisy fingerprint does not contain ...
متن کاملEnhanced gradient-based algorithm for the estimation of fingerprint orientation fields
An accurate estimation of fingerprint orientation fields is an essential step in the overall fingerprint recognition process. Conventional gradient-based approaches are popular but very sensitive to noise. In this paper, we propose a novel implementation to improve the performance of gradient-based methods. The enhanced algorithm chooses the best orientation estimate from four overlapping neigh...
متن کاملFingerprint Orientation Field Interpolation Based on the Constrained Delaunay Triangulation
A direction map or an orientation field is widely used in automatic fingerprint verification and recognition systems. In most existing methods, the block-wise orientation field is computed from the squared gradients. Since a fingerprint image can contain areas that may be smeared or scarcely distributed, faulty orientations can be produced during the process of orientation field estimation. In ...
متن کاملA Reliable Fingerprint Orientation Estimation Algorithm
Correctly estimating fingerprint ridge orientation is an important task in fingerprint image processing. A successful orientation estimation algorithm can drastically improve the performance of tasks such as fingerprint enhancement, classification, and singular points extraction. Gradient-based orientation estimation algorithms are widely adopted in academic literature, but they cannot guarante...
متن کامل