指纹识别系统软件设计

ue to their uniqueness and persistence, fingerprint is used as the main basis of personal identification. Due to their uniqueness and persistence, fingerprints are used as main basis of personal identity. Automated fingerprint identification system(AFIS),a technology of fingerprint identification using computer, is of convenience high fields efficiency, security and reliability. It has been applied in many field such as financial security, data encryption, and electronically business.At present, the widely used minutiae-based algorithm performs well on recognition while the is highly efficient but preprocessing is time-consuming. On the other hand, the traditional structure-based algorithm is highly efficient but performs poorly on rotated pictures. For the shortcomings above, this paper studies and designs the recognitional algorithm based on Gabor filtering. The algorithm first calculates the positioning pattern to complete the reference point and divides the region of interest extracted to reference point as the center point into three concentric rings. Each concentric ring has been divided into 12 sectors, then the features of original and rotated image are extracted from Gabor filter through the 8 directions. Finally it utilizes Euclidean distance between fingerprint identification being calculated and template of fingerprint library to achieve the matching.