Fingerprint Image Preprocessing and Feature Extraction Algorithms
Based on intrinsic fingerprint patterns, we propose a comprehensive fingerprint image preprocessing and feature extraction algorithm suite. Enhancements include improved ridge frequency calculation algorithms, optimized binary image hole noise removal, and a novel method for filtering pseudo-feature points. Testing conducted on hundreds of fingerprint images of varying quality demonstrates significant effectiveness. Key implementations involve frequency domain analysis for ridge detection and morphological operations for noise reduction. Keywords: fingerprint; preprocessing; feature extraction; algorithm optimization; image quality testing.