关键词: 指纹图像增强, 小波图像融合, 迭代, 脊线连接, 指纹图像修补

Abstract: Suspect fingerprint images acquired from criminal scenes are often of low quality, or incomplete. The existing algorithms/methods found in literature are not suitable for enhancing these fingerprint images, because these algorithms/methods only perform enhancement once. In this paper, a new method for fingerprint image enhancement was proposed. The proposed method enhanced fingerprint image in Fourier domain and spatial domain by using iterative and wavelet fusion technique. Experimental results indicate that the proposed method significantly improves the performance of fingerprint enhancement — not only was the ridge definition enhanced, but also the ridge fracture was connected and the incompleteness was mended. Therefore, the proposed method is suitable for enhancing low quality fingerprint images.

Key words: fingerprint image enhancement, wavelet image fusion, iterative, ridge connection, fingerprint image mending