这种方法能进一步增强了指纹的脊线和谷线，使指纹文线变得清晰、连续、光滑，改善指纹图像的质量，提高了指纹识别的可靠性-This approach can further enhance the fingerprint ridge and valley lines, so that fingerprints text lines become clear, continuous, smooth, improve the quality of fingerprint images, improve t