摘要
提出一种在现行方向图的基础上改进的圆形方向图,这种圆形方向图过渡平滑、自然、具有很好的连续性、抗噪性,同时对低质量指纹图像具有良好的鲁棒性,能更精确地反应指纹脊线的结构特征,而且计算量比现行方向图减少15%,试验证明了方法的有效性。
A new fingerprint drectional image--roundness directional image is proposed, which transits smoothly and exhibits not only good continuity and excellent robustness to the noises, but also filter the noises in the picture of low quality, represent the basic structural features of the fingerprint more precisely, and reduce the workload by fifteen percent.
出处
《微计算机信息》
2009年第13期261-262,270,共3页
Control & Automation
关键词
点方向图
块方向图
圆形方向图
point directional image
block directional image
roundness directional image
