Real-time three-dimensional fingerprint acquisition via a new photometric stereo means
Real-time three-dimensional fingerprint acquisition via a new photometric stereo means
复制标题
通过新型光度立体方式实时获取三维指纹
DOI：
10.1117/1.oe.52.10.103103
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发表时间：
2013
影响因子：
1.3
通讯作者：
Chung Ronald
中科院分区：
文献类型：
--
作者：
Xie Wuyuan;Song Zhan;Chung Ronald
摘要。提出了一种三维指纹实时采集方法。该系统只配置了一个摄像头和一些白色发光二极管灯。基于光度立体原理进行重建。在该算法中，提出了一种双层Hanrahan-Krueger模型来代替传统的Lambert模型来表示手指表面反射率。通过提出的光照方向定标和非均匀光照校正方法，可以通过求解非线性优化问题来准确估计图像各点的表面法线。最后，采用线性法向变换对三维模型进行增强。用真实的手印和指纹进行了实验，并与传统方法进行了对比，验证了该方法的可行性和重建精度的提高。
Abstract. A real-time means for three-dimensional (3-D) fingerprint acquisition is presented. The system is configured with only one camera and some white light-emitting diode lamps. The reconstruction is performed based on the principle of photometric stereo. In the algorithm, a two-layer Hanrahan–Krueger model is proposed to represent the finger surface reflectance property instead of the traditional Lambert model. By the proposed lighting direction calibration and the nonuniform lighting correction methods, surface normal at each image point can be accurately estimated by solving a nonlinear optimization problem. Finally, a linear normal transformation is implemented for the enhancement of 3-D models. The experiments are implemented with real finger and palm prints, and the results are also compared with traditional means to show its feasibility and improvement in the reconstruction accuracy.