摘要： 提出一种适用于指纹图像增强的Gabor滤波器的硬件设计与实现方案。利用更精确的方向与频率信息配置滤波器改善指纹图像的增强效果。为解决由此带来的带宽问题，设计输入输出缓存器，最多可使带宽降低近10/11。整个设计采用SMIC 0.13 μm工艺综合后大小约为24万等效门，频率为250 MHz。在滤波器窗口大小为11×11时，引入流水线结构使吞吐率可以达到每秒200万像素以上。实验结果表明，该方案具有较好的实时性。

关键词: 指纹, 图像增强, Gabor滤波器, 输入输出缓存器, 流水线结构

Abstract: This paper proposes a design and implementation scheme of Gabor filter for fingerprint image enhancement. It employs accurate local orientation and frequency to achieve better enhancement effect. To address the subsequent problem of bandwidth increase, a specific Input/ Output(I/O) buffer is designed, which can almost cut off 10/11 bandwidth. At SMIC 0.13 μm technology, the equivalent gate count is 240 000, while the frequency is 250 MHz. Due to the introduction of pipeline, the design scheme can achieve a throughput more than 2 Mpixels/s, when convolution kernel size is 11×11. Experimental result shows that the scheme can well satisfy the requirements of the real-time applications.

Key words: fingerprint, image enhancement, Gabor filter, Input/Output(I/O) buffer, pipeline structure

中图分类号: 

• TP391