摘要：通过对水滴运动模糊图像的物理本质进行分析，提出了一种基于 频域的水滴运动方向识别方法。 通过对运动模糊图像做二维傅立叶变 换得到其频谱幅值图， 然后利用频谱幅值图中高亮条纹的方向与运动 方向相垂直的特性完成对水滴运动方向的识别， 高亮条纹的方向采用 RADON 变换方法加以检测。 仿真实验结果表明，该方法可以准确地识 别水滴运动方向。 

关键词：水滴、运动方向；频域分析

Abstract：By analyzing the physical nature of water droplets motion blurred image，a new method based on frequency-domain analysis for iden tification of water droplet movement direction was put forward. The spec trum image of motion-blur image was firstly obtained by 2D Fourier trans formation. Then，utilizing the fact that the highlighted strip was perpendic ular to the motion-blur direction，the water droplet movement direction was estimated. The direction of highlighted strip was identified by RADON transformation. The simulated experimental results showed that the novel method could accurately estimate the water droplet movement direction. 

Keywords：water droplet； movement direction； frequency-domain analy sis