基于液晶空间光调制器的空间滤波实验

Spatial Filtering Experiment Based on Liquid Crystal Light Modulator

空间滤波实验可以实现对输入物体的频谱分析及图像的边缘增强、噪声消除等各种图像处理。液晶空间光调制器可以作为衍射波面变换器件来使用。在空间滤波实验系统的滤波面上放置了液晶空间光调制器,并用CCD数码相机进行输出图像的观察和记录,分别给出了低通滤波、高通滤波、方向滤波等的仿真实验结果。该实验实现了输入数字物体的实时改变,并能够实时观察采用不同空间滤波器对输出像的影响。

The spatial filtering experiment can actualize various kinds of image processing,such as frequency spectrum analysis of input object,edge enhancement and noise reduction of image.Liquid crystal spatial light modulator can be used as transformation device of diffraction wave front.In the spatial filtering experiment,the liquid crystal spatial light modulator was used on the filter plane,and CCD digital camera which can observe and record output image was used.The simulated results of digital object that were filtered by low pass filter,high pass filter and direction filter are given.The experiment can not only timely change the input digital object,but also timely observe the influences of different filters on output image.