数字散斑相关方法实现鼠标定位原理

在激光鼠标工作原理的基础上,利用数字散斑相关方法对激光鼠标的定位原理进行了研究。设计实验得到散斑场并用数码相机拍摄。用图像采集卡采集CCD扫描数散斑图像得到的图像,将图像数字化,分析数据得到了图像最优采样的像素单元和图像位移两个参量。基于两个参量,实验采集散斑图像在一定的轨迹运动下的散斑场,用Matlab软件模拟,并比较分析了实验和模拟结果。结果表明,用数字散斑相关方法可以实现激光鼠标的定位功能,并且分辨力可达到1μm,远高于市场上激光鼠标30μm的分辨力。

Orientation of Mouse Using Digital Speckle Correlation Method

Based on the working principle of laser mouse, the digital speckle correlation method is used to realize orientation of laser mouse. The orientation principle is investigated. The experiment is designed to obtain the speckle pattern by a digital camera. The CCD is used to scan the moving spackle picture through the image acquisition board. Two parameters of optimum sampling, pixel and image displacement, are obtained by data analysis. The speckle picture is moved by a definite trace and shot by a digital camera, and the experiment is simulated by solfware Matlab. The displacement of speckle picture is processed by digital speckle correlation method. The simulated results are compared with the experimental results. The results prove the digital speckle correlation method can confirm allocation, and the obtained resolution is 1 μm, which is higher than the resolution 30 μm of the laser mouse in market.