基于锥光全息法的非接触式测量中的方向滤波方法研究  

Research on signal denoise in non-contact measurement based on conoscopic holography

作　　者：任淑艳[1] 张琢[1] 刘国栋[1] 浦昭邦[1] 

机构地区：[1]哈尔滨工业大学自动测试与控制系,黑龙江哈尔滨150001

出　　处：《光电子．激光》2008年第6期790-794,共5页Journal of Optoelectronics·Laser

摘　　要：针对锥光全息式非接触测量系统测得的具有良好的方向性特征的图像上存在大量散斑噪声的情况,对各种方向滤波方法进行了分析,提出了一种改进的平均曲率非线性扩散滤波方法。该方法利用图像平面的曲率进行扩散滤波,可以更有效地保持图像边缘,同时引入的线性变化因子大大加快了图像的滤波处理速度。实验证明,此算法能够很好地滤除噪声干扰,并满足锥光全息系统的测量实时性要求。To eliminate speckle noise no image with perfect character of orientationi from non-contact mneasurement based on conoscopic holography,an improved method of mean curve diffusion filter is proposed for analyzing different orientational filters,which filters noise according to curvature of the iamge plane. So it can preserve edge information effectively,and a linearly changing factor is introduced to make filter process faster. Experimental results show that this method can get better filter effect and satisfy real-time measurement of conoscopic holography system.

关 键 词：锥光全息 散斑 平均曲率扩散 滤波 

分 类 号：TN247[电子电信—物理电子学]