摘要
光学和数字全息需要解决的基本问题是在图像重构过程中出现的散斑噪声,因为散斑降低了信噪比(SNR)。目前很多方法都可以减小散斑噪声,以提高数字全息信噪比。现利用小波滤波的方法来提高数字全息重构过程中的信噪比。提供了实验结果,实验结果证明该方法是可行的。
The basic problem in optical and digital holography is the presence of speckle noise in the reconstruction process, which reduces the signal-to-noise ratio （SNR）. Lots of methods are found to reduce noise for the sake of improving signal-to-noise. In this paper, we present wavelet filtering to improve SNR in the reconstructed images from digital holograms. Experimental results are presented, and the method is proved correct.
出处
《光学仪器》
2009年第2期26-30,共5页
Optical Instruments
关键词
数字全息
小波变换
散斑噪声
信噪比
digital holography
wavelet transform
speckle noise, signal-to-noise ratio （SNR）
