基于相位重构的计算全息再现光场中噪声的消除方法

由于量化噪声、胶片中有大量微小颗粒等原因,用CGH再现的光场中往往有散斑噪声。为了消除散斑噪声,文章提出了一种新的处理思路和方法:不是刻意去获得低噪声的再现光场,而是用数字全息技术重构再现光场(包括散斑噪声)的振幅和相位,继而从再现光场中消除散斑噪声,得到高质量的再现光场。实验结果表明,即使在散斑噪声很大的情况下用该方法得到的光场依然是令人满意的。

A noise elimination method in the reconstructed light field of the CGH based on the phase reconstruction

Because of the quantification noise and a large number of pellets in film,there always has speckle noise in the reconstructed light field using the method of CGH.To eliminate the speckle noise,the paper proposed a new processing method:not to obtain the low noise reconstructed light field sedulously,but use the technology of digital holography to reconstruct the amplitude and the phase of the light field(including the speckle noise),then eliminate the speckle noise of the reconstructed light filed and we can get the high quality of reconstructed light filed.The experimental result indicated that it is still satisfying to obtain the light field with this method even if the speckle noise is very heavy.