Christie S M, Kvasnik F
Appl Opt. 1996 Feb 10;35(5):817-25. doi: 10.1364/AO.35.000817.
The use of coherent optical processors for improving the quality of degraded underwater images is discussed, and a holographic filter suitable for the enhancement of contrast in underwater images is described. The filter is a modified matched spatial filter, and it performs a nonlinear local contrast enhancement. The theory of the operation of the coherent optical image processor with this new filter is presented and experimentally verified. The removal of the backscattered light from underwater images is demonstrated under laboratory conditions. The results show an improvement in the overall image contrast.
讨论了使用相干光学处理器来提高水下退化图像的质量，并描述了一种适用于增强水下图像对比度的全息滤波器。该滤波器是一种改进的匹配空间滤波器，它执行非线性局部对比度增强。提出并通过实验验证了使用这种新滤波器的相干光学图像处理器的工作原理。在实验室条件下演示了从水下图像中去除后向散射光的方法。结果表明整体图像对比度有所提高。
