消除水下激光图像混合噪音的软形态滤波算法

除了采用距离选通等特殊机制来消除后向散射之外,水下激光成像系统作用距离的进一步提升依赖于对图像中噪音的有效抑制.在分析水下激光距离选通图像噪音特性的基础上,引入软形态学,设计了多方向结构元和极化软形态变换,组成开-闲级联滤波器.对于其中的重复度参量,以散斑指数和边缘能量为目标,采用离散差分算法优化.实验结果表明,该算法...

A Mixed Noise Reduction Algorithm for Underwater Laser Images Based on Soft-Morphological Filter

Besides the adoption of range-gated to eliminate the backscatter, another way to advance the performance of underwater laser imaging is denoising of the images. Soft-morphological is introduced based on the analysis of the characteristic of noise in the underwater laser range-gated images. The multidirectional structures and polarized soft transformation is designed to build a OC filter. Discrete ED arithmetric is used to search the best value of repletion degree aiming at the speckle index and edge energy. The experiments showed that the proposed arithmetric is robustious because of the ability to filter the noise and protect the edge at the same time. When compared to Lee filter and nonlinear weighted averaging multidirectional generalized morphological filter, the performance of the proposed arithmetric which is universal at a certain extent is better.