The main reason of underwater image degradation is backscattering effect of water for light. Backscattering noise elimination is one of the main works of underwater image processing. The causes of generating backscattering noise are analyzed and it is divided into random part and DC part through establishing backscattering noise model of light transmission. Performing Laplacian operation for eliminating the underwater image of DC noise and using Wiener adaptive filter to remove noise again. This method proves that the method can remove the backscattering noise and enhance the image contrast.%为了有效解决逆变电源中存在的因单一复杂控制而带来的系统运行高风险性、控制精度低,反馈调节时间长,系统可扩展性差等缺点,设计实现了一种基于ARM7 Cortex-M3内核的单片机STM32FI03和TI C2000系列DSP芯片TMS320F2808的双核控制逆变电源控制电路.通过在一台6kVA工频双变换纯在线式单相小功率逆变电源上进行控制和负载实验.结果表明,该设计方案有效解决了逆变电源系统中因控制核单一而导致的高复杂度高风险性的缺点,具有控制器模块化,抗干扰能力强,反馈调节速度快,内部接口扩展功能丰富等特点.
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