航海气象传真图的降噪处理  

Noise Reduction of Weather Facsimile Chart

作　　者：刘超[1] 刘婧[1] 

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026

出　　处：《中国航海》2013年第2期105-109,共5页Navigation of China

摘　　要：气象传真图是船舶驾驶员预知航行区域的气象信息及海况的主要途径。受电磁波和收发装置的影响,气象传真图在传输、接收的过程中会产生高斯噪声和椒盐噪声,严重时会导致接收到的气象传真图模糊不清和失真,这会影响船舶驾驶员的分析和决策。为此,基于偏微分方程(PDE)建立数学模型,对含有噪声的气象传真图进行降噪处理,取得了明显的效果,这为提高气象传真图的质量提供了一种可行方法。同时,这种方法也可运用于船舶其它的电子图像设备(如电子海图,雷达,AIS),有效降噪、提高图像质量。Weather facsimile chart is the main media carrying meteorological information at sea for mariners.Through the electromagnetic wave and receiving devices,facsimile weather charts suffer from Gaussian noises and salt and pepper noises introduced during transmission and receiving process,making the meteorological facsimile charts blurred,sometimes seriously.A mathematical model is set up to process noisy meteorological facsimile charts,in form of partial differential equation（PDE）.A remarkable noise reduction is achieved with the model.The method is not only feasible for improving the quality of meteorological facsimile chart but also suitable for processing other marine electronic image medias,such as electronic charts,radar,AIS,for noise reduction.

关 键 词：水路运输 气象传真图 图像噪声 偏微分方程 降噪 

分 类 号：U666.135[交通运输工程—船舶及航道工程]