基于导航雷达海面回波图像去噪研究  

Research on X-band Radar Sea Surface Images Denoising

作　　者：宋占杰[1,2] 孙皓[1] 王鑫[2] 张锁平[2] 王兵振[2] 

机构地区：[1]天津大学电视与图像信息研究所,天津300072 [2]国家海洋技术中心,天津300112

出　　处：《海洋技术》2010年第1期82-86,共5页Ocean Technology

基　　金：国家自然科学基金资助项目(10926196);天津市自然科学基金资助项目(08JCYBJC09600)

摘　　要：根据海面X波段雷达回波图像数据的时空特点,提出了一种新的去噪方法。该方法利用线检测对雷达图像中的射线状噪声进行分离,然后针对这种特殊的噪声形式提出一种阈值分割的方法,最后在极坐标下针对噪声点进行插值修复。实验表明,与传统的均值滤波和中值滤波等方法相比,新方法无论在主观视觉还是信噪比方面,都有了一定改进,图像保留了更多的细节信息,具有较好的去噪效果。A method of denoising is presented according to the space-time characteristics of the X-band radar sea surface images. The noise in radial pattern can be separated by line detection. Considering the special pattern of the noise, a method of threshold segmentation has been put forward. Furthermore, interpolation in polar coordinates has been adopted on these noise points. The results show that this method achieves improvement on both subjective vision and SNR comparing with traditional methods mean filtering and median filtering. It also keeps better detail information and has a good denoising effect.

关 键 词：X波段雷达 射线状噪声 阈值分割 反距离加权法 

分 类 号：TN957.51[电子电信—信号与信息处理]