基于多帧水下距离选通图像的三维重构方法  

3-Dimersional Reconstruction Based on Underwater Range Gated Images

作　　者：李海兰[1] 王霞[1] 金伟其[1] 白廷柱[1] 黄有为[1] 丁琨[1] 

机构地区：[1]北京理工大学光电成像技术与系统教育部重点实验室,北京100081

出　　处：《光学学报》2010年第12期3464-3470,共7页Acta Optica Sinica

基　　金：国家863计划(2006AA09Z207)资助课题

摘　　要：为了突破水下距离选通系统成像的景深局限,综合借鉴激光雷达成像理论与图像重构过程中的优点,结合实验室水下激光距离选通成像系统的实际情况,具体分析了通过水下选通序列图像获取距离信息的过程。针对不同水质产生的不同水下选通图像特点采用目标与背景相减、相邻图像按周期加微小时间偏移量取极值然后层层递进重构以及分割重构等算法进行处理,并用不同距离的选通序列场景"切片"对该算法进行了实验验证,最终重构成一幅包含8.2～13.2m,共计5m距离范围的所有"切片"目标的图像。为进一步说明重构图像中所包含的距离信息,用三幅图像合成了一幅含有10.7～13.2m距离信息的伪彩色图像。In order to conquer the depth of field limitation in underwater range-gated imaging,the advantages of laser radar imaging theory and images reconstruction are taken,considering the reality of our laboratory,range information acquisition process of underwater range gated serial images is analyzed in detail.In view of the characteristics of range gated images obtained in different quality water,subtracting background image from object image,choosing maximum layer progressive reconstruction among adjacent images according to period plus tiny time offset and reconstruction after segmentation are used to images.Serial scene ＂slices＂ in different range is attained to testify the proposed algorithm.An image comprising objects in all ＂slices＂ from 8.2 to 13.2 m is reconstructed.In order to explain the range information in the reconstructed image,a pseudo color image is reconstructed by three adjacent images containing range information from 10.7 to 13.2 m.

关 键 词：成像系统 水下成像 距离选通 重构 三维显示 

分 类 号：TN29[电子电信—物理电子学]