基于动态嵌套金字塔模型的超大海底图像显示  

Large Underwater Photo-mosaics Display Based on Dynamic Nested Pyramid Model

作　　者：刘男男 李晓明[1] LIU Nannan;LI Xiaoming(College of Computer Science and Technology,Taiyuan University of Science and Technology,Taiyuan 030024)

机构地区：[1]太原科技大学计算机科学与技术学院,太原030024

出　　处：《计算机与数字工程》2024年第10期3094-3099,共6页Computer & Digital Engineering

基　　金：辽宁省科技厅和机器人技术国家重点实验室联合基金项目(编号:2020-KF-22-14)资助。

摘　　要：在海底勘探中,拼接得到的海底全景图高达百亿级像素,由于软硬件限制及其个性化需求,超大海底图像的显示问题亟待解决。将瓦片金字塔模型用于超大海底图像的显示中,针对分辨率切换时图像过渡不连续、画面跳跃显著的问题,对该模型进行改进,提出了一种新的动态嵌套金字塔模型。以海底数据集为例,对模型改进前后的显示效果进行定性和定量分析,实验结果表明,改变相同的图幅大小时,改进后的模型层级差由原来的一级延缓为二级,瓦片数目的变化率和视野覆盖范围均降低为原来的0.5倍,视觉上图像过渡更连续,验证了该模型的有效性,为超大海底图像的显示工作提供了重要的理论依据。In deep seafloor exploration,it is common to stitch multiple images into a photo-mosaic which could reach tens of billions of pixels.The display problem of large underwater photo-mosaics needs to be solved urgently due to the limitations of soft-ware,hardware and their personalized requirements.When tile pyramid model is applied to display large underwater images,aim-ing at the problems of discontinuous image transition and significant picture jump during resolution switching,a new dynamic nest-ed pyramid model is proposed by improved the model.Taking the underwater data set as an example,the display effect of improved model and traditional model is analyzed qualitatively and quantitatively.The experimental results show that improved model level is delayed from 1 to 2,the change rate of tile number and visual field are reduced to original 0.5 times when the same size image is changed.Visually,the image transition is more continuous based on the new model,which verifies the effectiveness of the model and provides important theoretical basis for large underwater photo-mosaics display.

关 键 词：动态嵌套金字塔模型 超大海底图像 多分辨率显示 瓦片图 四叉树索引 

分 类 号：O141.4[理学—数学]