基于概要图的数字地形生成方法

Digital Terrain Generation Method Based on Sketch Map

针对地形生成算法在易用性、可控性、真实感、速度等方面难以平衡的问题,提出了一种基于概要图的地形生成方法.该方法使用生成对抗网络,在隐空间中对地形坡度、坡向等信息建模,使生成的地形符合用户手绘概要图约束.提出基于地形高度图的概要图提取算法,可从真实地形高度图中提取出类似用户手绘效果的概要图,快速构建数据集.提出多尺度地形细节填充算法,通过引入多尺度的概念,使地形纹理细节得到了动态补充,真实感美观度大幅提升.提出了基于用户反馈的地形满意度评价方法,并据此进行实验验证,结果表明该地形生成方法可以准确高效地生成符合用户预期的数字地形.

As the terrain generation algorithm has trouble balancing ease of use,controllability,realism,and speed,this study proposes a terrain generation method based on sketch maps.This method uses the generative adversarial network to model the terrain slope,slope aspect,and other information in the hidden space so that the generated terrain conforms to the constraints of the user’s hand-drawn sketch map.This study also proposes a sketch map extraction algorithm based on terrain height maps,and it can extract a sketch map to a hand-drawn effect from a real terrain height map and quickly build the data set.An algorithm for multi-scale terrain detail filling is proposed.Owing to the introduction of the multiscale concept,the terrain texture details are dynamically supplemented,and the realism and aesthetic properties are greatly improved.A terrain satisfaction evaluation method based on user feedback is proposed and verified by experiments.The results show that the proposed terrain generation method can accurately and efficiently generate digital terrain that meets users’expectations.