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计算机工程 ›› 2021, Vol. 47 ›› Issue (4): 204-210. doi: 10.19678/j.issn.1000-3428.0058057

• 图形图像处理 • 上一篇    下一篇

基于分层图像融合的虚拟视点绘制算法

蔡李美, 李新福, 田学东   

  1. 河北大学 网络空间安全与计算机学院, 河北 保定 071000
  • 收稿日期:2020-04-14 修回日期:2020-05-15 发布日期:2020-05-26
  • 作者简介:蔡李美(1996-),女,硕士研究生,主研方向为智能图文信息处理;李新福、田学东,教授、博士。
  • 基金资助:
    河北省教育厅高等学校科学技术研究重点项目(ZD2017209)。

Virtual Viewpoint Rendering Algorithm Based on Hierarchical Image Fusion

CAI Limei, LI Xinfu, TIAN Xuedong   

  1. School of Cyber Security and Computer, Hebei University, Baoding, Hebei 071000, China
  • Received:2020-04-14 Revised:2020-05-15 Published:2020-05-26

摘要: 针对虚拟视点绘制过程中出现的重叠和空洞问题,提出一种新的虚拟视点绘制算法。通过形态学操作对三维图像变换后出现的空洞进行膨胀来消除伪影瑕疵,根据深度信息对左、右虚拟视点图像进行前景和背景分割,利用线性加权法对分割后的前景图像和背景图像进行分层融合解决像素重叠问题,对分层融合后的背景图像进行空洞填充并与前景图像融合得到虚拟视点图像。实验结果表明,与经典的Criminisi算法相比,该算法PSNR值提高了1.75 dB,具有较高的绘图质量。

关键词: 虚拟视点, 深度信息, 前景和背景分割, 分层融合, 三维图像变换

Abstract: To address the overlaps and holes in virtual viewpoint rendering,this paper proposes a new virtual viewpoint rendering algorithm based on hierarchical image fusion.The algorithm performs morphological operation on the holes generated by 3D image transformation to expand them,thus eliminating artifact defects.Then according to the depth information,the foreground and background of the left and right virtual viewpoint images are segmented.The linear weighting method is used to implement hierarchical fusion for segmented foreground and background images to solve pixel overlap.Holes filled,the background image is fused with the foreground image to obtain the virtual viewpoint image.Experimental results show that the PSNR of the proposed algorithm is 1.75 dB higher than that of the Criminisi algorithm.

Key words: virtual viewpoint, depth information, foreground and background segmentation, hierarchical fusion, three-dimensional image transformation

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