三维图像虚拟视点生成优化研究仿真  

Research and Simulation of 3D image virtual viewpoint generation optimization

作　　者：张晓媛 于洋[2] 王新蕊[3] ZHANG Xiao-yuan;YU Yang;WANG Xin-rui(Department of Computer Science,Nankai University Binhai CollegeTianjin 300270hina;Department of intelligence and computing,Tianjin University,Tianjin 300350,China;Century College of Beijing University of Posts and Telecommunications,Beijing 100000,China)

机构地区：[1]南开大学滨海学院计算机科学系,天津300270 [2]天津大学智能与计算学部,天津300350 [3]北京邮电大学世纪学院,北京100000

出　　处：《计算机仿真》2022年第3期205-209,共5页Computer Simulation

摘　　要：为完整获取立体场景中所有视点信息,提出基于几何模型的立体图像虚拟视点生成方法。结合空间距离与像素差值两个影响因素,建立双边滤波器的滤波函数,定义权重系数,调节邻近度因子与亮度相似性因子的衰减性,得到滤波后的像素值;采集不同视角下二维图像,确定三维空间与二维图像间的几何映射关系,经过计算横向与纵向曲率、物体横向分割等过程构建立体图像几何模型;在该模型中,采用Levenberg-Marquardt迭代优化算法获取视图特征点,得出参考图像和目标图像的坐标关系,设定合理的误差函数,经过多次迭代,当满足误差允许值时,输出所有虚拟视点。仿真实验证明,该方法生成的虚拟视点较为全面,且能够提高重构后的图像质量。A method of virtual viewpoint generation of stereo image based on the geometric model is reported for improving the integrity of all viewpoint information in the stereo scene.The spatial distance and pixel difference were used to establish the filtering function of the bilateral filter,and the weight coefficient was also defined.The attenuation of the proximity factor and the brightness similarity factor was adjusted to obtain the filtered pixel value.Two-dimensional images from different perspectives were collected to determine the geometric mapping relationship between three-dimensional space and two-dimensional images.The horizontal and vertical curvatures and the horizontal segmentation of the object were calculated to build the geometric model of the stereo image.In this model,according to the Levenberg-Marquardt iterative optimization algorithm,the view feature points were obtained,and the coordinate relationship between the reference image and the target image was also obtained.After the reasonable error function was determined,multiple iterations were implemented.Eventually,all virtual viewpoints were output(meeting the allowable error value).The simulation results show that this method has a comprehensive virtual viewpoint and improved image quality.

关 键 词：几何模型 立体图像 虚拟视点 误差函数 双边滤波器 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]