摘要
立体图像的视觉变焦优化是近年来图像处理和计算机视觉领域热门的基础研究问题。3D图像的变焦视觉增强技术越来越受到关注。为此,本文从相机变焦拍摄的模型出发,提出一种基于网格形变的立体变焦视觉优化方法,力求提高3D立体视觉的体验。首先利用数字变焦方法模拟相机模型对目标区域进行适当的视觉放大,然后根据相机变焦距离建立起参考图像与目标图像之间的映射关系,并提取前景目标对象,接着使用改进型深度恰可察觉深度模型来引导目标对象的自适应深度调整。最后结合本文所设计的七个网格优化能量项,对图像网格进行优化,以提高该目标对象的视觉感,并确保整幅立体图像的良好视觉体验效果。与现有的数字变焦方法相比,所提出的方法在图像目标对象的尺寸控制方面和目标对象的深度调整方面都具有更好的效果。
Stereoscopic image zoom optimization is a popular basic research problem in the field of image processing and computer vision in recent years.The zoom visual enhancement technology of 3 D images has attracted more and more attention.To this end,this paper proposes a method of stereoscopic zoom vision optimization based on grid deformation from the model of camera zoom shooting,and strives to improve the experience of 3 D stereoscopic vision.Firstly,use the digital zoom method to simulate the camera model to properly zoom in on the target area,and then establish the mapping relationship between the reference image and the target image according to the camera zoom distance.Secondly,extract the foreground target object and use the modified just noticeable depth difference(JNDiD)model to guide the adaptive depth adjustment of the target object.Finally,combined with the seven grid-optimized energy terms designed in this paper,the image grid is optimized to improve the visual perception of the target object and ensure a good visual experience for the entire stereoscopic image.Compared with the existing digital zoom method,the proposed method has better effects on the size control of the image target object and the depth adjustment of the target object.
作者
周莘
柴雄力
邵枫
Zhou Shen;Chai Xiongli;Shao Feng(College of Information Science and Engineering,Ningbo University,Ningbo,Zhejiang 315211,China)
出处
《光电工程》
CAS
CSCD
北大核心
2021年第4期12-26,共15页
Opto-Electronic Engineering
基金
国家自然科学基金资助项目(61622109)
宁波市自然科学基金项目(2017A610112)。
关键词
立体图像
相机变焦
改进型深度恰可察觉深度模型
网格优化能量项
stereoscopic image
camera focal length
modified just noticeable depth difference model
grid-optimized energy term
