直线特征保持的立体图像缩放

A Straight-Line Preserved Resizing Method for Stereoscopic Images

近年来随着3D显示设备的普及,内容感知的立体图像缩放问题得到了国内外学者的关注.与2D图像缩放不同,立体图像缩放不仅需要保持并突显图像显著区域,还必须保持立体图像视差的一致性.文中提出了一种立体直线特征保持的立体图像缩放的方法,通过在基于网格变形的图像缩放的方法中引入立体直线特征保持和内容感知的随机匹配点等约束条件,在保持立体图像视差的一致性的同时,较好地保持立体图像中直线区域的直线特征.首先,基于立体图像视差图,定义立体图像Hot-target图,检测立体图像显著区域,并获取立体图像直线特征;其次,引入内容感知的随机匹配点作为视差一致性约束;最后,构建基于四边域网格的受限能量模型,优化实现立体图像缩放.文中提供了若干实验数据说明该方法是有效的.

With the popularity of 3D display equipments,content-aware stereoscopic image resizing problems have attracted great attentions in recent years.Different from 2D image resizing,resizing a pair of stereoscopic images is expected to preserve the disparity consistency of input images,in addition to visual salient contents.A 3D Straight-Line preserved resizing method for stereoscopic images is proposed,which introduces straight lines preservation and applies content-aware random matching to the stereoscopic constraints.Specifically,stereo Hot-target map based on disparity map is firstly calculated to detect visually salient contents and obtain 3D straight-lines of original stereoscopic image.Then,content-aware random matching points are introduced as the stereoscopic constraints.After that,each image is represented as a grid mesh and model an energy distortion function.Each quad mesh is scaled to the target size by minimi-zing total energy function.Finally,the target stereoscopic image is obtained by interpolation and mapping.Experimental results demonstrate its effectiveness in this paper.