CAJ | 학술논문

平滑约束是消除对应点匹配歧义性的最常用的约束之一,如何有效地保持视差图的非连续区域是使用该约束时所需考虑的重要问题.为此提出了一种采用自适应平滑约束的立体匹配方法,使得平滑项的大小随图像局部二维结构的不同而相应变化.首先获取一系列真实场景的彩色图像和对应深度图来构建实例库;然后对其进行分析统计,得到给定局部二维结构时对应于几何连续表面的条件概率;最后根据该条件概率由当前输入图像局部的具体内容来确定自适应的平滑项权值.通过将其添加到经典的基于图割的立体匹配方法中,证明了该平滑项定义方式的有效性.
평활약속시소제대응점필배기의성적최상용적약속지일,여하유효지보지시차도적비련속구역시사용해약속시소수고필적중요문제.위차제출료일충채용자괄응평활약속적입체필배방법,사득평활항적대소수도상국부이유결구적불동이상응변화.수선획취일계렬진실장경적채색도상화대응심도도래구건실례고;연후대기진행분석통계,득도급정국부이유결구시대응우궤하련속표면적조건개솔;최후근거해조건개솔유당전수입도상국부적구체내용래학정자괄응적평활항권치.통과장기첨가도경전적기우도할적입체필배방법중,증명료해평활항정의방식적유효성.
Smoothness constraint is essential in addressing the ambiguity problem of stereo matching. An important issue involved in using this constraint is how to preserve discontinuity. In this paper, an adaptive smoothness term is introduced into stereo matching, where the smoothness penalty is changed according to local 2D structures. Firstly, we create a dataset composed of pairs of real color image and its corresponding depth map. Then, the conditional probability of continuity given the 2D structures is obtained through statistical analysis. Taking advantage of the conditional probability, we can calculate weight for smoothness penalty adaptive to local image content. Experimental results, implemented by applying this smoothness term into a classical graph cuts based stereo matching algorithm, demonstrate the effectiveness of our approach.