| 朱荣华,葛广英,张广世,申哲,孙群.基于Census变换和多扫描线优化的半全局立体匹配算法[J].光电子激光,2019,30(9):978~984 |
| 基于Census变换和多扫描线优化的半全局立体匹配算法 |
| Semi-global stereo matching algorithm based on AD-Census transform and multi- scan line optimization |
| 投稿时间：2019-03-19 |
| DOI： |
| 中文关键词: 半全局立体匹配 AD-Census变换 匹配代价 动态交叉域 正则化 多扫描线优化 视差图 |
| 英文关键词:semi-global stereo matching AD-Census transform matching cost dyn amic cross-domain regularization multi-scan line optimization disparity map |
| 基金项目:中央引导地方科技发展专项资金计划资助项目 (1.聊城大学 物理科学与信息工程学院,山东 聊城252000; 2.聊城大学 机械与汽车工程学 院,山东 聊城252000) |
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| 中文摘要: |
| 为了解决局部匹配算法误匹配率高的问题,提出 一种基于AD-Census变换和多扫描线优化的半全局匹配算 法。首先,通过绝对差AD算法与Census变换相结合作为相似性度量函数计算初始匹配代价, 并构建动态交叉域聚合 匹配代价；然后在代价聚合计算阶段,将一维动态规划的代价聚合推广到多扫描线优化,利 用上下左右四个方向逐 次扫描进行匹配代价聚合的计算,并引入正则化约束以确保匹配代价聚合的一致性,大大减 少初始代价中的匹配异 常点；最后,运用简单高效的胜者为王策略选出像素点在代价聚合最小时对应的视差,并在 视差细化阶段,采用左 右一致性检测和抛物线拟合方法进行后续处理以提高立体匹配的正确率。实验结果证明,该 算法可获得高匹配率的视差图并且耗时较少。 |
| 英文摘要: |
| In order to solve the problem of high mismatch rate of local matching algorithm,a semi-global matching algorithm based on AD-Census transform and multi-scan line optimization is proposed.Fir stly,the initial matching cost is calculated by combining the absolute difference AD algorithm with the Census transform as the similarity measure function.At the same time, building dynamic cross-domain is to aggregate matching cost.Secondly,matching cost aggregating for one-dimensional dynamic programming is extended to the multi-scan line optimization.The calculation of matching cost aggregation is performed by successive scanning in four directions of up,down,left,and right,and introdu cing a regularization constraint algorithm is to ensure consistency of matching cost aggregation,which can reduce the a large nu mber of matching abnormal points of the initial matching cost in the cost aggregation calculation stage.Finally,the Winner-Ta kes-All algorithm is used to select the parallax corresponding to the pixel when the cost aggregation is minimal,and the left an d right consistency detection algorithm and parabola fitting algorithm are used for subsequent processing to improve the cor rect rate of stereo matching in the parallax refinement stage.Experimental results show that the algorithm proposed in this paper can obtain dense disparity map with high matching rate and less time consuming. |
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