基于YCbCr光场数据的视差重建算法  

Disparity Reconstruction Algorithm Based on YCbCr Light Field Data

作　　者：史立根 邱钧 刘畅 邓小娟 Shi Ligen;Qiu Jun;Liu Chang;Deng Xiaojuan(Institute of Applied Mathematics,School of Applied Science,Beijing Information Science and Technology University,Beijing 100101,China)

机构地区：[1]北京信息科技大学理学院应用数学研究所,北京100101

出　　处：《激光与光电子学进展》2022年第2期282-293,共12页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61931003,61871042,61801031);北京市教委科研计划一般项目(KM201911232009)。

摘　　要：在光场计算成像中,场景深度重建问题被转化为视差重建问题。通过引入YCbCr颜色空间光场数据实现了基于光场数据单体化的高效视差重建。在Y通道进行区域匹配可避免RGB三通道匹配的冗余计算,进而提高了匹配效率。在Cb、Cr通道进行单体化可实现单体边缘去遮挡和内部视差一致性约束,解决了遮挡区域和平滑区域的误匹配问题。Cb、Cr色度信息为单体化提供了有效聚类信息,将区域生长和二分法相结合实现了单体的精准分割。在单体边缘处,根据单体边缘选取匹配窗口的形状和可见视点,避免了边缘遮挡误匹配的出现。在单体内部中,基于视差一致性先验实现了视差图的优化。模拟数据实验和实际数据实验的结果表明,所提方法在纹理、遮挡和平滑区域均能实现精确重建,对遮挡区域的视差重建具有很强的鲁棒性。In the light field computational imaging,scene depth reconstruction is transformed into a problem of disparity reconstruction.Efficient disparity reconstruction based on monomer light field data is realized by introducing YCbCr color space light field data.Region matching in Y channel can avoid the redundant calculation of RGB three-channel matching,and improve the matching efficiency.Monomer edge occlusion and internal disparity consistency constraint can be realized by Cb,Cr channel monomer to solve the problem of mismatching between occlusion region and smooth region.Cb,Cr chromaticity information provides effective clustering information for monomer.The accurate segmentation of monomer is realized by combining the region growth and dichotomy.At the edge of the monomer,the matching window shape and the visible viewpoint are selected according to the edge of the monomer to avoid the appearance of the edge occlusion mismatching.In the monomer,the disparity map is optimized based on disparity consistency prior.Experimental results of simulated data and real data show that the proposed method can achieve accurate reconstruction in texture,occlusion,and smooth regions,and has strong robustness for disparity reconstruction in occlusion regions.

关 键 词：成像系统 光场 视差重建 YCBCR颜色空间 单体化 高效匹配 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]