适应弱纹理与几何特征的十字匹配块的立体匹配
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江苏航空职业技术学院

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TP391.4 TN29

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镇江市重点研发计划项目(SH2023098);江苏高校哲学社科研究项目(2022SJYB2303);校级重点课题(JATC22010101);本研究得到江苏高校‘青蓝工程’资助。.


Stereo matching of cross matching blocks adapted to weak texture and geometric features
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    摘要:

    针对弱纹理、弱几何特征的双目视图,生成视差质量较差的问题,提出了适应弱纹理与几何特征的十字匹配块的立体匹配算法。采用双线性视差插值框架,以提高时间效率;通过双目视图中少量规则点计算其整体视差变化趋势,以较少时间确定视图的最大视差和规则点的视差;融合census序列、色彩和梯度等信息计算十字匹配块的代价,以增强弱纹理特征的视图的视差生成质量;基于初始视差图像的局部几何特征,十字匹配块和子块旋转相应的最优角度进行代价计算,以增强弱几何特征的视图的视差生成质量。实验结果表明,与SGM、AD-Census、PMS、ELAS等算法比较,生成的视差图像质量整体效果好,对于弱纹理、弱几何特征局部区域,视差质量提升明显;基于6对测试图像,与PMS算法相比,视差图像的MSE平均减少30.97%,执行时间平均为其1/4。

    Abstract:

    Aiming at the problem of poor disparity quality in binocular views with weak texture and weak geometric features, a stereo matching algorithm adapted to cross matching blocks of weak texture and geometric features is proposed. Adopting a bilinear disparity interpolation framework to improve time efficiency; Calculate the overall trend of disparity variation through a small number of regular points in a binocular view, in order to determine the maximum disparity of the view and the disparity of the regular points in less time; To enhance the quality of disparity generation in views with weak texture features, the cost of cross matching blocks is calculated by fusing information such as census sequences, colors, and gradients; Based on the local geometric features of the initial disparity image, the cost calculation is performed by rotating the optimal angles of the cross matching block and sub blocks to enhance the disparity generation quality of views with weak geometric features. The experimental results show that compared with algorithms such as SGM, AD-Census, PMS, ELAS, etc., the generated disparity images have better overall quality. For weak texture and weak geometric feature local areas, the disparity quality is significantly improved. Based on 6 pairs of test images, compared with the PMS algorithm, the MSE of disparity images is reduced by an average of 30.97%, and the average execution time is 1/4 of it.

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  • 收稿日期:2024-08-13
  • 最后修改日期:2024-09-05
  • 录用日期:2024-09-05
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