具重复特征的大物面自动视觉检测中的亚像素级拼接

针对自动视觉检测系统中，难以获得具有重复纹理特征的大面积物体的高精度图像问题，提出了一种二维图像光栅的亚像素级定位拼接新方法。采用光栅尺记录物体的位置信息，引入圆盘格标定板对二维运动平台X、Y轴与相机X、Y轴之间的夹角进行准确标定，并建立基于全局物理直角坐标系的二维拼接模型完成图像的拼接。实验结果表明，该方法的标定重复精度可以达到10-4 rad量级，拼接的物理误差为8 μm，拼接精度比校正前提高了近8倍，比已见报道提高1倍以上。该方法已成功应用于导航卫星接收天线电路的在线检测设备，并可广泛推广至检测精度要求达到亚像素级的机器视觉自动化检测领域。

Abstract

Focused on the problems that it′s difficult to obtain high precision mosaic image of object having duplicate texture in the automatic visual inspection system, a new two-dimensional (2D) image mosaic method based on sub-pixel grating positioning is presented. The method uses grating to record positions of object and calibration plate to accurately calibrate angles of X and Y axes between platform and camera, and build a 2D stitching model based on global Cartesian coordinate system to complete image stitching. Experimental results show that the method′s calibration repeatability reaches 10-4 rad order of magnitude, with average physical error of 8 μm, and stitching precision increases nearly 8 times than that of not correction, 2 times better than the method that has been reported. The method has been successfully used in the online automatic inspection equipment for ceramic substrate of navigation satellite′s receiving antenna circuit. The research result can be widely applied in machine vision automated inspection fields that require sub-pixel level detection precision.

参考文献

[1] Bruce Leblanc, N Christopher, A Peter, et al.. Topics in Modal Analysis II, Volume 6 [M]. NewYork: Springer, 2012, 277-284.

[2] Chen Xiaowu, Li Qing, Li Xin, et al.. Video motion stitching using trajectory and position similarities [J]. Science China Information Sciences, 2012, 55(3): 600-614.

[3] C Javier, Andrew J Davison, José María Martínez Montiel. Structure from Motion Using the Extended Kalman Filter [M]. Berlin: Springer, 2012. 13-31.

[4] Zhaoxia Fu, Wang Liming. Optimized design of automatic image mosaic [J]. Multimedia Tools and Applications, 2013, 14(2): 1-12.

[5] Zhou Ping , Luo Xiling. An efficient multi-view image stitching alogrithm based on CSIFT features [J]. Future Communication, Computing, Control and Management, 2012, 142: 407-413.

[6] S Samsudin, S Adwan, H Arof, et al.. Development of automated image stitching system for radiographic images [J]. Journal of Digital Imaging, 2013, 26(2): 361-370.

[7] S M Heining, L Wang, N Navab. Clinical application of CAMC-long bone X-ray image stitching [J]. Medical Physics and Biomedical Engineering, 2009, 25(4): 2323-2325.

[8] MyungHo Ju, Hang-Bong Kang. A new simple method to stitch images with lens distortion [J]. Advances in Visual Computing, 2010, 6454: 273-282.

[9] Matthew Brown, David G Lowe. Automatic panoramic image stitching using invariant features [J]. International Journal of Computer Vision, 2007, 74(1): 59-73.

[10] 吴宪祥, 郭宝龙, 王娟. 基于相位相关的柱面全景图像自动拼接算法[J]. 光学学报, 2009, 29(7): 1824-1829.

Wu Xianxiang, Guo Baolong, Wang Juan. Cylindrical panoramic image automatic mosaic algorithm based on phase correlation [J]. Acta Optica Sinica, 2009, 29(7): 1824-1829.

[11] 王会峰, 刘上乾, 汪大宝, 等. 旋转扫描序列图像的全景图拼接方法[J]. 光学学报, 2009, 29(5): 1211-1215.

Wang Huifeng, Liu Shangqian, Wang Dabao, et al.. Panoramic image mosaic method for rotary scanning serial image [J]. Acta Optica Sinica, 2009, 29(5): 1211-1215.

[12] 樊庆文, 王小龙, 侯立, 等. 基于等距序列图像的快速拼接技术[J]. 四川大学学报(工程科学版), 2005, 37(1): 139-142.

Fan Qingwen, Wang Xiaolong, Hou Li, et al.. Speeding mosaic technology based on isometry serial image [J]. Journal of Sichuan University (Engineering Science Edition), 2005, 37(1): 139-142.

[13] 谢佳豪. 基于计算机视觉的印刷电路板自动检测系统的研究[D]. 西安: 西安理工大学, 2004. 12-20.

Xie Jiahao. Automatic Inspection System for PCB Based on Computer Vision [D]. Xi′an: Xi′an University of Technology, 2004. 12-20.

[14] 陈世哲, 胡桃, 刘国栋, 等. 基于光栅的快速精确图像拼接[J]. 光学精密工程, 2006, 14(2): 242-246.

Chen Shizhe, Hu Tao, Liu Guodong, et al.. Fast and precision image mosaic based on grating [J]. Optic Precision Engineering, 2006, 14(2): 242-246.

[15] 黄永林, 叶玉堂, 乔闹生, 等. 基于快速模糊C均值聚类算法的红外图像分割[J]. 强离子与激光束, 2011, 23(6): 1467-1470.

Huang Yonglin, Ye Yutang, Qiao Laosheng, et al.. Infrared image segmentation based on fast fuzzy C-means clustering [J]. High Power Laser and Particle Beams, 2011, 23(6): 1467-1470.

[16] 李为民, 俞巧云, 刘超. 采用分离式差分标定靶的单摄像机标定方法[J]. 光学学报, 2006, 26(5): 697-701.

Li Weimin, Yu Qiaoyun, Liu Chao. Calibration method with separation pattern of a single-camera based on difference coordinates [J]. Acta Optica Sinica, 2006, 26(5): 697-701.

宋昀岑, 陈伟, 叶玉堂, 刘娟秀, 黄柄权, 郭涛, 赵津. 具重复特征的大物面自动视觉检测中的亚像素级拼接[J]. 光学学报, 2014, 34(3): 0315002. Song Yunceng, Chen Wei, Ye Yutang, Liu Juanxiu, Huang Binquan, Guo Tao, Zhao Jin. Sub-Pixel Stitching Method for Large Object with Duplicate Texture of Automatic Visual Inspection[J]. Acta Optica Sinica, 2014, 34(3): 0315002.

具重复特征的大物面自动视觉检测中的亚像素级拼接

关于本站 Cookie 的使用提示

全站搜索

具重复特征的大物面自动视觉检测中的亚像素级拼接

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索