| 蓝建梁,丁友东.基于结构光与单应的投影机几何校正[J].光电子激光,2015,26(5):1010~1018 |
| 基于结构光与单应的投影机几何校正 |
| Structured light and homography based projector geometric correction |
| 投稿时间：2014-11-22 |
| DOI： |
| 中文关键词: 投影机 几何校正 结构光 单应矩阵 光敏传感器 |
| 英文关键词:projector geometric correction structured light homography matrix optic sens itive sensors |
| 基金项目: |
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| 摘要点击次数: 1145 |
| 全文下载次数: 6 |
| 中文摘要: |
| 提出了一种基于结构光与单应的投影机 自动几何校正方法。利用分布在感兴趣点(POI)位置上的光敏传感器捕获投影机投射的结构 光模式序列,并转化为投影机像平 面内的坐标值,计算出目标投影平面与投影机像平面间的单应矩阵；再利用单应矩阵对投影 图像进行透视 变换,实现几何校正和显示区域最大化。通过不同环境条件下实验测试,本文方法能准确地 定位POI的坐标,使投影画面准确投射到目标投影面上,并达到较高精度。 本文方法操作简 单快捷,无需借助相机, 且校正过程不易受外部环境影响,具有较好的鲁棒性。 |
| 英文摘要: |
| Vision based projector geometric correction involves complicated geometrical transforms and calibration procedures,and is susceptible to poor illumination and background or o ther external environmental factors.In order to improve the efficiency and robustness of the geometric corr ection procedure,a new method based on structured light and homography is proposed.The proposed method levera ges the light sensors distributed at those points of interest (POI) to capture the structured light pa tterns projected by projector and converts them to the coordinates relative to the projector′s image plane,and t hen calculates the homography matrix between the target projection surface plane and the projector image plane.After that,the homography matrix is exploited to perform the perspective transform on the images to be projected,to pre-warp the image and maximize the display area.Experiments are carried out under various environmental condit ions,indicating that the coordinates of the POI could be precisely attained,thus projecting the images correctly to the target projection surface,and achieving high precision.The proposed approach is simple,fast and robust,not vulnerable to the external environment factors,which means that it could be complementary to those vision- based methods. |
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