基于投影光线交会面不平性的投影器精确检校研究

Research on accurate calibration of projector based on uneven intersection flat from projection light

借鉴数码相机检校的方法对投影器进行检校,即采用的投影器检校模型与数码相机的检校模型类似,但检校精度却低于数码相机的检校精度,从物方详细分析其原因并对由于纸张(避免成像在平面格网板上虚拟影像的格网点与真实格网点的混淆,使用白纸进行遮挡)厚度引起的物方点误差,通过模拟数据对物方点的Z值进行补偿以提高投影器检校精度。经过实验及结果分析,证明该方法具有很好的可行性。

Based on the same calibration model,the calibration precision of projector is lower than that of CCD camera.It was analyzed by the following aspects,such as image and space.For the space point error by paper thickness and distortion,this paper compensated the Z value of space point through stimulant data.Then it completed the improvement of projector calibration successfully after bundle adjustment and the calculation to the projector parameters again.Its feasibility was validated through our experiments.