机器视觉中彩色伪随机编码投影系统及标定

为了研究基于三维场景单幅二维图像的不标定欧式重构理论，需要构造一个编码投影系统，并预标定出其相关参数，依据伪随机彩色编码的原理，代数射影几何中的交比不变性质，以及被视为逆向照相机投影系统的标定数学模型，提出了投影系统的标定步骤和方法．将一幅伪随机编码图案与投影系统相结合，构造了一种新的视觉投影系统．标定实验表明，由此系统将伪随机彩色编码图案投射到靶标空间，利用CCD照相机拍摄其图像，进行图像的特征点提取和数据处理后得到了投影系统的参数。

Multicolor pseudo-random array pattern projector and its calibration

A encoding projector is needed and its parameters must be known before a 3D scene can be constructed in the real Euclidean space with an uncalibrated camera based on a single 2D image. The theory of multicolor codes of pseudo-random array, the invariance of cross-ratio in algebraic projective geometry and the calibration model of projector which is regarded as a reverse camera are presented, and detailed steps to be taken for calibrating the projector are described. A pattern with multicolor codes of pseudo-random array is projected through a projector to construct a new projecting system. After the pattern is projected onto a target and its image is taken by a CCD camera, many interest points can be extracted from the image and the parameters of the projector are obtained from the calibration model.