基于三通道二值条纹离焦投影的快速三维测量

Fast Three-Dimensional Measurement Based on Three Channel Binary Fringe Defocused Projection

提出了一种基于三通道二值条纹离焦投影的三维测量方法。将相移条纹编码到三个彩色通道中,在投影仪处,用三通道分离的二值数字图像作为输入,在单个相机帧时间内顺序投影三通道的离焦条纹,用彩色相机获得三通道融合的彩色条纹图像。对彩色三通道条纹进行解耦,用黑白相机标定测量系统中彩色通道的混叠效应。用三通道解耦的条纹信息进行相位计算和三维重建,结果表明,相比传统彩色投影测量,本方法的速度和重建精度有明显提升,且适用于测量彩色物体和动态物体。

A three-dimensional measurement method based on three channel binary fringe defocused projection is proposed in this work.The phase-shifting fringes are encoded into three color channels.At the projector,the binary digital images separated from three channels are used as input.The defocusing fringes of three channels are projected sequentially in a single camera frame time,and the fusion color fringe images of three channels are obtained by color camera.The color three channel fringes are decoupled and the aliasing effect of color channels in the measurement system is calibrated with a black and white camera.Phase calculation and three-dimensional reconstruction are performed based on decoupled fringe information.The results suggest that compared with the traditional color projection measurement,the speed and rebuilding accuracy of the proposed method are greatly improved,and the proposed method is suitable for measuring color objects and dynamic objects.