【摘要】 在用PIV技术测量流速场时 ,会因图像的几何变形而引起计算的误差。本文试验标定了不同型号的摄像系统的变形误差 ,论证了图像几何变形的特性 ,并提出了相应的校正公式 ,推荐的系统配置经校正后的图像几何变形误差小于 0 .4个象素。更多还原

【Abstract】 The error of image geometric distortion induced by the CCD camera greatly reduces the computational precision when using PIV technique to measure the velocity field. The properties of the image distortion were investigated and the distortion error in various imaging systems was acquired from experiments. Thus, calibration formulas were obtained. The error after calibration was less than 0.4 pixel for the recommended system.更多还原