barrel distortion meaning in English

光栅桶形失真
桶形畸变[ 横向放大率随视场的增大而减小的畸变，它使对称于光轴的正方形物体的
桶形畸变；负畸变
桶状失真

To make the image height of f - theta lens in proportional to the scanning angle , it is primary to introduce barrel distortion
本质上f - theta镜头通过引入桶形畸变,使得像高线性正比于扫描角。
During the research on image distortion correction , the paper receives a good result on camera calibration by improving the traditional barrel distortion model , and expands the current theories on image distortion correction
在图像失真校正的研究中，本文对传统的桶形失真模型进行了改进，取得了较好的校正效果，扩展了现有的图像失真校正理论。