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中文摘要：
鱼眼镜头所拍摄的图像具有严重的畸变。为了消除鱼眼图像的畸变，提出了一种改进的基于经线模型的校正算法。该算法首先建立经线模型，然后利用改进的校正算法对鱼眼图像进行校正，再建立半圆模型对校正过的图像进行修正，得到最终的图像。该算法不需要进行鱼眼镜头的标定以及参数的估计，通过建立全局统一的模型，对鱼眼图像进行校正。通过对模型图像和真实图像进行实验，结果表明，文中提出的算法能高效快捷地对鱼眼图像进行校正，而且具有较好的效果。
英文摘要：
Images taken by fisheye lenses often have severe distortion. In order to correct fisheye images,propose an improved correction method based on longitude model. A longitude model is built firstly. Then an improved correction method is presented to correct fisheye images. Finally,amend the corrected images by using semi-circle model. This method corrects fisheye images by establishing a global model and does not require calibration and parameter estimation. Based on the model and real images experiments,results show that the improved fisheye image distortion correction method proposed in this paper can correct the distortion of fisheye images fast and efficient-ly,and has good performance.
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