桶形畸变又称桶形失真，它是由镜头引起的成像画面呈桶形膨胀状的失真现象。桶形畸变虽然不影响成像清晰度，但却影响成像的位置精度，这会给图像分析和图像测量带来误差，甚至是误判。
为了修正广角镜头的桶形畸变，本文提出了一种基于样条函数的修正方法。
Method for correction of barrel distortion due to wide-angle lenses based on a polynomial;
通过修正，由“桶形”畸变所造成的图像扭曲得到明显改善。
Then the spatial distortion of another measured image was corrected according to this relation and the correction results were evaluated.
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