Abstract
该文针对折反射全向摄像机的不同配置可能使全向图像和透视图像存在的镜像关系，而尺度不变特征变换算法并不对镜像保持不变性，提出将透视图像进行一次水平翻转，然后将原图与翻转后的图像分别与全向图像进行匹配，取效果好的匹配作为最终结果，从而实现镜像不变。针对全向图像的环形畸变，提出先将透视图像变换为扇形图像后再进行匹配。实验结果显示，将透视图像变换为扇形图像后再与全向图像进行匹配，匹配点总数增加，而错误匹配点数减少，匹配结果明显好于变换前的匹配结果。
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