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      <title>三点星位透视矫正：最少点击量的数学最优解</title>
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      <description>上篇文章提出了 2 点斜对角方案，用中点凑第三点来做仿射预估。但这篇文章要指出：这个方案存在一个无法修复的数学缺陷——三个点共线导致仿射矩阵退化</description>
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