It is shown that, if algorithms for performing the QR decomposition are free from calculation of square root, the related iterative refinement algorithms can also be square root free.
证明了：若用QR分解所作的算法无需计算平方根，则相应的迭代加细算法也无需计算平方根。
The initial camera parameters are computed using Root Mean Square and close-form algorithm on a distortion-free camera model.
在未考虑畸变的情况下通过最小二乘法求取相机的初始内外参数；
We break free from our mortal bonds, and with a ware of magic wands our square-root signs become unglneg, and love for me has been renewed.
随着魔棒的挥舞，我们的根号被掀开，而我的爱也焕然一新。
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