本来想介绍projective transformation(投影变换)的,想了想还是应该先介绍一下比较简单的affine transformation(仿射变换),以便给自己一个更清晰的思路。其实仿射变换是投影变换的一种特殊形式,在图像处理中,大部分图像变换算法用仿射变换就可以得到不错的效果,并且数学意义比较明确易懂,因此仿射变换相对来说更常用一些。 首...
In general, an affine transformation is a composition of rotations, translations, dilations, and shears.Projective transformationsProjective transformations do not move any objects from the affine space R3 to the plane at infinity or conversely.
case of Mumford’s geometric invariant theory (which concerns projective good quotients) the problemcan be reduced to the case of an action of a torus... A.,Biaŀynicki-Birula,J.,... - 《Transformation Groups》 被引量: 33发表: 1996年 Torus quotients of homogeneous spaces - minimal dimen...
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