Invariants of objects and their images under surjective maps
Invariants of objects and their images under surjective maps
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满射映射下物体及其图像的不变量
DOI:
10.1134/s1995080215030063
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发表时间:
2015
影响因子:
0.7
通讯作者:
Olver, P. J.
中科院分区:
文献类型:
--
作者:
Kogan, I. A.;Olver, P. J.
We examine the relationships between the differential invariants of objects and of their images under a surjective maps. We analyze both the case when the underlying transformation group is projectable and hence induces an action on the image, and the case when only a proper subgroup of the entire group acts projectably. In the former case, we establish a constructible isomorphism between the algebra of differential invariants of the images and the algebra of fiber-wise constant (gauge) differential invariants of the objects. In the latter case, we describe residual effects of the full transformation group on the image invariants. Our motivation comes from the problem of reconstruction of an object from multiple-view images, with central and parallel projections of curves from three-dimensional space to the two-dimensional plane serving as our main examples.
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