How to Use the Cross Ratio to Compute Projective Invariants from Two Images
نویسنده
چکیده
We are interested in the applications of invariant theory to computer vision problems. A survey and clariication of the diierent invariant calculation methods are detailed in our extented technical report 1]. In this paper, we concentrate on 3D invariants from pairs of images instead of invariants related to the planar projective transformations from monocular image, that have been already largely studied by many people. Especially, invariants of diierent conngurations coming from diierent combinations of 3D points, 3D lines, and conics are under consideration, and the stabilities of the invariants computed diierently are compared. We conclude by showing to what extent these invariant measures can be used for recognition and indexing.
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