Abstract
Image comparison, which consists in deciding whether or not several images represent some common or similar objects, is a problem recognized as difficult, especially because of the viewpoint changes between images. The apparent deformations of objects caused by changes of the camera position can be locally approximated by affine maps. This has motivated the quest for affine invariant local descriptors in the last 15 years. Unfortunately, existing descriptors cannot handle angle viewpoint differences larger than 45 degrees, and fail completely beyond 60 degrees. In this thesis, we address several strategies to resolve this limitation, and we show at the end that they complete each other. Three main branches to obtain affine invariance are actively being investigated by the scientific community:
| Original language | English |
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| Title of host publication | École Normale Supérieure Paris |
| Publication status | Published - 10 Jul 2020 |