Geometrically overlaying di ff erent representations of an object in a scene By: Senate Taka CS 104 Final Project

Problem Statement: visually aligning representations of the same object in a 3D scene on top of each other, such that if the two representations are of the same size, they appear to be directly on top of each other

The objects to align (in each image) are on the left of the image. The result of the alignment is to the right.

Usual Approaches: Do image registration: Modifies an object so that it fits a target object. We apply local affine transformations to local features, but force the global transformations to be smooth. –Farid et al. Slight Problem: For most of the objects we will be considering, we want to keep the shape of the two objects, but just show a rendering of them in one location in space. So…we take another approach.

Our Approaches: Geometric Hashing Statistical alignment (For local transformations in the objects). We will combine the two to come up with effective alignment technique.

Geometric Hashing, a closer look Hash objects into database based on transformation invariant features. When identifying objects, do a majority count of the object representations returned to see which one of the hashed object is most likely to be the one we are looking for.

Geometric Hashing, object recognition Lamdan et. al.