# Locally Non-rigid Registration for Mobile HDR Photography

## Supplemental Material — Comparison with SIFT

Working Bushes Volleyball Breakroom Phonecall Pizzeria Diner

### Bushes

Cycle through the images by pressing '1' to '6'. The images were downsized to 35% of the original size to limit the supplementary material size to 10MB.
Reference image | Source image | Source warped (OURS) | Source warped (SIFT) | HDR (OURS) | HDR (SIFT)

To show the robustness of our method, the pictures in this stack were captured with a predefined delay (two 33ms frames were dropped between the capture of the source and reference images). The extreme darkness of the reference image causes SIFT to find only few matches (see paper), resulting in a poor warp of the source image ('4'). Our matcher finds enough reliable correspondences to correctly warp the source image ('3'). However, our modification of Exposure Fusion can compensate for the registration problems, even in the case of a wrong warp, at the cost of a loss of range: flip bewtween our HDR and the one created with the source warped with the SIFT correspondences ('5'-'6')