  We propose a novel space-rescaling technique for registering dissimilar
physical-virtual spaces by utilizing the effects of adjusting physical space
with redirected walking. Achieving a seamless immersive Virtual Reality (VR)
experience requires overcoming the spatial heterogeneities between the physical
and virtual spaces and accurately aligning the VR environment with the user's
tracked physical space. However, existing space-matching algorithms that rely
on one-to-one scale mapping are inadequate when dealing with highly dissimilar
physical and virtual spaces, and redirected walking controllers could not
utilize basic geometric information from physical space in the virtual space
due to coordinate distortion. To address these issues, we apply relative
translation gains to partitioned space grids based on the main interactable
object's edge, which enables space-adaptive modification effects of physical
space without coordinate distortion. Our evaluation results demonstrate the
effectiveness of our algorithm in aligning the main object's edge, surface, and
wall, as well as securing the largest registered area compared to alternative
methods under all conditions. These findings can be used to create an immersive
play area for VR content where users can receive passive feedback from the
plane and edge in their physical environment.
