Snap Inc.
Light invariant pattern mapping

Last updated:

Abstract:

A correlation system can be implemented on a user device (e.g., smartphone) to perform image processing tasks e.g., point to point correlations for tasks such as alignment, tracking, and reconstruction of model data. The correlation system can implement normalized cross correlation in a least squares optimization scheme without use of approximations. Normalized cross correlation optimized via least squares can further implement global and local cost functions that are invariant to dynamic lighting conditions.

Status:
Grant
Type:

Utility

Filling date:

28 Jun 2019

Issue date:

4 Jan 2022