Google llc (20250148567). Camera Parameter Preconditioning for Neural Radiance Fields
Camera Parameter Preconditioning for Neural Radiance Fields
Organization Name
Inventor(s)
Keunhong Park of San Francisco CA US
Ricardo Martin-brualla of Seattle WA US
Jonathan Tilton Barron of Alameda CA US
Philipp Henzler of San Francisco CA US
Benjamin Joseph Mildenhall of London GB
Camera Parameter Preconditioning for Neural Radiance Fields
This abstract first appeared for US patent application 20250148567 titled 'Camera Parameter Preconditioning for Neural Radiance Fields
Original Abstract Submitted
systems and methods for training a machine-learned model are disclosed herein. the method can include obtaining, by a processor, a plurality of images, each image having a set of parameter values comprising values for a plurality of camera parameters and determining a covariance matrix for the plurality of camera parameters with respect to a plurality of projected points generated via evaluation of a projection function. the method can also include performing a whitening algorithm to identify a preconditioning matrix that, when applied to the sets of parameter values, results in the covariance matrix being approximately equal to an identity matrix and performing an optimization algorithm on the plurality of sets of parameter values, performing the optimization algorithm can include applying an inverse of the preconditioning matrix to the plurality of sets of parameters in a forward prediction pass and applying the preconditioning matrix in a backward gradient pass.