Patent ID: 11871110
Assignee: INTEL CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A system for fisheye camera calibration comprising:
a memory configured to store an input fisheye image; and
one or more processors coupled to the memory, the one or more processors to:
apply a first convolutional neural network to a first input volume comprising the input fisheye image to generate a focal length, a unified camera model parameter, and a radial distortion parameter for a unified camera model corresponding to a fisheye camera used to attain the input fisheye image;
project the input fisheye image to an estimated equirectangular image using the focal length, the unified camera model parameter, and the radial distortion parameter;
difference the input fisheye image and the estimated equirectangular image to generate a difference image;
apply a second convolutional neural network to a second input volume comprising the input fisheye image and the difference image to generate a principle point for the camera model; and
output the focal length, the unified camera model parameter, the radial distortion parameter, and the principle point for the unified camera model.