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

Claim 15:
16. At least one non-transitory machine readable medium comprising a plurality of instructions that, in response to being executed on a device, cause the device to perform fisheye camera calibration by:
applying a first convolutional neural network to a first input volume comprising an 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;
projecting the input fisheye image to an estimated equirectangular image using the focal length, the unified camera model parameter, and the radial distortion parameter;
differencing the input fisheye image and the estimated equirectangular image to generate a difference image;
applying 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
outputting the focal length, the unified camera model parameter, the radial distortion parameter, and the principle point for the unified camera model.