| CPC G06T 7/80 (2017.01) [G02B 27/4205 (2013.01); G06V 10/14 (2022.01); H04N 17/002 (2013.01); H04N 23/90 (2023.01)] | 20 Claims |
|
1. A system for determining intrinsic parameters of a camera, the system comprising:
a camera;
a collimator assembly, wherein the camera is placed in front of the collimator assembly, wherein the collimator assembly includes a two-sided diffractive optical element, wherein a grating pattern is formed on each surface of the two-sided diffractive optical element; and
a processor coupled to the camera to receive image data from the camera, wherein the processor stores executable instructions that, when executed by the processor, cause the processor to:
receive an image from the camera, wherein the grating pattern formed on each surface of the two-sided diffractive optical element is selected to reduce a brightness of a central intensity peak on the image to a predetermined amount; and
determine intrinsic parameters of the camera based on an intensity peak on the image and virtual light source formed by the two-sided diffractive optical element that corresponds to the intensity peak.
|