Patent ID: 11954894
Assignee: RIVIAN IP HOLDINGS, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H  B | IPC B  G  H

Claim 12:
13. A system for determining blockage of a camera, the system comprising:
a camera system for capturing a sequence of images;
control circuitry coupled to the camera system, wherein the control circuitry is configured to:
apply a partition grid comprising a plurality of locations to each image of the sequence of images to form a plurality of regions of each image, wherein each image of the sequence of images is indexed in time,

determine at least one spatial feature corresponding to the partition grid and at least one temporal feature corresponding to the partition grid, wherein:
one or more of the at least one spatial feature or the at least one temporal feature corresponds to a pixel feature characterized by a value that is compared to a dynamic range of values, and
the dynamic range of values is modified based on a computed variation in pixel values in a region of adjacent locations of the partition grid;

generate a sequence of binary classifications for each location of the plurality of locations based on the at least one spatial feature, the at least one temporal feature, and reference information, and
apply a smoothing technique to the sequence of binary classifications to determine a subset of regions that are blocked; and
an output interface configured to generate an output signal based on the subset of regions.