公开(公告)号：US12003862B2

公开(公告)日：2024-06-04

申请号：US17845478

申请日：2022-06-21

Applicant: Snap Inc.

Inventor： Julian Grahsl ,  Alexander Kane

IPC: H04N23/72 ,  H04N13/111 ,  H04N13/243

CPC classification number: H04N23/72 ,  H04N13/111 ,  H04N13/243 ,  H04N2213/008

Abstract: A method of determining an image capture timestamp offset or error includes generating optical flashes at an optical flash rate. A set of images of the optical flashes are captured at an image capture rate. The image capture rate is different from the optical flash rate, and each image includes an associated image timestamp. Signals associated with the generation of the optical flashes are also timestamped. The intensity of each image in the set of images is determined, and the image having the greatest intensity in the set of images is identified. The timestamp offset or error is determined as the difference between the timestamp of the image having the greatest intensity and the timestamp of the corresponding optical flash.

公开(公告)号：US20230262207A1

公开(公告)日：2023-08-17

申请号：US18103829

申请日：2023-01-31

Applicant: Snap Inc.

Inventor： Alex Feinman ,  Julian Grahsl ,  Jason Heger ,  Gerald Nilles

IPC: H04N13/344 ,  H04N13/279 ,  G06F13/42

CPC classification number: H04N13/344 ,  H04N13/279 ,  G06F13/4282 ,  G06F2213/0038

Abstract: Eyewear device including two system on a chip (SoC) that share processing workload. The SoCs communicate with each other using a low-power bridge, e.g., a mobile industry processor interface (MIPI) bridge including a display serial interface (DSI) to camera serial interface (CSI) bridge. The MIPI bridge converts DSI images from one SoC to CSI images, and also communicates metadata. Another SoC receives and processes the CSI images. The other SoC has a buffer that receives both the CSI images and the metadata, and separates the CSI images from the metadata. The other SoC has computer vision (CV) algorithms that process the metadata, and a low-speed interface that sends metadata back to the one SoC to adjust and render a next image. The MIPI bridge may comprise a field programmable gate array (FPGA).

公开(公告)号：US20230412928A1

公开(公告)日：2023-12-21

申请号：US17845478

申请日：2022-06-21

Applicant: Snap Inc.

Inventor： Julian Grahsl ,  Alexander Kane

IPC: H04N5/235 ,  H04N13/111

CPC classification number: H04N5/2352 ,  H04N13/111 ,  H04N2213/008 ,  H04N13/243

Abstract: A method of determining an image capture timestamp offset or error includes generating optical flashes at an optical flash rate. A set of images of the optical flashes are captured at an image capture rate. The image capture rate is different from the optical flash rate, and each image includes an associated image timestamp. Signals associated with the generation of the optical flashes are also timestamped. The intensity of each image in the set of images is determined, and the image having the greatest intensity in the set of images is identified. The timestamp offset or error is determined as the difference between the timestamp of the image having the greatest intensity and the timestamp of the corresponding optical flash.