公开(公告)号：US20240144531A1

公开(公告)日：2024-05-02

申请号：US17975458

申请日：2022-10-27

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Yow-Wei CHENG ,  Ling-I Hung

IPC: G06T7/80 ,  G06T7/11

CPC classification number: G06T7/80 ,  G06T7/11 ,  G06T2207/30244

Abstract: In one example in accordance with the present disclosure, a mobile device is described. The example mobile device includes an image sensor to capture an image frame. The example mobile device also includes a processor for performing simultaneous localization and mapping (SLAM). The example mobile device further includes a memory communicatively coupled to the processor and storing executable instructions that when executed cause the processor to: (1) determine a current location of the mobile device in a local map based on features extracted from the image frame; (2) perform a panoramic check to determine whether a threshold number of keyframes surrounding the current location have been captured; and (3) determine whether to add the image frame to a keyframe database for local mapping based on the panoramic check.

公开(公告)号：US20200213582A1

公开(公告)日：2020-07-02

申请号：US16634106

申请日：2017-07-26

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Yow-Wei CHENG ,  Emily Ann Miginnis

IPC: H04N17/00 ,  H04N5/235

Abstract: In an example, a computing device extracts a first pre-defined region of interest (ROI), a second pre-defined ROI, and a third pre-defined ROI from an image captured by the imaging device. Further, a first signal-to-noise ratio (SNR), second SNR, and a third SNR is calculated for the first, the second, and the third pre-defined ROIs respectively. The computing device computes a variance of the first SNR with respect to the second SNR and the third SNR, the second SNR with respect to the third SNR and the first SNR, and the third SNR with respect to the first SNR and the second SNR. Based on the variance, a pre-defined weight is associated with the first SNR, the second SNR, and the third SNR to obtain weighted SNR values. Based on the weighted SNR values, the computing device evaluates the dynamic range of the imaging device.