公开(公告)号：US20210027202A1

公开(公告)日：2021-01-28

申请号：US17042465

申请日：2019-03-11

Applicant: NEC CORPORATION

Inventor： Arun Kumar CHANDRAN ,  Wen ZHANG ,  Yusuke TAKAHASHI

IPC: G06N20/00 ,  G06Q30/02 ,  G06Q10/06 ,  G06N5/04

Abstract: Methods and systems for performance modeling of crowd estimation techniques are provided. The system for modeling of crowd estimation techniques includes one or more crowd estimation modules for estimating a crowd count of a crowd in an image and a performance modeling module for each of the one or more crowd estimation modules. The performance modeling module determines a plurality of performances of the corresponding crowd estimation technique at a plurality of crowd levels and models a performance of the crowd estimation technique in response to the plurality of performances of the crowd estimation techniques

公开(公告)号：US20210012506A1

公开(公告)日：2021-01-14

申请号：US16980726

申请日：2019-02-27

Applicant: NEC CORPORATION

Inventor： Arun Kumar CHANDRAN ,  Wen ZHANG ,  Yusuke TAKAHASHI

IPC: G06T7/11 ,  G06T7/77

Abstract: Methods and systems for crowd level estimation are provided. The system includes a plurality of performance modeling modules (206), an input module (202) and a crowd estimation technique integration module. The plurality of performance modeling modules (206) performance model each of a plurality of crowd estimation techniques based on an accuracy thereof at different crowd levels and/or at different locations. The input module (202) receives an image of a crowd. The crowd estimation technique integration module (208) selects one or more of the plurality of crowd estimation techniques in response to the performance modeling of the one or more of the plurality of crowd estimation techniques and an estimated crowd level and/or an estimated location. The crowd estimation technique integration module (208) then estimates a crowd count of the crowd in the received image in accordance with the selected one or more of the plurality of crowd estimation techniques.

公开(公告)号：US20210390738A1

公开(公告)日：2021-12-16

申请号：US17287006

申请日：2019-08-16

Applicant: NEC Corporation

Inventor： Arun Kumar CHANDRAN ,  Yusuke TAKAHASHI

IPC: G06T7/80 ,  G06K9/62 ,  G06K9/00 ,  H04N17/00 ,  G06K9/46

Abstract: An automatic method improves calibration of the camera by detecting key body points on people in images (100); extracting, from the key body points, orthogonal lines that extend from a head to feet of the people (110); selecting, from the orthogonal lines, head-toe lines of the people who are standing upright in the images (120); and calibrating the camera from the head-toe lines of the people who are standing upright in the images (130).

公开(公告)号：US20230196783A1

公开(公告)日：2023-06-22

申请号：US18112856

申请日：2023-02-22

Applicant: NEC Corporation

Inventor： Arun Kumar CHANDRAN ,  Wen Zhang ,  Yusuke Takahashi

IPC: G06V20/52 ,  G06V10/50 ,  G06V40/10 ,  G06F18/2321

CPC classification number: G06V20/53 ,  G06V10/50 ,  G06V40/103 ,  G06F18/2321

Abstract: Methods and systems for crowd level estimation are provided. The system for crowd level estimation includes an input module and a crowd level estimation module. The input module receives an input image of a crowd and the crowd level estimation module estimates a crowd level of the crowd in the input image in response to a crowd density level.

公开(公告)号：US20210049369A1

公开(公告)日：2021-02-18

申请号：US16968640

申请日：2019-03-08

Applicant: NEC Corporation

Inventor： Wen ZHANG ,  Arun Kumar CHANDRAN ,  Hui Lam ONG

IPC: G06K9/00

Abstract: The present disclosure relates to methods and systems for identifying an individual in a crowd. The method comprises the steps of capturing a plurality of crowd-viewing images using multiple image-capturing devices. For each image, a reference point within a facial contour of a person in the image is selected. The reference point is selected based on a facial feature on the facial contour of the person. The method further comprises the step of processing the image to obtain one or more angular measurements associated with a posture displayed by the person in the image. Based on the obtained angular measurements, location data of a predetermined body point of the person relative to the reference point is extracted.

公开(公告)号：US20210027069A1

公开(公告)日：2021-01-28

申请号：US17042474

申请日：2019-02-27

Applicant: NEC CORPORATION

Inventor： Arun Kumar CHANDRAN ,  Wen ZHANG ,  Yusuke TAKAHASHI

IPC: G06K9/00 ,  G06K9/32 ,  G06K9/46 ,  G06K9/62

Abstract: Methods and systems for crowd level estimation are provided. The system for crowd level estimation includes an input module and a crowd level estimation module. The input module receives an input image of a crowd and the crowd level estimation module estimates a crowd level of the crowd in the input image in response to a crowd density level.