公开(公告)号：US20210049399A1

公开(公告)日：2021-02-18

申请号：US16977130

申请日：2018-03-05

Applicant: NEC CORPORATION

Inventor： Kengo MAKINO ,  Toru TAKAHASHI ,  Rui ISHIYAMA ,  Yuta KUDO

IPC: G06K9/46 ,  G06K9/62 ,  G06K9/68

Abstract: An image matching device that performs matching between a first image and a second image includes: a frequency characteristic acquisition unit configured to acquire a frequency characteristic of the first image and a frequency characteristic of the second image; a frequency characteristic synthesizing unit configured to synthesize the frequency characteristic of the first image and the frequency characteristic of the second image to generate a synthesized frequency characteristic; a determination unit configured to perform frequency transformation on the synthesized frequency characteristic to calculate a correlation coefficient map whose resolution coincides with a target resolution, and perform matching between the first image and the second image based on a matching score calculated from the correlation coefficient map; and a regulation unit configured to regulate the target resolution based on the matching score.

公开(公告)号：US20180039830A1

公开(公告)日：2018-02-08

申请号：US15549223

申请日：2016-02-25

Applicant: NEC CORPORATION

Inventor： Rui ISHIYAMA ,  Toru TAKAHASHI ,  Yuta KUDO

IPC: G06K9/00 ,  G06F17/30 ,  G06F17/18 ,  G06K9/62

CPC classification number: G06K9/00577 ,  G06F16/51 ,  G06F17/18 ,  G06K9/6267 ,  G06K2009/00583 ,  G06Q50/04 ,  G06T7/00 ,  Y02P90/30

Abstract: A comparison system includes a portable terminal including image capturing unit configured to capture a comparison image of a predetermined comparison region of a comparison object; and a server including comparison unit configured to compare the comparison object with a registered object on the basis of a statistical value for the luminance value of pixels in a registered image of the registered object, the pixels of the registered image existing at pixel positions corresponding to pixel positions estimated to be generating specular reflection in the comparison image captured by the portable terminal.