公开(公告)号：US11542035B2

公开(公告)日：2023-01-03

申请号：US16953752

申请日：2020-11-20

Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY

Inventor： Yukihiro Takahashi ,  Junichi Kurihara ,  Tetsuro Ishida

IPC: H04N7/00 ,  H04N7/18 ,  B64D47/08 ,  B64C27/04 ,  B64C39/02 ,  G01J3/51 ,  G02F1/13 ,  G01J3/02 ,  G01N21/31 ,  G01J3/28 ,  G01J3/32 ,  G01J3/12 ,  G02F1/1335 ,  G01N21/17

Abstract: A spectral camera control device, being installed, along with a spectral camera provided with a liquid crystal tunable filter, in an aircraft capable of stationary flight. The spectral camera control device causes the spectral camera to capture a spectral image in a snapshot mode each time a transmission wavelength of the liquid crystal tunable filter is switched while the aircraft is in stationary flight, and the spectral camera control device causes a plurality of spectral images to be captured in succession at a same transmission wavelength when an SN ratio of the captured spectral image is less than a predetermined threshold.

公开(公告)号：US11573124B2

公开(公告)日：2023-02-07

申请号：US16953910

申请日：2020-11-20

Applicant: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY

Inventor： Yukihiro Takahashi ,  Junichi Kurihara ,  Tetsuro Ishida

IPC: H04N7/00 ,  G01J3/28 ,  B64C39/02 ,  B64D47/08 ,  G01J3/02 ,  G01J3/32 ,  G01J3/51 ,  G01N21/31 ,  G02F1/1335 ,  G01J3/12 ,  H04N7/18

Abstract: A spectral image capturing method using a spectral camera control device installed in aircraft, the method comprising:
a) setting an exposure time of the spectral camera so that a current exposure time is determined (S2),
b) determining whether or not either an amount of attitude change or an amount of position change of the spectral camera per exposure time exceeds a predetermined threshold based on a spatial resolution of the spectral camera (S4),
c1) when exceeding the predetermined threshold, resetting the current exposure time to be shorter (S5),
c2) when not exceeding the predetermined threshold, not resetting the current exposure time to be shorter, and
d) capturing a spectral image in a snapshot mode with the spectral camera using the reset exposure time,
wherein when the transmission wavelength of the liquid crystal tunable filter is switched while the aircraft is in a stationary flight, steps b) to d) are repeated.