公开(公告)号：US10236979B2

公开(公告)日：2019-03-19

申请号：US15383272

申请日：2016-12-19

Applicant: FUJITSU LIMITED

Inventor： Kensuke Kuraki ,  Keizo Kato ,  Ryuta Tanaka

IPC: H04B10/00 ,  H04B10/116 ,  H04J14/00

Abstract: A transmitter includes a light source which enables changing the characteristic of light, on a time-series basis, and a controller which sets a predetermined duration for a symbol included in information to be transmitted and controls the light source to change the characteristic of the light emitted by the light source, on a time-series basis in accordance with a value of the symbol in the duration. A receiver includes a camera which generates a plurality of images each recording an image capturing range including at least a part of an area irradiated with the light from the transmitter, with a predetermined image capturing period, and a processor configured to extract a feature amount representing the characteristic of the light, from each of the plurality of images, and decode the value of the symbol from a time-series change in the feature amount.

公开(公告)号：US09865028B2

公开(公告)日：2018-01-09

申请号：US15072003

申请日：2016-03-16

Applicant: FUJITSU LIMITED

Inventor： Keizo Kato ,  Kensuke Kuraki ,  Ryuta Tanaka

IPC: G06K9/00 ,  G06T1/00 ,  H04N1/32

CPC classification number: G06T1/0021 ,  G06T1/0028 ,  G06T1/005 ,  G06T2201/0061 ,  G06T2201/0065 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32251 ,  H04N1/32288 ,  H04N1/32293 ,  H04N1/32304 ,  H04N1/32309

Abstract: A memory stores video information obtained by photographing an object that reflects light in which embedded information is superimposed onto a plurality of components in a color space. A processor emphasizes a signal obtained from an image included in the video information on the basis of a result of emphasizing a first color component more than a second color component according to a spectral reflection characteristic in a range including the object, and detects the embedded information from the emphasized signal, the first color component and the second color component being from among a plurality of color components that correspond to a plurality of wavelengths, the first color component having a reflectance higher than a reflectance of the second color component. A display device outputs information on the basis of the embedded information detected by the processor.