Abstract:
A communication method used in a terminal is provided that includes a front camera and a back camera. The communication method includes switching between the front camera and the back camera according to an orientation of the terminal, and performing visible light communication by using the front camera or the back camera, which is selected in the switching. The performing of visible light communication includes capturing a first subject that is changing in luminance by using the front camera and obtaining a first image when the front camera is used, capturing a second subject by using the back camera and obtaining a second image when the back camera is used, and obtaining specified information that is related to the first subject or the second subject.
Abstract:
A position estimation device including: a provisional position setting unit which sets current position information indicating an estimated current position of a wireless terminal; a distance estimation unit which estimates, using receiving strengths of signals received from plural wireless stations, distance information indicating distances from the plural wireless stations to the wireless terminal; a possible area calculation unit which calculates, using the distance information and map information indicating a spatial structure, an area in the spatial structure which can maintain the distances indicated in the distance information, as a possible area in the spatial structure in which the wireless terminal is likely to be present; and a correction unit which corrects the current position indicated in the current position information to a position within the possible area when the current position is outside the possible area.
Abstract:
An information communication method is provided for transmitting a signal using a change in luminance. The information communication method includes determining a pattern of the change in luminance by modulating a signal to be transmitted, and transmitting the signal by a display, which comprises a light emitter that changes luminance according to the determined pattern. In the determining a pattern, the pattern of the change in luminance is determined by adjusting a first time from one change in luminance to a next change in luminance according to the signal, the one change in luminance and the next change in luminance being a same one of a rise and a fall in luminance.
Abstract:
An information communication method for obtaining information from a subject includes transmitting position information indicating a position of an image sensor used to capture the subject, and receiving an ID list that is associated with the position indicated by the position information. The method also includes setting an exposure time of the image sensor so that a bright line corresponding to an exposure line included in the image sensor appears according to a change in luminance of the subject. The method further includes obtaining a bright line image including the bright line by capturing the subject that changes in luminance by the image sensor with the set exposure time, obtaining the information by demodulating data specified by a pattern of the bright line included in the obtained bright line image, and searching the ID list for identification information.
Abstract:
An information communication method includes: setting an exposure time of an image sensor so that, in an image obtained by capturing a subject by the image sensor, a bright line corresponding to an exposure line included in the image sensor appears according to a change in luminance of the subject; capturing the subject that changes in luminance by the image sensor with the set exposure time, to obtain the image including the bright line; and obtaining information by demodulating data specified by a pattern of the bright line included in the obtained image.
Abstract:
A method includes setting an exposure time of an image sensor included in a terminal device so that, in an image obtained by capturing a subject by the image sensor, a bright line corresponding to each of a plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject. The method also includes obtaining a bright line image including a plurality of bright lines, by capturing the subject that changes in luminance by the image sensor with the set exposure time. The method further includes estimating a plurality of center areas each of which is in each of the plurality of bright lines, and obtaining identification information of the subject, by demodulating data specified by a pattern of the plurality of center areas.
Abstract:
A display method includes capturing, by an imaging sensor, a still image lit up by a transmitter that transmits a signal by luminance change of light as a subject to obtain a first captured image with a first exposure time. The still image is captured to obtain a second captured image with a second exposure time which is longer than the first exposure time. The display method further includes decoding the signal form the first captured image, and determining whether identification information included in each of a plurality of sets is identical to the decoded signal. Further, the method also includes reading the video included in each of the sets with the identification information identical to the decoded signal, and superimposing the video on a target region corresponding to the subject in the second captured image for display on a display.
Abstract:
An information communication method is provided for obtaining information from a subject using a terminal device that includes an image sensor having a plurality of exposure lines. The method includes setting an exposure time of the image sensor so that, in an image obtained by capturing the subject by the image sensor, a bright line corresponding to each of the plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject. The method also includes obtaining a bright line image including a plurality of bright lines, obtaining identification information of the subject, and sending the identification information to a server. The method further includes obtaining menu information related to the identification information from the server, the menu information related to a restaurant where the subject is installed, and displaying the menu information on a display of the terminal device.
Abstract:
A transmitting method for enabling transmission of a visible light signal in short time includes: determining a pattern of change in luminance of the light emitter by modulating a signal; and transmitting the visible light signal by changing luminance of a red color represented by a light source according to the determined pattern. The visible light signal includes data, a preamble, and a payload. In the data, a first luminance value and a second luminance value appear along a time axis. In the payload, the first luminance value and the second luminance value appear alternately along the time axis, each of a time length in which the first luminance value is maintained and a time length in which the second luminance value is maintained is greater than a first predetermined value and is determined in accordance with the signal and a predetermined method.
Abstract:
An information communication method obtains information from a subject using a terminal device that includes an image sensor having a plurality of exposure lines. The method includes setting an exposure time of the image sensor so that a bright line corresponding to each of the plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject. The method also includes obtaining a bright line image including a plurality of bright lines, and obtaining identification information of the subject. In obtaining of the bright line image, an exposure time of each of the plurality of exposure lines partially overlaps with an exposure time of an adjacent one of the plurality of exposure lines. A pattern of a change in luminance of the subject is the same as a pattern of a change in luminance of another adjacent subject.