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 recoding medium storing a computer program, which, when executed by a processor, cause the processor to perform operations including: determining a pattern of a change in luminance, by modulating the signal to be transmitted; and transmitting the signal, by at least one light emitter changing in luminance according to the determined pattern of the change in luminance. The signal has a plurality of blocks, each block of the plurality of blocks includes (i) address information that indicates a position of a data segment in the signal and (ii) the data segment. In the transmitting, the signal is transmitted repeatedly at different times. The address information is used to identify a same location of the block data segment in the signal transmitted at a first time and in the signal transmitted at a second time, which is different from the first time. The signal has a check signal.
Abstract:
An apparatus is provided that includes a display, an image sensor having a plurality of exposure lines, a processor, and a memory storing a computer program, which when executed by the processor, causes the processor to perform operations. The operations include displaying a first assist image on the display, and executing a visible light communication mode. In the visible light communication mode, the operations include (i) setting a second exposure time of the image sensor so that, in an image obtained by capturing a subject by the image sensor, a plurality of bright lines corresponding to the plurality of exposure lines included in the image sensor appear according to a change in luminance of the subject, (ii) obtaining a bright line image including the plurality of bright lines, and (iii) obtaining information by demodulating data specified by a pattern of the plurality of bright lines.
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, by capturing the subject that changes in luminance, and obtaining identification information of the subject. The method further includes sending the identification information to a first server, obtaining access information from the first server, sending the access information to a second server, and obtaining information from the second server.
Abstract:
An apparatus includes a processor and a recording medium having a program, the program causing the processor to execute operations. The operations include providing a normal mode and a visible light communication mode, wherein the normal mode and the visible light communication mode are switchable. In the normal mode, first image data is obtained by image capture with a first exposure time by sequentially starting exposure for a plurality of exposure lines in an image sensor each at a different time and each of the plurality of exposure lines partially overlaps in exposure time an adjacent exposure line. In the visible light communication mode, (i) a second exposure time of the image sensor is set, (ii) a bright line image is obtained, and (iii) information is obtained by demodulating data specified by a pattern of the plurality of bright lines included in the obtained bright line image.
Abstract:
An information communication method is provided for obtaining information from a subject using a terminal device. The method includes obtaining and holding identification information of devices, and service information associated with the identification information, from a server. The method also includes setting an exposure time of an 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, and obtaining a bright line image including a plurality of bright lines. The method further includes obtaining identification information of the subject, by demodulating data specified by a pattern of the plurality of bright lines included in the obtained bright line image, selecting service information associated with the identification information, and presenting the service information to a user of the terminal device.
Abstract:
An information processing program causes a computer to execute: encoding information to be transmitted, to determine a luminance change frequency; and outputting a signal of the determined luminance change frequency to cause a light emitter to change in luminance according to the determined luminance change frequency to transmit the information. In the encoding, each of a first frequency and a second frequency different from the first frequency is determined as the luminance change frequency. In the outputting, each of a signal of the first frequency and a signal of the second frequency is output as the signal of the determined luminance change frequency, to cause the light emitter to change in luminance according to the first frequency during a first time and change in luminance according to the second frequency during a second time different from the first time after the first time elapses.
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:
A visible light communication method transmits a signal by visible light communication. The visible light communication method includes modulating the signal into a predetermined blinking pattern, and transmitting the signal by causing visible light to blink according to the predetermined blinking pattern and toward a wall, from a projector disposed in an indoor space surrounded by the wall. The visible light communication method also includes projecting video from the projector toward the wall, wherein the visible light is reflected by the wall to prevent the signal from being received outside of the indoor space, and the signal is used to transmit data related to the video projected to a terminal in the indoor space.
Abstract:
A visible light communication method transmits a signal by visible light communication. The visible light communication method includes modulating the signal into a predetermined blinking pattern, and transmitting the signal by causing visible light to blink according to the predetermined blinking pattern, from a projector disposed in an indoor space surrounded by a wall toward the wall. The visible light communication method also includes projecting video from the projector toward the wall, wherein the visible light is reflected by the wall to prevent the signal from being received in an outside of the indoor space, and the signal is used to transmit data related to the video projected to a plurality of terminals in the indoor space.