摘要:
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 terminal in the indoor space.
摘要:
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, obtaining identification information of the subject, and obtaining an angle of light of the subject. The method further includes calculating a distance between the terminal device and the subject using the angle, obtaining a position of the subject that is specified by the identification information, and calculating a position of the terminal device using the distance and the position of the subject.
摘要:
An apparatus is provided that includes a display, a processor, and a recording medium having a program that causes the processor to execute operations, including obtaining a first image by image capture with a first exposure time by starting exposure for a plurality of exposure lines in an image sensor. The operations also include obtaining a second image, including a plurality of bright lines, by capturing a subject changing in luminance by the image sensor with a second exposure time by starting exposure for the plurality of exposure lines in the image sensor. The operations further include obtaining information by demodulating data specified by a pattern of the plurality of bright lines included in the obtained second image, and displaying a first image on the display during a period of obtaining of the second image using the image sensor.
摘要:
An information communication method of transmitting a signal using a change in luminance is provided. The information communication method includes: determining a pattern of the 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 to indicate 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.
摘要:
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, and obtaining identification information of the subject by demodulating data specified by a pattern of the plurality of bright lines. The method further includes sending (i) the identification information and (ii) language identification information to a server, obtaining a content identified by the identification information from the server, and displaying the translated content.
摘要:
A method is provided for obtaining information from a transmission device using an image sensor that includes a plurality of exposure lines. The method includes obtaining image data by starting exposure sequentially for the plurality of exposure lines each at a different time, starting exposure of a next exposure line before exposure of one exposure line ends, and imaging for a predetermined exposure time. The method also includes obtaining the information by demodulating data specified by a pattern of bright lines that appear in the image data, the bright lines corresponding to the plurality of exposure lines. The method further includes setting the predetermined exposure time so that a relation of tE>tHT is satisfied, where the predetermined exposure time is tE μs, and a period of high frequency noise of a light source included in the transmission device is tHT μs.
摘要:
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.
摘要:
An information communication method of transmitting a signal is provided that uses a change in luminance. The method includes determining a pattern of the change in luminance by modulating the signal to be transmitted, and transmitting the signal by a light emitter changing in luminance according to the determined pattern. The pattern of the change in luminance is a pattern in which one of two different luminance values occurs in each arbitrary position in a predetermined duration. The determining a pattern of change in luminance includes dividing the predetermined duration into four duration units, so that one of two different luminance value occurs in one duration unit of the four duration units and the other luminance value of the two different luminance value occurs in three duration units of the four duration units, the three duration units are other than the one duration unit.
摘要:
An apparatus includes a processor and a recording medium having a program, the program causing the processor to execute operations. The operations include 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. The visible light communication mode includes (i) setting a second exposure time of the image sensor, (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 included in the obtained bright line image.
摘要:
An information communication method includes: setting an exposure time of an image sensor to less than or equal to 1/2000 second so that, in an image obtained by capturing a subject by the image sensor, a stripe bright line parallel to a plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject; obtaining the image including the stripe bright line parallel to the plurality of exposure lines by, using the set exposure time, starting exposure sequentially for the plurality of exposure lines each at a different time; and obtaining information by demodulating data according to, in a pattern of the bright line included in the obtained image, a brightness change in a direction perpendicular to the plurality of exposure lines.