Information communication method for obtaining information specified by striped pattern of bright lines
First Claim
1. An information communication method for obtaining information from a subject, the information communication method comprising:
- setting an exposure time of an image sensor so that in an image obtained by capturing the subject by the image sensor, a plurality of bright lines corresponding to a plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject;
obtaining a bright line image, including the plurality of bright lines, by capturing the subject that changes in luminance by the image sensor with the set exposure time; and
obtaining the information by demodulating data specified by a striped pattern of the plurality of bright lines included in the obtained bright line image,wherein the exposure time set in the setting is shorter than a first period, the first period is a second period of changing of luminance of the subject subtracted by a gap time between an exposure starting time of each of the plurality of exposure lines and an exposure starting time of an adjacent exposure line, the second period is a changing luminance period (i) between a timing from a high luminance to a low luminance and a timing from the low luminance to the high luminance, or (ii) between a timing from the low luminance to the high luminance and a timing of the high luminance to the low luminance.
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Abstract
An information communication method is provided for obtaining information from a subject. The method includes setting an exposure time of an image sensor so that, in an image obtained by capturing the subject by the image sensor, a plurality of bright lines corresponding to 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 the 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 obtaining the information by demodulating data specified by a striped pattern of the plurality of bright lines included in the obtained bright line image.
194 Citations
8 Claims
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1. An information communication method for obtaining information from a subject, the information communication method comprising:
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setting an exposure time of an image sensor so that in an image obtained by capturing the subject by the image sensor, a plurality of bright lines corresponding to a plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject; obtaining a bright line image, including the plurality of bright lines, by capturing the subject that changes in luminance by the image sensor with the set exposure time; and obtaining the information by demodulating data specified by a striped pattern of the plurality of bright lines included in the obtained bright line image, wherein the exposure time set in the setting is shorter than a first period, the first period is a second period of changing of luminance of the subject subtracted by a gap time between an exposure starting time of each of the plurality of exposure lines and an exposure starting time of an adjacent exposure line, the second period is a changing luminance period (i) between a timing from a high luminance to a low luminance and a timing from the low luminance to the high luminance, or (ii) between a timing from the low luminance to the high luminance and a timing of the high luminance to the low luminance. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An information communication device that obtains information from a subject, the information communication device comprising:
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a processor; and a memory having a computer program stored thereon, the computer program causing, when the computer program is executed, the processor to execute operations including setting an exposure time of an image sensor so that, in an image obtained by capturing the subject by the image sensor, a plurality of bright lines corresponding to a plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject; obtaining a bright line image, including the plurality of bright lines, by capturing the subject that changes in luminance by the image sensor with the set exposure time; and obtaining the information by demodulating data specified by a striped pattern of the plurality of bright lines included in the obtained bright line image, wherein the exposure time set in the setting is shorter than a first period, the first period is a second period of changing of luminance of the subject subtracted by a gap time between an exposure starting time of each of the plurality of exposure lines and an exposure starting time of an adjacent exposure line, the second period is a changing luminance period (i) between a timing from a high luminance to a low luminance and a timing from the low luminance to the high luminance, or (ii) between a timing from the low luminance to the high luminance and a timing of the high luminance to the low luminance.
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8. A non-transitory recording medium storing computer software for use in a computer that obtains information from a subject, the computer software causing the computer to execute instructions comprising:
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setting an exposure time of an image sensor so that, in an image obtained by capturing the subject by the image sensor, a plurality of bright lines corresponding to a plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject; obtaining a bright line image, including the plurality of bright lines, by capturing the subject that changes in luminance by the image sensor with the set exposure time; and obtaining the information by demodulating data specified by a striped pattern of the plurality of bright lines included in the obtained bright line image, wherein the exposure time set in the setting is shorter than a first period, the first period is a second period of changing of luminance of the subject subtracted by a gap time between an exposure starting time of each of the plurality of exposure lines and an exposure starting time of an adjacent exposure line, the second period is a changing luminance period (i) between a timing from a high luminance to a low luminance and a timing from the low luminance to the high luminance, or (ii) between a timing from the low luminance to the high luminance and a timing of the high luminance to the low luminance.
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Specification