Information communication method for obtaining information specified by striped pattern of bright lines
First Claim
1. An information communication method of 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 a value of a relative exposure time, which is obtained by dividing a luminance of a subject change period by the exposure time set in the setting, is smaller than or equal to 1.5, andwherein the exposure time set in the setting is longer than a period of a high frequency noise included in the luminance of the subject.
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Accused Products
Abstract
An information communication method that enables communication between various devices 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; 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; and obtaining information by demodulating data specified by a pattern of the bright line included in the obtained bright line image, wherein in the obtaining of a bright line image, the bright line image is obtained by capturing light emitted from the subject and expanded by an optical system.
191 Citations
14 Claims
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1. An information communication method of 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 a value of a relative exposure time, which is obtained by dividing a luminance of a subject change period by the exposure time set in the setting, is smaller than or equal to 1.5, and wherein the exposure time set in the setting is longer than a period of a high frequency noise included in the luminance of the subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. 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 executer, 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 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 a value of a relative exposure time, which is obtained by dividing a luminance of a subject change period by a set exposure time, is smaller than or equal to 1.5, and wherein the exposure time set in a setting is longer than a period of a high frequency noise included in the luminance of the subject.
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14. 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 a value of a relative exposure time which is obtained by dividing a luminance of a subject change period by the exposure time set in the setting, is smaller than or equal to 1.5, and wherein the exposure time set in the setting is longer than a period of a high frequency noise included in the luminance of the subject.
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Specification