Information communication method of obtaining information from a subject by demodulating data specified by a pattern of a bright line included in an obtained image

An information communication method of obtaining information from a subject, the information communication method comprising:

• obtaining a first image by capturing the subject using an image sensor that includes a plurality of exposure lines;
• detecting a range in which the subject is captured, from the first image;
• determining, from among the plurality of exposure lines, predetermined exposure lines for capturing the range in which the subject is captured;
• setting an exposure time of the image sensor so that, in a second image obtained using the predetermined exposure lines, a bright line corresponding to the predetermined exposure lines appears according to a change in luminance of the subject;
• obtaining the second image including the bright line, by capturing the subject that changes in luminance using the predetermined exposure lines with the set exposure time;
• and
• obtaining the information by demodulating data specified by a pattern of the bright line included in the obtained second image,
• wherein the exposure time is set according to the range in which the subject is captured, when the exposure time is automatically set.

An information communication device which obtains information from a subject, the information communication device comprising:

• a first imaging unit configured to obtain a first image by capturing the subject using an image sensor that includes a plurality of exposure lines;
• a detection unit configured to detect a range in which the subject is captured, from the first image;
• a determination unit configured to determine, from among the plurality of exposure lines, predetermined exposure lines for capturing the range in which the subject is captured;
• an exposure time setting unit configured to set an exposure time of the image sensor so that, in a second image obtained using the predetermined exposure lines, a bright line corresponding to the predetermined exposure lines appears according to a change in luminance of the subject;
• a second imaging unit configured to obtain the second image including the bright line, by capturing the subject that changes in luminance using the predetermined exposure lines with the set exposure time;
• and
• an information obtaining unit configured to obtain the information by demodulating data specified by a pattern of the bright line included in the obtained second image,
• wherein the exposure time is set according to the range in which the subject is captured, when the exposure time is automatically set.

A non-transitory computer-readable recording medium storing a program for obtaining information from a subject, the program causing a computer to execute:

• obtaining a first image by capturing the subject using an image sensor that includes a plurality of exposure lines;
• detecting a range in which the subject is captured, from the first image;
• determining, from among the plurality of exposure lines, predetermined exposure lines for capturing the range in which the subject is captured;
• setting an exposure time of the image sensor so that, in a second image obtained using the predetermined exposure lines, a bright line corresponding to the predetermined exposure lines appears according to a change in luminance of the subject;
• obtaining the second image including the bright line, by capturing the subject that changes in luminance using the predetermined exposure lines with the set exposure time;
• and
• obtaining the information by demodulating data specified by a pattern of the bright line included in the obtained second image,
• wherein the exposure time is set according to the range in which the subject is captured, when the exposure time is automatically set.