Information communication method

A non-transitory recording medium storing thereon a computer program, which when executed by a processor, causes the processor to perform operations, comprising:

• obtaining image data by starting exposure sequentially for a plurality of exposure lines of an image sensor 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;
• obtaining 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;
• and
• 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 a transmission device is tHT μs.

A device that obtains information from a transmission device using an image sensor that includes a plurality of exposure lines, the device comprising:

• a processor;
• and
• a memory storing thereon a computer program, which when executed by the processor, causes the processor to perform operations including:
• 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;
• 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;
• and
• 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.