Information communication apparatus, method and recording medium using switchable normal mode and visible light communication mode

A method, comprising:

• 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,
• 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 second exposure time being set so that the plurality of bright lines corresponding to the plurality of exposure lines included in the image sensor appear in the second image according to a change in luminance of the subject,
• obtaining information by demodulating data specified by a pattern of the plurality of bright lines included in the obtained second image, and
• displaying the first image of the display a second time, instead of displaying the second image, when the image sensor receives the first image followed by the second image.

A non-transitory computer-readable recording medium having a program stored therein that when executed by a processor 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,
• 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 second exposure time being set so that the plurality of bright lines corresponding to the plurality of exposure lines included in the image sensor appear in the second image according to a change in luminance of the subject,
• obtaining information by demodulating data specified by a pattern of the plurality of bright lines included in the obtained second image, and
• displaying the first image of the display a second time, instead of displaying the second image, when the image sensor receives the first image followed by the second image.