Patent ID: 8988574
Filing Date: 2015-03-24
Classification: H04B,H04N,H04W

Abstract:
1. An information communication method for obtaining information from a subject, the information communication method comprising: setting a first 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 appear according to a change in luminance of the subject; obtaining a bright line image including the plurality of bright lines, by capturing the subject changing in luminance by the image sensor with the set first exposure time; obtaining the information by demodulating data specified by a pattern of the plurality of bright lines included in the obtained bright line image, wherein in the obtaining of a bright line image, exposure starts sequentially for the plurality of exposure lines each at a different time, and exposure of each of the plurality of exposure lines starts after a predetermined blank time elapses from when exposure of an adjacent exposure line adjacent to the exposure line ends; setting a second exposure time of the image sensor so that exposure starts sequentially for the plurality of exposure lines in the image sensor each at a different time and each of the plurality of exposure lines partially overlaps in exposure time the adjacent exposure line; and obtaining a normal image by capturing the subject with the second exposure time, wherein in the obtaining of the bright line image, the first exposure time is shorter than the second exposure time and is less than or equal to 1/480 second so that the plurality of bright lines appear in the bright line image.