Information communication method for obtaining information by demodulating bright line pattern included in image

摘要

An information communication method selects between a visible light communication mode in which information is obtained from a subject using an image sensor having a plurality of exposure lines and a normal imaging mode. The method includes obtaining first image data by image capture with a first exposure time in the normal imaging mode. When an image is presented that prompts a user of a terminal device including the image sensor to move the terminal device to enable the information to be obtained, second image data is obtained by image capture with a second exposure time, shorter than the first exposure time, in the visible light communication mode. The information is obtained by demodulating data specified by a direction in a pattern of a bright line appearing in the second image data and corresponding to the exposure lines that is substantially perpendicular to the exposure lines.

主权项

1. An information communication method for selecting between a visible light communication mode in which information is obtained from a subject using an image sensor having a plurality of exposure lines and a normal imaging mode, the information communication method comprising:
obtaining first image data by image capture with a first exposure time in the normal imaging mode by sequentially starting exposure of each of the exposure lines of the image sensor at different times and starting exposure of a next one of the exposure lines before exposure of a current one of the exposure lines is complete; and when an image is presented that prompts a user of a terminal including the image sensor to move the terminal to enable the information to be obtained, and the user moves the terminal in accordance with the presented image, obtaining second image data by image capture with a second exposure time in the visible light communication mode by sequentially starting exposure of each of the exposure lines of the image sensor at different times and starting exposure of a next one of the exposure lines before exposure of a current one of the exposure lines is complete, and obtaining the information by demodulating data specified by a direction in a pattern of a bright line appearing in the second image data and corresponding to the exposure lines that is substantially perpendicular to the exposure lines, the second exposure time being shorter than the first exposure time.