Patent ID: 8803915

Claim:
An information display device, comprising: an imaging section configured to time-sequentially take images of an object; an obtained information processing section configured to obtain information for display which is transmitted, by optical space transmission, from a light source contained in the object whose images have been taken; a communication information processing section configured to restore the information for display; a calculation section configured to calculate a value representing a degree of stability of communication by the optical space transmission, which communication is performed in obtaining the information for display; an information generation section configured to select superimposition information from among the information for display in accordance with the value representing the degree of stability; and an image superimposition section configured to superimpose the superimposition information on the taken images of the object and display the superimposition information superimposed on the images on a display device, wherein the information generation section selects a larger amount of information as the superimposition information from among the information for display when a state of the communication is determined to be stable based on the value representing the degree of stability than when the state of the communication is determined to be unstable based on the value representing the degree of stability.