Information transmission system using light as communication medium, information transmission method, image pickup device, and computer programmed product

Abstract

A CPU 36 of a light emitting unit 30 fetches ith bit of transmission information TX stored in a transmission data memory 33 in synchronization with a clock signal CK from a timing generator 35. The CUP 36 determines the bit value and fetches a first pattern sequence SA from a pattern data memory 44 when the bit is logic signal 1, and fetches a second pattern sequence SB from a pattern data memory 34 when the bit is logic signal 0, and outputs the first pattern sequence SA and second pattern sequence SB to a light emitting section 37. While, a CPU 39 of a light receiving unit 40 extracts a pixel area with a time sequence luminance variation pattern from a frame image captured into a capture image buffer 46, and binarizes the luminance variation pattern, and performs logic determination. A liquid crystal display 44 displays information of a light emitting area to be overlapped with a subject image.

Description

[0001]Notice: More than one reissue application has been filed for the reissue of U.S. Pat. No. 6,933,956. The reissue applications are the present application and application Ser. No. 11 / 895,260, filed on Aug. 23, 2007, of which the present application is a Divisional Reissue Application now U.S. Pat. No. Re. 42,848. BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an information transmission system available for displaying the explanation of commodity products at the store, explanation of exhibit products at a museum, an exhibition, and for displaying landmarks and advertisements of building, etc., crowd state of amusement facilities such as an-amusement park, and relates to an information transmission method, an image pickup device, and a computer programmed product.[0004]2. Description of the Related Art[0005]Conventionally, display for information relating to commodity and exhibit products, display for landmarks and advertisements...

AI Technical Summary

Benefits of technology

The present invention provides an information transmission system that can prevent distortion caused by light interference during information transfer using light as the communication medium. This ensures accurate transmission and reproduction of information at all times. The method includes an information transmission device and an image pickup device.

Problems solved by technology

(1) In the case where the number of information presenting objects is large, the number of information presentations such as signboards, etc increases, resultantly, main object does not become conspicuous. Moreover, the relationship between the information presentation and the information presenting object cannot be easily understood. Erroneous understanding of information occurs in some cases. For example, there is a case in which information on goods A is misunderstood as information on goods B.

(2) Character information written on the information presentation can be read by anyone who has normal eyesight. For this reason, in order to present limited information (for example, purchasing cost of goods, maximum reduction rate, etc.,) to only specific persons, it is necessary to take protection measures such as information coding, and so on. However, complicated information coding has to be simplified since the usability is bad, and this causes a possibility that the effect of information coding will be reduced and that such information will be easily read.

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