Two-dimensional encoding and decoding method of visible light locating

Abstract

The invention discloses a two-dimensional encoding and decoding method of visible light locating. The method is based on visible light encoding of OOK, and can be used to realize indoor visible lightlocating. Light sources are encoded, certain carrier frequency is used to modulate the same, thus the light sources are enabled to display a light-dark-alternating polygonal pattern on a CMOS (Complementary Metal-Oxide-Semiconductor) camera, which is set with the certain scanning frequency, while illumination is carried out. An image is collected through a binocular camera fixed on mobile equipment, the obtained image is processed and decoded to obtain information which is carried thereby, to distinguish the light sources of different locations, and finally, a location of the equipment is calculated and obtained by binocular locating technology. Based on visible light two-dimensional encoding and decoding technology, the useful information contained in the image can be quickly and efficiently extracted, the different light sources can be identified, and locating on the equipment can be realized. Encoding and decoding of indoor visible light are realized, and the method has the advantages on the aspects of encoding rules, accuracy, reliability, stability, versatility and the like.

Description

technical field [0001] The invention relates to a two-dimensional encoding and decoding method for visible light positioning, and belongs to the technical fields of image processing and visible light positioning. Background technique [0002] With the rapid development of wireless sensor networks and Internet of Things technology, indoor positioning technology has been widely used in the fields of intelligent robots, shopping guides in large shopping malls and other fields. Although indoor positioning technologies based on Bluetooth, radio frequency, ultrasonic, infrared, ultra-bandwidth, and WiFi have been developed, these positioning technologies require additional auxiliary positioning equipment, which greatly increases the cost of indoor positioning and has strict requirements on the application environment. [0003] As an emerging indoor positioning technology, visible light communication can use visible light to realize high-speed wireless communication. At the same t...

AI Technical Summary

Problems solved by technology

[0004] Existing visible light positioning systems and methods using image sensors, such as: Chinese invention patent "An indoor visible light self-positioning system and method based on binocular technology" (2018107961366), and "Positioning and navigation system based on indoor lighting" (201210484538.5 ), "Binocular Uncalibrated Space Positioning Method" (CN102622767B), "An Indoor Visible Light Positioning System" (CN107703485A), "An Indoor Visible Light Asynchronous Positioning Method Using a Camera" (CN105306141A), etc., all have one-dimensional coding Unity, difficult to identify and other problems, large positioning error, low positioning efficiency, and easily affected by indoor environmental factors, there are more or less shortcomings in terms of accuracy, reliability, stability and versatility

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