Visible light stripe code modulation and identification method based on RGB LED lamp

Abstract

The invention discloses a visible light stripe code modulation and identification method based on an RGB LED lamp. The method comprises the steps that at a transmitting end, three pulse signals with different phase differences, duty ratios and frequencies are input through PWM modulation, red, green and blue lamp beads of RGB LEDs are controlled to emit light with different flicker frequencies andbrightness respectively, and the different RGB LEDs are endowed with unique IDs; at a receiving end, a CMOS camera is used for shooting an RGB LED image, and the area, the stripe number and the bright and dark stripe duty ratio characteristics of the RGB LED image are extracted through image processing; a classifier is established by utilizing machine learning according to the extracted RGB LED features; and features of the RGB LED image to be judged are extracted, and the classifier is utilized to judge the category to which the RGB LED image belongs so as to realize detection and identification of the light stripes. The method is simple and feasible, can be realized by combining an existing lamp with a smart phone, and has wide market value.

Description

technical field [0001] The invention relates to the technical field of LED visual detection and recognition, in particular to a visible light bar code modulation and recognition method based on RGB LED lamps. Background technique [0002] The Internet of Things is an important part of the new generation of information technology, and it is also an important stage of development in the "informationization" era. Its English name is: "Internet of things (IoT)". As the name suggests, the Internet of Things is the Internet of things connected. This has two meanings: first, the core and foundation of the Internet of Things is still the Internet, which is an extended and expanded network based on the Internet; Exchange and communication, that is, things are closely related. The Internet of Things is widely used in the integration of networks through communication perception technologies such as intelligent perception, identification technology and pervasive computing. Therefore,...

AI Technical Summary

Problems solved by technology

However, QR code scanning is not only cumbersome, but also difficult to implement outdoors, especially at night and in poor light conditions; and the transmission distance is short, and the amount of information carried is small

Images