A secondary imaging mixed frame information analysis method and system

Abstract

This application provides a secondary imaging mixed frame information analysis method and system, by determining the information embedding method of the sending end, the transmission information is embedded into the original video frame according to the information embedding method of the sending end, as the video frame to be sent; Send the video frame to the receiving end; the receiving end receives the video frame to be sent, and takes the received video frame as the received video frame, and the relational expression between the received video frame and the video frame to be sent satisfies the preset mixed frame model; Determine the received video frame as the frame header in the frame received video frame, and start from the received video frame as the frame header, divide the (A+2) frame received video frame into one group; the receiving end determines that each group receives the video frame The difference frame with the largest spatial mean value of the absolute value is used as the best difference frame; the receiving end decodes and judges the best difference frame to obtain a decoding judgment result, which is the video frame sent by the sending end Embedded information to ensure that the receiving end can parse out the information transmitted by the sending end.

Description

technical field [0001] The present application relates to the field of communication technology, and in particular to a method and system for analyzing mixed frame information of secondary imaging. Background technique [0002] In recent years, with the popularity of high-resolution cameras in handheld electronic terminals, cameras have begun to be used to interact with the environment to obtain data, and visible light imaging communication applications have emerged. It operates on the visible light spectrum, uses light-emitting diodes or display screens as the sending end, and cameras as the receiving end, and transmits information through optical line-of-sight channels, which has gradually become a new trend in visible light communication. At present, there are mainly two types of visible light imaging communication: display and implicit. Among them, the most common application of display imaging communication is two-dimensional code. more and more scholars' attention. ...

AI Technical Summary

Problems solved by technology

[0003] At present, the research on visible light implicit imaging communication has made some progress, but it is still difficult to guarantee the reliability of information transmission. One of the main reasons is the direct frame synchronization problem of the display screen-camera link, such as the mixed frame problem (which can It is understood that the video frame played on the display screen is captured by the camera at the receiving end after secondary imaging, and the captured video frame is a linear mixture of adjacent original video frames)

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