Handwriting recognition method and system based on WIFI channel state information

Abstract

The invention discloses a handwriting recognition method and a handwriting recognition system based on WIFI channel state information. The method comprises the following steps of S1, using a data acquisition module to collect channel state information, processing the collected channel state information by using a movement section detection and segmentation method, and using a K-nearest neighbor algorithm and a dynamic time normalization method to train a classifier, thus acquiring a trained classifier; and S2, using the data acquisition module to acquire the collected channel state information, recognizing the collected channel state information by using the trained classifier, and thus acquiring a recognition result. According to the method and system provided by the invention, the handwriting letter recognition under the WIFI environment is achieved by using the channel state information of the wireless signal, the limitation that traditional behavior recognition needs the user to additionally carry special equipment is overcome, only the existing common consumption level WIFI equipment is needed, and the additional equipment overheads are reduced.

Description

technical field [0001] The invention relates to the technical field of handwriting recognition, in particular to a handwriting recognition method and system based on WIFI channel state information. Background technique [0002] With the development of Internet of Things technology, behavior recognition technology has gradually attracted people's attention, and as a sub-problem in the field of behavior recognition, handwriting recognition technology has been extensively and deeply studied. As the most basic and natural behavior recognition method, handwriting recognition is mainly divided into online handwriting recognition technology and offline handwriting recognition technology. [0003] Due to the rise of the concept of smart home and the widespread use of mobile devices, wireless routers based on WIFI technology have entered thousands of households. WIFI signals are no longer only used for information communication, but also for behavior recognition. The advantage of us...

AI Technical Summary

Problems solved by technology

Since then, many researchers at home and abroad have started research on CSI-based wireless sensing technology, such as breath detection, indoor positioning, gesture recognition, etc., but they are currently limited to the research stage and there is no specific implementation plan.

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