Today’s society is highly developed with information technology, and computers have become inseparable from human life. How to better communicate with computers has become an essential topic of human research, and therefore, Human-Computer Interaction technology has come into being. HCI refers to the information exchange process between humans and computers or other external devices, a key technology in computers. The new HCI technology based on bio-electric signals is a hot concern. For example, the interaction method is based on electrical signals such as eye electricity and brain electricity, which is to convert the collected human bio-electric signals directly into computer control commands through algorithm recognition to realize human-computer interaction. Virtual reality, the most advanced computer simulation technology, is an excellent platform for human-computer exchange. With the successful development of digital applications, human-computer interaction and virtual reality also show a trend of deep integration, and these emerging human-computer interaction technologies based on EOG and EEG greatly enhance the immersive experience of virtual reality.
It is understood that WiMi Hologram Cloud, Inc. (NASDAQ:WIMI) is researching the combination of human-computer interaction technology based on EOG signals and VR and developing a virtual reality interaction system based on EOG technology by designing virtual immersive 3D scenes and feedback systems so that users can use human biological The EOG-based virtual reality interaction system enables users to use human biological signals as a communication medium to interact with the virtual environment in real-time, creating an intelligent human-computer interaction mode.
The EOG-based virtual reality interactive system developed by WiMi consists of three main parts: signal acquisition, EOG signal processing, and the virtual reality scene. When the system works, the user receives the stimulus signal from the virtual reality scene in real-time, and the user makes corresponding eye movements according to the stimulus signal. The signal acquisition equipment collects the user’s EOG signal in real-time and then converts it into control commands for the virtual reality scene through a series of signal processing so that the virtual reality scene executes the corresponding orders and provides feedback to the user in a visual way.
EOG signal acquisition
The EOG signal is caused by the difference in electrical potential between the cornea and retina and can be used to reflect eye movements, with amplitudes generally ranging from 0.4 to 10mV. When the human eye performs different movements, it generates EOG signals with different characteristics. The human-computer interaction system based on EOG can be built by designing corresponding algorithms to recognize the attributes of EOG signals and transform them into control commands of external devices.
EOG signal processing
EOG signal processing mainly includes pre-processing, feature extraction, waveform detection, and classification recognition. Many methods exist to pre-process the original EEG signal, including signal amplification, baseline calibration, artifact removal, downsampling, and other methods. EEG signal feature extraction methods generally use the shape feature extraction method based on the signal waveform, wavelet transform method, etc.
Virtual Reality Scene
The virtual reality module is used to build 3D scenes and execute corresponding control commands, simulating the functions of human visual, auditory, tactile, and other sensory organs, enabling people to immerse themselves in the computer-generated virtual realm and creating a humanized multi-dimensional information space. It also adjusts and controls the virtual reality scene by reading the feedback signals’ instructions and providing feedback to the user to stimulate signals to assist them in achieving specific purposes.
Immersion, interactivity, and conceptualization are the three primary characteristics of virtual reality systems. Compared with traditional virtual reality interaction methods (such as VR handles, data gloves, motion capture, etc.), the virtual reality interaction system based on EOG technology developed by WiMi has a strong novelty, and its interaction does not rely on any action or language. The interaction process is more direct. In addition, virtual reality can provide users with more colorful and stimulating stimuli and feedback information, improving the system’s intelligence and ease of use. It can be applied in entertainment games, medical, home applications, and even the industrial field.
