Underwater video regulation is an insightful research field that can help engineers with bettering investigation on the lowered condition. Submerged video preparing has been utilized in a many fields, such as submerged infinitesimal location, landscape examining, mine identification, media transmission connections, and self-proficient lowered vehicles. Be that as it may, submerged video experiences solid assimilation, dissipating, shading contortion, and clamor from the manufactured light sources, causing video obscure, cloudiness, and a somewhat blue or greenish tone. In this way, the improvement can be separated into two techniques, submerged video de-preliminaries and underexposed video concealing remaking. Relentless in remote correspondence structures, for instance 3G, 4G, and so on, a coming crisis is endless deftly of the nonattendance of consistently Radio Frequency (RF) resources; this deterrent in moving speed cannot strengthen the improvement notable for high information speed. So the new innovation of Light-Fidelity (Li-Fi) came into picture. This innovation can be contrasted to that of Wi-Fi and offers points of interest like expanded available spectrum efficiency, effectiveness, security, low idleness and a lot higher speed. Communication is accomplished by exchanging light-emitting diode (LED) lights on and off at a speed higher than what is detectable to the human eye. This paper presents the explanation behind underexposed picture corruption and surveys the cutting-edge knowledge calculations like video reduce hazing algorithm. In this calculation, it uses two different de-hazing methods, simple Dark Channel Prior (DCP) and Approximate Dark Channel Prior (ADCP), to reduce haze in a video.

A wireless patient monitoring system involves remote supervision of sensitive patients by wirelessly transmitting patient information to distant locations, especially in pandemic situations like COVID-19. Li-fi-based communication protocol is used in healthcare which helps in reducing the challenges faced by medical professionals in effectively monitoring multiple patients as well as average persons in public places. Due to COVID-19, doctors/healthcare workers are compelled to work with infected patients. This proposed technique lets them observe patients without being on their bedside, whether in the hospital or at home. This device can also be installed in public places to detect the abnormal and symptomatic persons who are affected by COVID-19. It is used to monitor patient health, ranging from heart rate, body temperature, ECG, breathing, non-invasive blood pressure, oxygen saturation, etc. Wireless patient monitoring using li-fi eliminates national therapy barriers. Thus, a li-fi-based patient monitoring system will lead to a significant role in Healthcare services. The radiation-free device shall be implemented in all the industries to find the COVID-19-affected persons easily.