**1. Introduction**

The disease referred to as "the extreme acute breathing syndrome coronavirus 2 (SARS-CoV-2)" was determined in year end of 2019. As per reports, this disease was originated in China, have become the reason of disorder referred to as "Corona Virus Disease 2019" or "COVID-19". The WHO (World Health Organization) has declared

this disorder as a "deadly disease" in March 2020 [1, 2]. As per the reviews delivered and up to date with the aid of using worldwide health organizations, authorities/ entities and governments, pandemic has affected tens of thousands and thousands of human beings globally [3]. The maximum severe contamination due to COVID19 is associated with the lungs which include pneumonia. The signs and indications of the disorder may range & consist of excessive body temperature (high fever), dyspnea, coryza and cough. These instances can be normally recognized through the usage of lung x-ray evaluation of the irregularities [4].

Throughout this hasty period, several scholars have tried towards expand numerous transmission gear and diagnosing systems. Such as, the RT-PCR (Reverse Transcriptase-Polymerase Chain Reaction), which is still the vital testing technique to discover extreme severe breathing disease SARS-COV2 [1, 2, 4] and in addition to COVID-19 [3]. Though RT-PCR is considered to be the best method of screening so far, it still has limitations. The working system of Reverse Transcriptase-Polymerase Chain Reaction (RT-PCR) is complex and time-consuming [2, 4–11]. Thus, attempts were attempted to detect COVID-19 thru lung x-ray images which include CT (Computed Tomography) or lung x-beam photographs. It is said the investigative significance and accurateness of CT lung photographs over RT-PCR in COVID-19 [2] are highly accepted. The discoveries display that a lung CTs are an excessive sensitivity for the analysis of COVID [2].
