Tham khảo tài liệu 'geoscience and remote sensing, new achievements part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 28 Geoscience and Remote Sensing New Achievements possible to monitor real time PM10 air pollution at multi location. This is an attempt to fulfill the need for preventing long exposure to this harmful air pollution. The object of this study is to develop a state-of-the-art technique to enhance the capability of the internet surveillance camera for temporal air quality monitoring. This technique is able to detect particulate matter with diameter less than 10 micrometers PM10 . An empirical algorithm was developed and tested based on the atmospheric characteristic to determine PM10 concentrations using multispectral data obtained from the internet surveillance camera. A program is developed by using this algorithm to determine the real-time air quality information automatically. This development showed that the modern Information and Communications Technologies ICT and digital image processing technology could monitor temporal development of air quality at multi location simultaneously from a central monitoring station. 2. Description of the Algorithm In this study we developed an algorithm based on the fundamental optical theory that is light absorption light scattering and light reflection. This algorithm is used to perform image processing on the captured digital images to determine the concentration of atmospheric aerosols. Fig. 1. The skylight parameter model to illustrate the electromagnetic radiation propagates from sunlight towards the known reference and then reflected to propagate towards the internet surveillance camera penetrating through the interaction in atmospheric pollutant column. Internet Surveillance Camera Measurements of Atmospheric Aerosols Concentration 29 Figure 1 shows the electromagnetic radiation path of ambient light propagating towards the internet surveillance camera and then this electromagnetic radiation is reflected by a known reference target and penetrating through the ambient pollutant column. At the ambient pollutant column this
