Light Pollution Measurement Based On Color Camera Imaging

The development of lighting technology have made outstanding contributions tothe improvement of the life quality, but with human disorderly, excessivedevelopment and abuse, some light have changed into redundant and harmfulpollution source, and become a new physical pollution after water, air and noisepollution-light pollution. Light pollution would cause harm to urban social life,including human mental and physical health, and growth of plants and animals. Inrecent years, this issue which was widely ignored has become “one of the mostrapidly increasing alterations to the natural environment”. Excellent visibility,comfortable, safe and charismatic light environment is the urgent requirement toimprove life quality of urban population. Therefore, we should start studying lightpollution measurement methods and means of implementation as soon as possible,formulate light pollution prevention technical specifications of our country, and thenimplement light environment monitoring in urban areas.This subject studied and analyzed technical publications and measurementmethods of domestic and foreign, for light pollution prevention and control. Byanalyzing produced theory of pollution, survey of light pollution, measurementparameters, and laboratory simulation, we made a depth study on resulting reasonsand mechanism, physical parameters to be measured, measurement theories andevaluation methods of typical light pollution. The main achievements of this study areas follows:1. Analyze the theories of main light pollution forms, survey on status of urbanlight pollution, analyzing causes, measurement content, measurement methods andevaluation methods of typical pollution types including glare pollution, sky glow, lighttrespass and over illumination.2. Research and analyze the existing light pollution measurement methods,comparatively analyze the advantages and disadvantages of different methods, and onthis basis, explore integrated measurement system solutions for light pollutionmeasurement, research the basic theories of optical measurement, propose newmeasurement method for typical light pollution, and then construct the light pollutionmeasurement system.3. Implement color calibration, luminance calibration and camera internal parameters calibration for this system, and then analyze the precision of experimentresults. Research glare evaluation and measurement methods through laboratorysimulation glare environment, and evaluate the performance of this system.