Water level detector for early warning systems using color difference measurement

摘要: The rise in water level of river may lead to changes geological and artificial environments, thus triggering the possibility different scales geohazards on slopes adjacent river. Therefore, initiation detect monitor levels with remote sensing data should be developed. In this research, a method detecting was principle compare camera’s image keypoint features from before overflow occurrence determined span time. This research used Color Differences images. ΔE* distance metric calculate change structural information It will as reference determining during normal conditions, overflow. Keypoint value an if geohazard riverbank undergo caused by inundation over grass, soil, rocks riverbank. Determination successfully done category difference consisting (Diff ≤ 20%), stand-by (20% < Diff 30%), warning (30% 40%) alert ≥ 50%). system only works well bright lighting conditions not dim conditions.