Abstract
Once the earthquake occurs, the staff of the disaster management bureou of government agencies effort to clarify damage to infrastructure. CCTV (Closed Circuit Television) cameras have developed and have been utilized to survey infrastructure on roads and rivers. We have been studying an automatic system to select CCTV cameras in municipal area, where seismic intensity exceeds a preset level and to render panoramic images by stitching camera images obtained during panning CCTV cameras.
The earthquake can occur under bad lighting conditions such as night. During panning CCTV cameras at night, the bands of light (tails of residual image) are observed in images resulting from electron multiplier tube to obtain the amount of light. The bands of light are noises to render panoramic images.
In this paper, therefore, we propose a method to panning and stopping little by little. The effect of electron multiplier can be different from the type of CCTV cameras. In addition, the conditons around the CCTV cameras can affect the amount of noises (the bands of light). Therefore, we applied our method to CCTV cameras located on different municipal area.
Panoramic images are necessary soon after the earthquake to support the early stage. We validated our method by measuring the stopping time to remove the bands of light. As a result of trial for 16 domestic CCTV cameras, we clarified that almost 3 seconds are adequate to remove the bands.
