Video Image Detector Calibration Period Decision
Chungwon Lee, Baik Nam Cheol, 송영화, Jinhwan Jang · Journal of the Eastern Asia Society for transportation studies/Journal of the Eastern Asia Society for Transportation Studies · 2005
The accuracy of a video image detector(VID) is gradually reduced due to the various environmental and mechanical factors. But there has been no systematic research about this VID accuracy decreasing. To maintain a proper level of VID accuracy for the advanced traffic management. a regular VID calibration process needs to be introduced. Because of its cost, however. the calibration cannot be performed frequently. Therefore, the method to decide the optimal calibration interval should be studied in details. This study presents two different calibration interval decision methods. Using the invented data collection equipment. some data in the field were collected and analyzed. which were used for the adaptability checking. Although the data were limited. the result is pretty promising. More data needs to be investigated later and this study will help to maintain the data quality of the ITS center.