An Improved Inter-frame Difference Algorithm and its Application on Tidal Bore Video Auto Detection

As the mother river of Zhejing Province in the east of China, Qiantang River catch dozens of people's lives every year because of the strong tidal wave. In order to prevent the tidal disaster of Qiantang River, a real-time tidal bore detection and warning system must be built up. In this paper, an improved inter-frame difference algorithm based on Sobel image edge detection technique was presented, based on this this algorithm an intelligent video surveillance system was designed also. Experiments showed that the improved inter-frame algorithm was highly efficient in tidal bore detection not only in detection result but also the detection speed and efficiency. The system included a couple of video servers run on Ti DM6446 DSP and one client run on Windows PC. With this detection system, we have implemented Tidal bore detection and warning system in Qiantang River Successfully.