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A lot of transition mechanisms have been proposed and standardized in Internet Engineering Task Force (IETF), to support the coexistence and interoperability of IPv4 and IPv6. Among them, the 4over6/6over4 edge network tunneling technique has become a particular hot subject recently. To apply this technique into real ISP networks, there is a practical problem: planning the placement of the tunnel...
We propose a new method to extract foreground edges in a video streams taken from a stationary camera. Our background model is based on the fact that a background pixel's gradient components follow Gaussian mixture model(GMM). GMM is performed on the initial group of video frames to obtain the initial pixel gradient component distribution information at each pixel. Then each of the current Canny edge...
This paper presents a real-time robust algorithm to automatically detect and classify round road signs on Chinese highways. As most of road signs on Chinese highways have circular borders, the detection system first takes advantage of a real-time circle detection algorithm to extract the regions of interest (ROI). Then the color and texture pattern in each ROI is analyzed and compared with sample...
This paper presents a new method based on digital image processing to realize the real-time automatic vehicle speed monitoring using video camera. Based on geometric optics, it first presents a simplified method to accurately map the coordinates in image domain into real-world domain. The second part is focused on the vehicle detection in digital image frames in video stream. Experiment shows it requires...
This paper presents a robust real-time algorithm to automatically detect and accurately locate ellipse objects in digital images. The algorithm consists of three steps. First the edge pixels are extracted using Canny edge detection algorithm and then a noise removal process is run to remove the non-ellipse edgepoints. In the second step, a direct least-square-fitting algorithm is used to calculate...
This paper presents a real-time robust algorithm to detect and accurately locate the circular objects in digital images. The algorithm consists of four steps.First the edge pixels are extracted using Canny edge detection algorithm followed by a noise removal process to remove the non-circle edge points.Afterwards, a direct least square fitting algorithm is developed to calculate radius and circle...
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