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A fast algorithm of extracting laser line is proposed for real-time image processing in 3DLCS and is compared with the former algorithm. First of all, the threshold S(T) of the laser stripe is computed by host computer unnecessarily in real time. Second the laser stripe is determined in real time. At last the central line of the laser stripe is detected by templates in real time. The fast algorithm...
The major drawback of real-time environment matting method is that the extracted environment matte data often contains significant amount of noise and errors. Although some filtering methods have been employed to remove the noise and obtain acceptable composition results, they are incapable of removing potential errors. In this paper, we first establish a light motion field to better describe the...
The problem of finding a match for an image (`template') within a larger image is known as template matching. It is key to a variety of computer vision applications. Currently known template matching algorithms run in fixed time, or are guaranteed to find the best match. We present a novel algorithm which in many cases can guarantee that the best match is found. In other cases it finds a good approximation...
For many images with complicated foreground and background, it is difficult to locate interest object area by automatic segmentation algorithm. Interactive segmentation algorithms can provide effective control on these occasions. Interactive live-wire segmentation algorithm, which can provide accurate, reproducible boundary extraction, is widely applied. However, the algorithm, which employs Dijkstra...
This paper presents a new local binocular stereo matching algorithm. A local window with adaptive support weights is used to aggregate matching costs. A more robust matching score is set up combining sum of absolute intensity differences and a gradient based measure. Each pixel has a different disparity search range according to disparity gradient analysis and computational complexity decreases rapidly...
Simplex growing algorithm (SGA) was recently developed as an alternative to the N-finder algorithm (N-FINDR) which is shown to be a promising endmember extraction technique. This paper further extends the SGA to a real-time processing algorithm, referred to as real-time SGA (RT SGA) that can effectively address four major issues arising in practical implementation for N-FINDR, (1) use of random initial...
Corner detection is an important step in the image processing of machine vision. An improved algorithm is proposed in this paper following the analysis on the existing corner detection algorithms and on the localization precision and computation efficiency in the Harris corner detection algorithm. In this algorithm, a large number of irrelevant points are rejected by statistical analyzing the pixel...
Vertical edge detection is a very important task for image processing-based applications. One of the most common techniques which depends on this task is car license plate detection system. In this work, two contributions are presented and discussed. The first one, a vertical edge detection algorithm (VEDA) is proposed in order to extract vertical edges. The second one, an implementation of VEDA is...
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