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In this paper, we present a revised method to compute the similarity of traditional string edit distance. Given two strings X and Y over a finite alphabet, an edit distance between X and Y can be defined as the minimum weight of transforming X into Y through a sequence of weighted edit operations. Because this method lacks some type of normalization, it would bring some computation errors when the...
This paper presents a new extended Chan-Vese level set method for ultrasound image segmentation. The proposed method introduces wavelet multiresolution analysis to create an edge representing mask to spot edge information of the image. While the evolution of the level set function, average edge energy of zero level set curve is calculated from the edge representing mask to control the evolving speed...
A priori estimation of flood damage potential helps in crisis management after a large-scale urban flood disaster. Wenshan city is chosen as a sample study area. The procedure of the methodology involves the determination of floodwater depth using GIS method, the remote sensing image interpretation for urban land cover, and the model development for damage calculation. This study aimed at the development...
Video stream segmentation is a critical step in many computer vision applications. Background subtraction based on Gaussian Mixture Model (GMM) is a commonly used technique for video segmentation. In this paper, an improved Adaptive-K Gaussian Mixture Model (AKGMM) method was presented for updating background. The dimension of the parameter space at each pixel can be adjusted adaptively according...
Most automatic speech recognition systems have concentrated exclusively on the acoustic speech signal, and therefore they are susceptible to acoustic noise. The benefits from visual speech cues have motivated significant interest in automatic lip-reading, which aims at improving automatic speech recognition by exploiting informative visual features of a speaker's mouth region, which means speaker...
In this paper, we present a novel method for human-computer interaction based on finger motion detection. Image processing is used to get the position, motion direction and movement of the marked figure in the video image, and then associate them with the cursor position, motion direction and mouse function using windows underlying functions. Experimental results show that the method can accurately...
In night, it is difficult to locate vehicle license plate for vehicle recognition. In this paper, the algorithm uses colorful component in HSV space depending on the character of vehicle images in night, can divide the vehicle- plate region and many noises including vehicle- lamp and it's reflection light and road- line, and can delete the region without similar color of vehicle plate but with higher...
A segmentation method based on texture gradient is proposed for the high resolution remote sensing images which have rich texture information. First, Nonsubsampled Contourlet Transform is used to extract texture features. Second, texture gradient is calculated, and then it is combined with the intensity gradient to get the final gradient. At last, the labeling watershed algorithm is used in segmentation...
The quality of underwater images is directly affected by water medium, atmosphere medium, pressure and temperature. This emphasizes the necessity of image segmentation, which divides an image into parts that have strong correlations with objects to reflect the actual information collected from the real world. Image segmentation is the most practical approach among virtually all automated image recognition...
Accurate hand segmentation is a challenging task in computer vision applications. We propose a new method to segment hand based on free-form skin color model. The pixel value of a person's hand is captured and represented in YCbCr color model. The CbCr color space is mapped to a CbCr plane in order to produce a clustered region of skin color. Then, instead of using ellipse to model the skin color,...
This paper research the use of computer visual and image information collected preprocessing based on pattern recognition of soybean Nitrogen element detect. When Nitrogen elements of the soybean plant changes, color and texture will be characteristic. By nurturing and collecting samples, This work analyzed the characteristics determine preprocessing, established a preprocessing system model. The...
In order to improve color PCB image segmentation problem, research a threshold segmentation based on color features. In the RGB color space by analyzing PCB image of the RGB color features, select a color feature or a combination of components as the color features which distinct foreground from background of PCB image. Through the gray transformation, get the corresponding gray image of the chosen...
Through the systematic research on image segmentation and genetic algorithm applications in image segmentation, this paper proposes some improvements for the traditional genetic algorithm and applies the improved genetic algorithm in image segmentation. The experimental results show that the improved genetic algorithm this paper proposed can quicken the convergence, while maintaining the population...
This paper combined the dependence of statistical features of pixels and the low-level features of image to complete image modeling. Using interactive image segmentation principle, through the posterior probability of maximum labelling field to obtain global energy function. Applying Graph Cut method to minimize the energy function and calculating optimal segmentation labeling of the whole image....
To develop a computer aided detection system that improves diagnostic accuracy of lung cancer on thoracic CT. A novel method for CT image segmentation of lung is proposed, with which, several regions that are suspicious of cancer can be segmented rapidly and effectively. Algorithm of extracting pulmonary parenchyma was introduced firstly to extract pulmonary parenchyma. Secondly, FCM was employed...
This paper proposes a mosaic algorithm based on SIFT(Scale Invariant Feature Transform). Keypoints and their descriptors are exacted by SIFT, which ensures the algorithm robust to translation, rotation, noise and scalling. Then proposed matching algorithm is used to match the keypoints. First, rough match pairs are obtained by Nearest Neighbor algorithm. Second, match rate information of the neighbor...
Segmentation of ship target under complex background has important research significance in long-range ship tracking and identification, and an adaptive segmentation algorithm is proposed according to background images with different complexity. Local complexity of image is first calculated in this algorithm, and then the original image is preprocessed with different denoising methods according to...
It is well known that contours in image are salient when a series of edge elements are aligned in a collinear or co-circular fashion. In this paper, a contour extractor is constructed to extract contours by using the competitive layer mode implemented by Lotka-Volterra recurrent neural networks. This extractor can bind all edge elements which belong to a contour onto a layer. In order to extract long...
In order to deal with the problem of that conventional algorithm of mosaic needed large coincidence region for registration and different gray in coincidence region may influent quality; this paper presents an algorithm of mosaic that combing the Fourier - Mellin Transform (FMT) and the characteristics of the Regional Detection. Firstly, the feature images are intercepted from real images for the...
A method of motion detection and tracking based on multi-camera surveillance system is presented in this paper. First detecting moving blocks by dynamic template, and then check the moving blocks, get the elements of computing movement blocks such as spatial characteristics and histogram then detecting and tracking the moving objects according to characteristics of elements. Experiments show that...
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